Finally a person who measures and doesn't believe any tales that float around. Watched five vids about this topic and none of them presented any factual evidence. They all just talk about what they 'think' or 'believe'. Waste of time. Thank you for doing it much better.
Hey Mick, Thank you! Please keep in mind, different cars/engines will get different gains. The VQ37VHR engine in the G37/370 sure seems to respond well to a K&N filter.
Hey Mick, Ahhhh yes the roar can be delightful!! On my 95 Maxima with a K&N cone filter it was wonderful! With the K&N panel filters, I don't hear anything :(
Hey Stephen, Hmmm, that has not been my experience. My 95 Maxima (VQ30DE) picked up 14 HP with a y-pipe, 6 HP with a K&N cone and 5HP with a larger b-pipe. My G37 (VQ37VHR) also has done OK. The KA24DE (same as your 240ZX) in my 99 Altima is stock, but maybe I should try a K&N on that. What VQ engine/car didn't respond to mods and what were the mods? I am interested to know more...
I don't understand all the hate this video is getting. do people not realize for spending $100 on 2 filters to gain 14 WHEEL hp is a fucking great deal. In most cases you're going to have to spend 5x-10x that amount on a catback to gain the same amount of hp. The whole idea behind this is just a comparison and I'm glad he posted it too.
Hey sk8punk318, Thanks for your comment. People think I am paid by K&N and have lied about the results. I do like K&N products, however I have only reported the data that I paid to collect (I purchased the filters used and paid for 2 hours of dyno time) I had planned to go back to the dyno for a retest in October/November but my work schedule didn't allow it. Now I am planning on the spring. This follow up test will include a NEW OEM filter, the used K&N and no filter. I think the results will be very interesting.
Motorvate DIY I used brand new paper filters (week old) and achieved the same results you did after replacing them with K&N drop-ins. I gained 13.36 HP It was 84 degrees here in Houston at the time.
Buy aftermarket filters once or buy OEM filters multiple times when they're dirty. They can possibly pay for themselves while the car being quicker and better mpg's. I always buy dry filters due to the MAF.
Yes, I was a little surprised... On my 95 Maxima a K&N cone filter with a Stillen velocity stack made 6 peak HP, and sounded fantastic at wide open throttle!
Motorvate DIY i drive a 12 cts coupe and they only sell a k&n thyphoon intake for this model but its an aluminum tube and the cone is not completely covered so im going to buy just the filter :)
Since the G37 uses two intakes and two filters, switching to K&N probably makes more of a difference than most engines. But damn 14hp just from a filter swap? I'm lucky if I get that out of an expensive cat back exhaust.
That is a clean new change.... Go 5000kms with the KN, the air sucking pulls oil off the KN filter and coats your MAF. making engine performance and gas mileage MUCH worse.
What most people don't understand, is that you will get a small boost in hp & torque. But where you really feel the gains is in throttle response! I have noticed in my FX 35's response was 2 times quicker than before I installed my K&N stage 2 CAI system. Improved a couple points in mpg as well. So the moral of the story with cold air intakes, is you get small/minuscule hp, torque & mpg gains, & dramatic throttle response gains! Add a performance mass air sensor, & a $600'ish high flow cat-back exhaust, & you will think you have a different engine under the hood.
This video convinced me to grab a pair of K&N filters for my G37 sedan. Maybe it's just a placebo effect but it does seem like the car has a bit more pep in its step in the mid-range power. I don't like to just hear "OMG buy this filter it'll make your car faster" but your video with real measurable results sold me on it. I think you made the right call on saying it's a worthy modification to do to your car. Thumbs up!
I put a pair on mine shortly after buying it 5 years ago and I knew it was a difference I just never measured it. But they're so plentiful nowadays on the internet you can get a whole kit for a hundred bucks. And it looks so much better than stock. And I live in Florida with 11 month Summers and have yet to have a problem with the heat coming off my engine into the motor. Easily the best $100 mod for this motor.
I have both stock paper and K&N. Why do I have both? Bcz I use K&N and the days where I have to clean/dry/recoat oil/dry, but have to use my car, I would temporarily use paper filter for that day or two and then once my K&N filter is fully dry and ready to go, I will pop my K&N back in and keep my paper filter for nxt cleaning interval. I've cleaned my air filter 4 times, have roughly almost 200k miles. My paper filter is nearly as good as new still even till this day bcz I used it total of 5 days throughout 14 years.
Motorvate DIY Np. Thanks for showing the data. I use both but paper filter is only for temporary purpose. Data u showed + less hassle is the reason why kn is the way to go. Ppl make all these bs reasons to bash kn saying kn will destroy the engine. I used kn filter, my engine is almost 200k, not a single problem. I've maintained my car as optimal as possible. oil changing with quality synthetic oil, decent/good oil filter, flush out transmission fluid along with replacing spin on filter every time, replacing spark plugs to ngk laser iridium, bleeding and flushing brake fluids whenever I replace brake pads, changing cabin filter, flushing out coolant, but now, I bought kn cabin air filter yesterday. I am a proud kn filter owner. Stock products suck. Aftermarket quality products are the way to go. Your video and data proves my point.
Great Video man I have used K&N air filters for over 12 years never had an issue. People don't realize how great they flow when dirty, and they over clean them. They also don't realize how little oil K&N puts on them at the factory.
Hey Ford ST, I think you nailed it! Just for kicks I will be going back to the dyno to re-test just to double check my results. It should be very interesting.
The first thing I do to my vehicles from my Camaro to my Acura. K&N panel filter. It really brings the engine to life with a deeper breathing scream. Thanks for proving the performance gain , they are great value
I beg to differ Motorvate..I got rid of my G37 as did my son with his 350Z. Mods did next to nothing for these cars and it's documented on myg37.com. I traded the G37 and picked up an 06 C6 Corvette and have never regretted it even after the lifter sand cam went south.
Hey Stephen, That's interesting... I am all over myg37.com everyday and haven't seen any posts where people did an intake and exhaust and didn't measure a gain. I have no first hand knowledge on the 350Z, so I can't comment on that. Would I trade in my G37 for a C6??? In about 2 heart beats, however I still need 4 doors for a while. Enjoy your C6!
Hey hectoronthemoon, Thanks for your kind words. Since I am learning Adobe After Effects that gray only took 3 days to organize the data and animate. All just for you :)
Top video! A fair comparison which seems to answer the age old question. This is better myth-busting than MCM!!! More power could probably got with a re-tune too :-)
Phil, thank you!! The problem I have with getting a tune is the cost!! It would be about $800 Canadian for maybe 10-15 HP. That $800 dollars gets me closer to a new 4K camera :)
Watched your video and decided what the hell im going to buy some. They were about $130 for both and i thought it was pricey. Intsalled them in the parking lot then went home. Wow! i actually feel the power. I have a heavy foot so im always above 5000RPM and man what a difference
K&n ruined my mass air flow sensor. Over time, the oil comes off the filter and up into the air intake, and I did not over oil this thing. Also, I noticed you can see holes through the filter, kind of like looking through a screen. I'm sure it has better air flow, but does not work as good as a filter.
I understand what you are saying about how easy it is to see through the K&N filter, it does look like it is full of holes! As for the ability to filter the air, I will be getting my used oil analyzed this will and will have a look at the results. (typically silicon (sand) is high (> 30 parts per million) if the filter is not working well. I hope to change my oil this week and take in a sample. I had a K&N cone filter on my 99 Maxima for just over 300,000 Km it didn't have an issue. I suspect newer cars might have more sensitive air flow meters.
I've had a K&N filter on my 2000 Nissan Maxima for 16 years, up until last year. I had a Blackstone oil analysis done and my silica levels were in the 100's. I changed back to paper recently, in the past 6 months, and will do another oil analysis to see if the silica drops, which I think it will. I don't think it's adversely affected my car, although I did have to replace my mass air flow sensor like constatbuzz above. I have since, in the last 2 weeks, given my Maxima to my 15 year old son and purchased myself a 2013 G37xS. I'm ecstatic...
Wow, 100 PPM iv VERY high for silica! (sand). The next episode (March 3) I will be showing my used oil analysis of 6 months with a paper filter vs 6 months with the K&N.
Sorry, I miss spoke about the silica levels. The number is actually 26, with 14 being the average so they are still high. I was trying to figure out how I could post my report but haven't been able to just yet.
Those are much better silica numbers. It is my understanding anything under 30 parts per million (ppm) is OK. It will be interesting to compare my 6 month used oil analysis with the K&N with yours.
Hey adrian castillo, I do find it hard to believe that was almost 4 years ago! AND those same air filters are still in my car and haven't been cleaned yet. Have a look at the 50,000 KM update from last year: K&N Filter Test… Two Years and 50,000 KM Later: Motorvate's DIY Garage Ep.34 th-cam.com/video/7D9lJxQ1s-U/w-d-xo.html
Yes that would be interesting and could be made into a 3 way comparison (paper, K&N panel and Takeda) Unfortunate, my budget for this year won't allow it. :(
Motorvate DIY i already car shop machine dyno compared k&n vs stock. so i already knew k&n made more power on same day dyno few minutes apart. also my butt dyno, cold air intake made more top rpm torque vs k&n short intake which made more torque @ lower rpm.
Hey Guivensthecar guy, Thanks! Once the funds are in place, I will be going back to the dyno for a re-test. BUT this time using brand new Infiniti filters, used K&N and even no air filter. It should be interesting seeing what the data shows!
Hey Ali Ben Ashour, That was my mini tribute to Jeremy Clarkson. He would make a stupid voice like that when he would imitate "haters" talking. Thanks for noticing!
Thanks for this very helpful video. Lots of people (formerly me included) believe an aftermarket air filter adds maybe 1 or 2 hp gain and your video gave a very solid evidence it does much better. Best way to admit my wrong is to just go and spend my money to prove I'm a believer and, thanks to you, I have!
Hey Asad S, Thanks for your comment. Please keep in mind that every car/engine will respond differently, but in the example of the G37/370z the engine responds well :)
Hey Nick Amarit, That is where I messed up... I used the filter that came with the car when I bought it. However, I will be going back to the dyno with a brand new Infiniti air filter for a re-test. I will compare a clean K&N, dirty K&N, New Infiniti filter and a few runs without an air filter AND data log coolant & oil temps and a few others. Stay tuned for the update!
@@MotorvateDIY Use your standard filter the K N is not worth extra money you pay for them stay with what ever your make tells you to use ,And dont fall for the nitrogen in your tyres scam its big scam .
Hey goldwingman1500, I am comfortable with the K&N filters and have used them for over 30 years with a combined total "K&N filter" mileage somewhere around 500,000 KM on 5 different cars and 1 bike., without any issues. Have you had a failure of something due to a K&N filter? Don't forget, since the filters can be cleaned, they will save you money in the long run. The G37 uses 2 air filters and they are $30 each at the dealer or $25 for after market. Two K&N filters are about $120 US / $160 Canadian. After 3-4 years of use, the K&N filters are paid for and SAVE me money. As for nitrogen in the tires I get the "econo 78" nitrogen.... you know the 78% version :)
@@MotorvateDIY all air cleaners as lons as there clean stay with your normal Filter bugger K,N Filters are over priced and change you air cleaner oil filter and will have no trouble ( hope)
My K & N filter on my 2ZZ-GE really made a huge diff! I’d guess like 3-4hp gain and I felt all of the gains at 4000-5500rpm, right in the toque dip zone! I also cut a cutout in my bumper to work with the oem airbox cold air setup and THAT gave me legit 5-10whp!! That bumper cutout changed the way this lil 1.8 liter engine breathes!!!
Thanks for your comment. As for power gains, it really depends on the design of the intake and engine. For the engine in the G37/370, it does like to breathe deep and anything to help that does make more power.
I bought a KNN filter for my wife’s 2016 tracks in the car typically got between 30 to 33 miles per gallon in the city after installing the KNM filter our gas mileage dropped to 26.5. I thoroughly cleaned it real oiled it put it back in and gained 1/2 mile per gallon to 27. I took the filter out put it back in the box and put a GM AC Delco paper filter back in it.
all the sooks comparing prices and other sooks crying about maf sensor etc, im just here buying a new k&n each time mine gets dirty, self oiling never turns out like factory pre oiling.
Hey Kemal Keza, You just might be on to something here. BUT since my pockets are not a deep as yours :), I just need to be VERY careful when oiling them and spray less then you think you need.
Nutjob Joe, I will do it if you do it :) Actually some cars loose power without an air filter, if they have mass air flow fuel injection. When the air box doesn't have a filter, the air turbulence is much greater and confuses the mass air flow sensor. As a result, it does not provide the correct signal to the ECU and the fueling is incorrect.
Nutjob Joe You'll also toast your engine. I'm a motorcycle mechanic and have seen first hand numerous times how dirt in your engine leads to failure. Use an air filter, unless you have more money than sense and can rebuild your engine whenever it shits the bed because of dirt in the combustion chambers.
I thought it was common knowledge that KN air filter are less restrictive compared to stock. It's why the oil is needed, to catch the fine dust particles. I have one running in a 5.0 super charged V8 and I just did a clean and re-oil on mine to find not one bit i dust in the air tubes leading into the super charger had been let through. These air filters work if oil and maintained correctly.
Hey Brian Koncyk, Thanks... Now I just want to point out that not engines will respond the same way as this one. It depends on the design and if the engine computer (ECU) can take advantage of the additional air flow. In the case here, the VQ37VHR and the K&N work very well :)
Thanks for posting this video. I just ordered a Z1 Silicone Post-MAF Intake Hoses and k&N drop in's. I'm going to clean out the throttle body to help improve performance when I do the installation.
Hey lazy1972, They should work well... Cleaning the throttle body is a very good idea. Actually that is an episode that is in post production right now and should be posted in the next few weeks. Make sure you do the three procedures that the factory manual tells you to do. They are easy and prevents a high idle.
Hey Jay Hale, Hmmm... I though comparing a slightly used filter to a freshly cleaned K&N wasn't an "apples to apples" test, BUT you raise a very good point! I am planning on going to a different dyno to retest. This time with a brand new Infiniti filter, used K&N, freshly cleaned K&N and just for kicks no filter at all. I hope to get to the dyno in January. Thanks for your comment :)
Hi, I live in Brazil and I have a 12/12 nissan tiida, I acquired a sports air filter (national), with the high performance polyurethane foam material, it has in theory the same kind of k & n maintenance, we use for the process neutral detergent and after washing, we greased the same mineral oil (Vaseline). I did the maintenance of it already 3 times, in the last I exagerei in the oil and my car came to give the light of engine anomaly, code (sensor maf p0102). From the first moment I thought that I had damaged the sensor, however I did the cleaning with a clean electric contact and now working and apparently the engine seems more round (obs: in the cleaning I saw that the air box also had a lot of oil and I cleaned it too she). As I had this problem with the oil exagerate, it is justified that in maintenance we have to be careful and not exaggerate in the oil, otherwise the maf sensor would certainly have suffered, over time.
Thanks for your comment! I do think they are worth it... and in a follow up episode (to be released in the summer) I will be re-testing the stock - vs used K&N - vs new K&N - vs used paper filter - vs NO AIR filter on a different (and more accurate) dyno :)
Wow! Thanks for the video. I think I’ll skip out on CAI and just buy some filters and achieve similar if not the better performance! Plus I won’t have to worry about sucking up water!
In many cases, the stock intake is well designed for air flow and designed to handle heavy rains. When I see a cone filter behind the grill, I honestly worry about what can happen in heavy rain to that engine.
Hey tbbsrr, Thanks! I am planning on going back for a re-test. This time comparing brand new Infiniti filters, dirty K&N, clean K&N and no filter at all. It should be very interesting!
It may not produce much HP gain, but it certainly allows more air into the engine whilst still providing excellent filtration. An aftermarket filter only pays dividends on more highly tuned vehicles, that can benefit from more air into the engine. On a standard vehicle you will see little return, other than the ability to clean and reuse the filter.
It really depends on the design goals of the engine. On the 370z/G37 the engine makes peak power at 7,000 RPM so it is designed for high air flow. Anything to reduce intake restriction will result in less pumping loss, which makes more power.
I've watched several of your videos now. I don't have the know how or the tools to do most of the work you're doing but I just swapped my air dirty air filters with paper ones. Now I'm wondering if I should replace them with K&N. Thanks for your video. I'm amazed at how professional they are! Your camera angles and audio quality and even your video introduction. Very impressive!!!
One thing I didn't mention in the video is the cost savings of the K&N filters. Two K&N filters cost about $120, and since they can be cleaned and re-oiled, they will last 10+ years. Two paper filters are about $40. The K&N filters are paid for after three paper air filter replacements. ($40 x 3 = $120, the same cost of the K&N filters) Thank you for kind comments on the quality, I am glad you noticed. :)
Now a days newer cars are designed pretty well and pretty much already have a "cold air intake" and improvement is normally minimal at best. For $100 and just a filter swap....thats pretty legit. Ive run K&N's since i started driving 20 years ago. NEVER had any issues. Looking to buy a G37 this weekend possibly. I know what ill be doing first lol.
We have the same experience... My first K&N was for my 1986 Taurus and I have used them ever since. Good luck on the G37 purchase. Just make sure to check oil pressure to make sure the oil gallery gasket isn't leaking. At 80C/176F you should have > 14 psi. Anything less is a concern. Good luck!
I've used these filters for years. Never any problems and usually got better Mpg's. of you get gains then look at it as a bonus. Non more replacing pricey filters all the time. I just bought 2 for my q60. Pretty cheap mod for 14 horsepower.
Hey Mcufre, Every engine/ECU will respond differently. The G37's engine (VQ37VHR) has TWO air boxes/throttle bodies, has variable valve timing, variable valve LIFT and revs to 7,500 RPM. This engine is designed to breathe and so it responds very well. Other engines/ECUs may not be able to take full advantage of the "potential" additional air flow.
NIce. We did similar tests on 1.8 liter Miata's, 1000cc Yamaha and Suzuki's. We compared K&N to foam pods on the bike engines. In each case we saw 7 to 9 % gains with oiled K&N.
Hey Thai Gyro, Thanks for you comment. Have you done any testing with the newer "dry" style filters? As you know, many people are worried about the oil in the filter hurting the MAF sensor.
Not specifically for MAF failure testing. In the past, we have seen tests results from K&N and a few others. We believe that the conclusions clearly show no failures due to K&N oil contamination. Urban legend is not an accepted form of data, for us. When we do expensive testing, like dyno runs, we ensure proper sequences to avoid speculation. We prefer oiled cotton, like K&N over dry. Both can work fine, but we do a lot of dual sport and motard bike engines, so get into dusty conditions, where the oiled cotton, we believe, protects better. Never experienced a MAF sensor failure due to filter type...most sensors fail due to design style or simply manufacturing defects. Hot wire MAF's are delicate, but a good one will last many years, if the entire system is well maintained. The real contamination problem that we see, comes from either the PCV systems performance or the fuel tank vent/vapor system failures. Often, these use shared plumbing, adding to diagnosis complications.
Got one in my 2019 Mazda3 hatchback. If it gained 7whp, it's worth the 50 bucks. The noise alone is worth it because the Mazda3 is engine bay is so insulated. Cork Sport sells an intake system for $200. It's a short ram which draws in hot air and makes 5-7whp. I bet the K&N with the stock box is just as good or even better since it draws in colder outside air.
I have a K&N air filter housing and filter. I'll be honest it's a pain in cleaning and adding a really thin layer of K&N oil. I usually park my truck for the day and put it in the next day just so the really thin oiling has absorbed/semi dried so the wet oil on the filter doesn't screw with my sensor and bugger it up. Horse power gain hardly noticeable. Too much work involved with a K&N air filter in my opinion, considering when buying a disposable you quickly put it in and eventually toss it and buy another, it's time saving. I do recommend if you do go with K&N kits buy another filter to have previously oiled and ready so you can just toss it in without the wait. I also noticed too that the filter get's dirtier faster which is contributed by thin layer of oil in my opinion which requires more frequently cleaning and going through the process again.
@@MotorvateDIY if you ever have the time or money, maybe doing something with the silicone intake tubing, that would be great! Love the video man. Lots of clean information
Hey JauntyBishop, Thanks for your kind words. I am planning on going to a different dyno and do a re-test. This time I will have brand new Infiniti air filters, used K&N, freshly cleaned K&N and just for kicks, a few dyno runs without an air filter.
@@MotorvateDIY also, would you be to test the Green Filter vs K&N? Seems like the Green Filter have gained a lot of recognition over the years. Be an interesting comparison since your test are completed with minimal variables, and accuracy is on point.
Thanks for the comment. As I have found out, talking about K&N filters is a controversial topic and opinions are strong and very divided. All I wanted to do, is to show the results I got... and I have :)
The bad thing about this is that you gain torque and hp but it performances at a higher rpm, and in a city use or always low rpm use it doesn't works too much because you're not always driving at 5000 or 6000 rpm. I have to say that it really saves fuel, for my 2.2 L Cavalier gives me an average comsuption of 10 km per liter of gas, and with stock filter gives me 9 km pero liter.
Hey MásAuto Mx, Very true, but you never really need extra HP when driving in city stop and go traffic. I wish I my car gave me similar fuel saving, but mine is about the same with or without
Motorvate DIY yeah I know! But in a standar transmission vehicule the trottle response with K&N is unestable all the time, the initial acceleration feels a high pull and inmediately goes down and it's going on up progressive, like a turbo lag sensation (obviously it's not turbo). Yeah, anyway K&N gives an agile sensation of driving but it's a response with pics and lows, and in the high acceleration the results are noticible. And with the normal filter the trottle is softer and smooth and stable from low rpm range. It's curious, what I do is to change the filters every month to have both sensations and don't get bored hahaha. :D
This is actually really impressive. I have never been a K&N fan, was going to get an AEM dryflow but there are many many many bad reviews on them... this may have just sold me on the K&N
Hey Joey McQuilkin, I have read good things about the AEM Dryflow. Maybe down the road I will get a set to test. As for the power gains, please keep in mind that every engine is different and has different designed goals. The engine in the G37, the VQ37VHR is designed to make maximum power at high RPM (7,100) so it requires lots of air. The lower restriction of the K&N allows a little more airflow and more power.
Nice! I added these to my 370z and only noticed a difference on the top end as it pulled. Made a slight difference for sure. Mostly noticeable top of 3rd and 4th.
Hey jolmeaki, Thank you! The interior is a surprising amount cooler in the summer as well. The 6 speed manual Sport sedans are very hard to find. Keep searching, they are worth it!
That hp gain alone makes changing your air filter worth it. Easy change that anybody can do. Makes me wonder why they don't just put a similar filter to the k and n in the engine from the factory
Hey gphillimo, I suspect the factory filter would do a better job of filtering in very dusty/dirty conditions. There is not much dust where I drive, so my used oil analysis shows that it is filtering well.
Hey rmp5s, Glad to help :) I will be going back to the dyno this spring for Part 2: K&N vs new Infiniti vs no air filters. I can't wait to see the data on this test!
Nice video. Just did this to my car . There's a bit more air intake noise similar to a CAI. And there's more torque down low. And I feel more power at the top end
Hey Dylan H, Nice find! In late August, I went back to the dyno and did a re-test. I am still analyzing the data and hope to get the episode out later this month.
You want to measure the air intake temperature. While the coolant temp plays a role in the engine temp scaler in the ECU, IAT is where the car will pull and it effects air density. This is the same across any motor.
Hey HybridNz, You are 100% correct! I have learned a lot since that video was shot (July 2016) When I re-test the filters (clean K&N, dirty K&N, new Infiniti filters and no filters) I will data log air intake temp, MAP, baro, TPS, injector pulse width, oil temp and a few others. I also built an air density calculator/data logger using an Arduino Uno and Bosch BME280 sensor to calculate the air density and density altitude during the test. (it also calculates J607 and J1349 correction factors. Also, I can data log the transmission and diff oil temp with another Arduino Uno and DS18B20 digital temp sensor. Can you think of anything else to data log?
Hey HybridNz, For Nissan/Infinti vehicles there are a few apps (Torque and OBD Fusion) that offer enhanced diagnostics and provides access to just over 200 manufacturer PIDs. That's how I datalog injector pulse width, engine oil temp, fuel temp, etc. This car has a factory wide band (air/fuel) sensor and I use that for data logging. At one dyno session I data logged the factory wide band and compared it to the tail pipe wide band. When I compared the ratios, the tail pipe wide band was just wrong! With WOT @ 3,500 it showed 14.0, the factory was as 12.0 Then is did a weird jump from 11.2 @ 5,000 RPM to 16.0 @ 5,500 then down to 9.5 @ 6,200. Maybe the shops sensor was messed up, or maybe the cat changed the oxygen level during the dyno run. I don't think you can trust an exhaust tip mounted wide band when the car has a catalytic convert.
The better test will be to compare the two, paper vs K&N as they get loaded with dirt over months of use. K&N claims to continue to flow better as paper air passages get clogged up.
Hey TornadoCAN99, That would be a good test, but I don't know how I would ensure an equal amount of dirt would be ingested between the K&N and paper air filter.
one way to prove or disprove, if given enought time on the dyno... 2 runs on the paper filters, followed by the k&n filters just like you did. then run the papers for 2 more runs, then back to the k&n so that way no one can bump their gums about a damn thing lol
The only flaw I can see was we have no idea how old the stock filters were. Maybe a new stock filter vs a new K&N would be better. Other than that great content.
Hey 01GTB Daily, You are 100% correct. For some reason I didn't think about that when the video was shot. I do plan on going back to the dyno for a re-test with a brand new Infiniti filter, used, K&N, dirty K&N and just for fun, no filter at all. I should be very interesting!
Hey William Scott, If you are talking about the paper air filters, I really don't know how old they were, since they were in the car when I bought it. There were a little dirty, but not dirty enough for them to need replacement. Looking back, I really should of used a new Infinti Filter... BUT I will fix that when I re-test the air filters on the dyno again.
It was very much a noticeable difference in HP/Torque gain for me! I was very surprised and pleased to be able to feel as much difference as I did with this change! Amazing! I just hope it doesn't damage my engine in the long haul like get too much particles passing thru this air filter or the oil damaging my expensive engine sensors!
I'm a youtuber with 900+ videos. A 2018 F150 with the 3.3 v6 make 290 hp. So if I put a K&N air filter in there. The engine will make more hp, per K&N. The problem I have with that is. The 2018 5.0 v8 make 395 hp and use the same stock air filter.
Hey blackericdenice, That is very interesting... as a rough calculation, if you multiply peak HP * 1.6 that will give you the cubic feet per minute of air required for that horsepower. So, for the v8, 395 x 1.6 = 632 CFM. The K&N filter (33-2385) flows up to 783 CFM @ 1.5 inches of water column pressure. As a rough guess, it looks like the filter in the 3.3 v6 is oversized as the v6 only needs 464 CFM. All manufacturers like to reduce the number of different parts as much as possible. It looks like the 3.3 V6 has a V8 sized air filter, but that is only my guess.
Love the videos, very scientific data driven approach. Keep doing the good work! I am building my G37S for SCCA F Street class, so I'm pretty much limited to the power mods that you've performed. I think I might do the same with before and after dynos, to see if I can recreate results with the same mods, but on 91 octane California gasoline.
Are you planning on doing a cold air intake on your car by any chance? I've got the K&N kit on my car at the moment, and it would be interesting to see how much more power it would make over stock intake and K&N drop in.
Hey D.M. No plans at this time ... I just don't have the budget. With the Canadian dollar right now, it would be about $800 for the kit, plus another $200 for the dyno. With the stock intake being a cold air intake, I am happy with the K&N panel filters for now.
Hey Sonny Haskins, You are welcome. Just make sure not to over oil the filter when you clean it. K&N's website will tell you how much oil to use under "Product Specifications" For the G37 it is 0.61 oz or 18 ml per filter.
It all depends on how the ECU/PCM/DME is programmed and the design of the engine. The engine in the G37 is designed to make high RPM power at the expense of fuel economy. Thanks for your comment!
@@MotorvateDIY Was going to go CAI, but this is much cheaper and just as effective. I'll probably either get the ark or stillen exhaust to go along with it :)
This is an extremely optimistic dyno. I don't know about those dyno results. I've never seen a g37 make that much torque at that low of an rpm and lose power at 7000 rpm's stock when that should be peak.
Hey Patrick Kudom, You may be right about the dyno... but I have just reported the numbers that it showed... However, I do plan on getting the car dynoed again at a different shop with a hub dyno. I will compare new K&N, used K&N, new Nissan filters, used Fram filters and no air filters. PLUS I will be monitoring differential oil and manual transmission oil temperature, and air intake differential pressure. It should be interesting! Thanks for your comment :)
It is easy to make a video.... it is very time consuming to make a good video. I think that episode was about 60 hours in editing, graphic creation and animation.
I had a K&N on my GTI VR6 and could not tell any difference at all with it in. Just an extra chore washing it, waiting for it to dry and oiling it again instead of just popping in a new one every time.
Hey Timothy Germann, Thanks for your comment. Based on my experience with my E39, I think the German cars have a better than normal intake system. and yes, they can be a pain to clean :)
Hey fwh79, The K&N filters do seem to work well on the G37 (or more specifically the VQ37VHR engine) In the late spring, I will be going back to the dyno for a re-test comparing a new Infiniti air filters, a K&N and just for kicks, NO AIR FILTER. I can't wait to see the results!
I used dual K&N filters on my previous car, the 2008 350Z with the VQ35HR motor. I changed the oil and sent a sample to Blackstone at 20K miles. The report came back as very high traces of metals, dirt, and particulates in the oil Blackstone asked if I was using K&N filters, to which I confirmed. They recommended that I change back to the stock paper filters. I sent the next oil change sample at 25K miles and the report returned much lower traces of invasive materials in the oil. The moral of this story? K&N definitely filters better and lets more air in but at the cost of higher traces of particulates. Meager power gains aren't worth the health of my engine so I have skipped K&N since then.
Hey GalvatronTypeR, Very interesting. Is your UOA posted anywhere? I would like to have a look at the details... Here are my used oil analysis reports: (1) th-cam.com/video/uvExyfxzsRo/w-d-xo.html (2) th-cam.com/video/cU8UMlMzi30/w-d-xo.html
I recently installed these panel filters into my Z. I noticed a difference in power for sure (good). I did not notice any difference in sound though (meh).
Made a 1.7 ho difference when we did it in my 2015 Civic Si sedan. A g37 also has duel intakes if I'm not mistaken, and those intakes have ALOT to do with the cars performance.
Hey DougE, My guess would be that the factory air filter is designed to work very, very well for that engine. Also a 3.7 litre engine @ 7500 RPM requires much more air than a 2.4 (approx 330 CFM @ 7100 RPM vs 537 CFM @ 7500 RPM) Anyways, your Si is a great looking car!
Motorvate DIY oh of course it requires more are then my 4cylinder. Just sharing what I got. But eventually (if more modifications are made) they end up producing a little more after a tune. My buddy Chris has the same white Infiniti might be a year older. But they sound great! I had a 370z for 24 hours. My moms friends husband let me take his out for 24 hours hahahaha. The rev matches are amazing I could imagine it with an after market exhaust.
I’m a little confused on the numbers. With the K&N filter you got an average of 300 hp? Why then if you look up the stock hp on a g37 it says 328 hp? And you can’t really compare the two numbers because the stock runs were at 6,600 RPM and the K&N filter runs were at 7,000 RPM. I don’t know too much about cars so please correct me if I’m wrong but if the cars at a higher RPM it’s obviously gonna produce more power. How can these tests be accurate? And why are the numbers much lower than the 328 hp stated all throughout the internet.
Hey Levi Stephens, Good question. You should read up on "wheel horsepower" and "engine crankshaft horsepower" The G37 has about 328 HP at the engine's crankshaft. That is measured with a engine dyno. Since I didn't want to remove the engine to dyno it on an engine dyno, a chassis dyno is used. This measures the power at the wheels. As you can guess, there are power losses (friction) as the torque goes through the transmission, driveshaft, differential, wheels and then gets to the roller where the power is measured. Typically, about 12-15% of the engines power is lost before it gets to the wheels.
I'll post this to the Fiesta ST group on Reddit and the so called experts come up with some reason why an aftermarket filter is a waste of money. I myself did notice improved throttle response after dropping in the filter, every little bit helps.
Hey spiritbuu, That is an interesting question. As it turns out yesterday I picked up a second set of used K&N filters. The K&N filters in my car have been in use for almost two years. I could clean and re-oil the the second set and the next time I am at the dyno, run the two back to back and see if there is any difference. I will add this to the production schedule for this year. Thanks for the idea!
The oil on the k&n can get onto the air sensor and can make your car run lean have a look at the mighty car mods vid titled pod filter mythbusted at 7:55 they talk about k&n filters but the whole video is worth the watch
Hey Ayrez Rc, Thanks for your comment. The only way oil leaves the K&N filters is if it is over oiled. Since I don't over oil them when I clean them, I have not had any issues in 32 years and over 500,000 KM in total K&N filter usage in 5 different cars and 1 motorcycle.
![The ULTIMATE Air Filter Test [Engineer Tested]](http://i.ytimg.com/vi/RdbFAG5xbyY/mqdefault.jpg)
![ละลาย (LALALYE) - DAOU PITTAYA ต้าห์อู๋ พิทยา [OFFICIAL MV]](http://i.ytimg.com/vi/wo6r9TgausI/mqdefault.jpg)
Finally a person who measures and doesn't believe any tales that float around.
Watched five vids about this topic and none of them presented any factual evidence. They all just talk about what they 'think' or 'believe'. Waste of time.
Thank you for doing it much better.
Hey Mick,
Thank you!
Please keep in mind, different cars/engines will get different gains.
The VQ37VHR engine in the G37/370 sure seems to respond well to a K&N filter.
Yeah, the gain for my 2.0l NA will be negligible. But the roarrr is worth the price :)
Hey Mick,
Ahhhh yes the roar can be delightful!! On my 95 Maxima with a K&N cone filter it was wonderful!
With the K&N panel filters, I don't hear anything :(
The K&N worked on my 93 240ZX. The VQ's don't respond well to mods though
Hey Stephen,
Hmmm, that has not been my experience.
My 95 Maxima (VQ30DE) picked up 14 HP with a y-pipe, 6 HP with a K&N cone and 5HP with a larger b-pipe. My G37 (VQ37VHR) also has done OK.
The KA24DE (same as your 240ZX) in my 99 Altima is stock, but maybe I should try a K&N on that.
What VQ engine/car didn't respond to mods and what were the mods?
I am interested to know more...
I don't understand all the hate this video is getting. do people not realize for spending $100 on 2 filters to gain 14 WHEEL hp is a fucking great deal. In most cases you're going to have to spend 5x-10x that amount on a catback to gain the same amount of hp. The whole idea behind this is just a comparison and I'm glad he posted it too.
Hey sk8punk318,
Thanks for your comment. People think I am paid by K&N and have lied about the results.
I do like K&N products, however I have only reported the data that I paid to collect (I purchased the filters used and paid for 2 hours of dyno time)
I had planned to go back to the dyno for a retest in October/November but my work schedule didn't allow it. Now I am planning on the spring.
This follow up test will include a NEW OEM filter, the used K&N and no filter. I think the results will be very interesting.
Motorvate DIY I used brand new paper filters (week old) and achieved the same results you did after replacing them with K&N drop-ins. I gained 13.36 HP It was 84 degrees here in Houston at the time.
Hey Bradly King,
Thanks for posting this! It is nice to have two tests with similar results.
Buy aftermarket filters once or buy OEM filters multiple times when they're dirty. They can possibly pay for themselves while the car being quicker and better mpg's. I always buy dry filters due to the MAF.
@@a98ctr62 were the old filters filthy?
14 hp for just a filter not bad
Yes, I was a little surprised... On my 95 Maxima a K&N cone filter with a Stillen velocity stack made 6 peak HP, and sounded fantastic at wide open throttle!
Motorvate DIY i drive a 12 cts coupe and they only sell a k&n thyphoon intake for this model but its an aluminum tube and the cone is not completely covered so im going to buy just the filter :)
Good decision!... and your gains may not be too far off the typhoon kit. PLUS your engine won't be sucking in HOT air from under the hood.
Motorvate DIY great video! Now i need to find one where they dyno a throttle body spacer hahah
Maybe you could be the first to dyno before and after?
Since the G37 uses two intakes and two filters, switching to K&N probably makes more of a difference than most engines. But damn 14hp just from a filter swap? I'm lucky if I get that out of an expensive cat back exhaust.
Darksyne wow exactly what i was going to say 👍minus the part about the cat back
That is a clean new change.... Go 5000kms with the KN, the air sucking pulls oil off the KN filter and coats your MAF. making engine performance and gas mileage MUCH worse.
TheKodiak72 negative only if you over oil it. Besides modern maf sensors are covered not exposed like the 90s.
What most people don't understand, is that you will get a small boost in hp & torque. But where you really feel the gains is in throttle response! I have noticed in my FX 35's response was 2 times quicker than before I installed my K&N stage 2 CAI system. Improved a couple points in mpg as well.
So the moral of the story with cold air intakes, is you get small/minuscule hp, torque & mpg gains, & dramatic throttle response gains! Add a performance mass air sensor, & a $600'ish high flow cat-back exhaust, & you will think you have a different engine under the hood.
Darksyne that's the opposite of how that works. Two filters means less flow needed per filter...therefore less of a difference.
This video convinced me to grab a pair of K&N filters for my G37 sedan. Maybe it's just a placebo effect but it does seem like the car has a bit more pep in its step in the mid-range power. I don't like to just hear "OMG buy this filter it'll make your car faster" but your video with real measurable results sold me on it. I think you made the right call on saying it's a worthy modification to do to your car. Thumbs up!
Hey Xternal,
Thanks for your kind words!
I am enjoying my K&N's as well. PLUS I love my Stillen exhaust :)
I put a pair on mine shortly after buying it 5 years ago and I knew it was a difference I just never measured it. But they're so plentiful nowadays on the internet you can get a whole kit for a hundred bucks. And it looks so much better than stock. And I live in Florida with 11 month Summers and have yet to have a problem with the heat coming off my engine into the motor. Easily the best $100 mod for this motor.
Dude actually says "maybe just a placebo effect", after just watching the dyno proof.
any problems yet? i heard that it ruins the engine long teem
term*
What a beautifully linear power line, and a nice constand torque, amazing. That is part of the charm of a natulally aspirated engine.
Hey Tim de Groot,
I agree with you, it is a great engine :)
I have both stock paper and K&N. Why do I have both? Bcz I use K&N and the days where I have to clean/dry/recoat oil/dry, but have to use my car, I would temporarily use paper filter for that day or two and then once my K&N filter is fully dry and ready to go, I will pop my K&N back in and keep my paper filter for nxt cleaning interval. I've cleaned my air filter 4 times, have roughly almost 200k miles. My paper filter is nearly as good as new still even till this day bcz I used it total of 5 days throughout 14 years.
EdDy4Rheelz... wow, that is a great idea. Thanks for sharing it!
Motorvate DIY Np. Thanks for showing the data. I use both but paper filter is only for temporary purpose. Data u showed + less hassle is the reason why kn is the way to go. Ppl make all these bs reasons to bash kn saying kn will destroy the engine. I used kn filter, my engine is almost 200k, not a single problem. I've maintained my car as optimal as possible. oil changing with quality synthetic oil, decent/good oil filter, flush out transmission fluid along with replacing spin on filter every time, replacing spark plugs to ngk laser iridium, bleeding and flushing brake fluids whenever I replace brake pads, changing cabin filter, flushing out coolant, but now, I bought kn cabin air filter yesterday. I am a proud kn filter owner. Stock products suck. Aftermarket quality products are the way to go. Your video and data proves my point.
I just bought 2 sets because I'm lazy
lmao or you just take an hour in the evening and do it...... #LOGIC
I do precisely that. Course I just have an old beater 2003 Saturn.
Remove air filter = 1000hp
The Raider 😀
2 weeks later, need new engine, due to dirt, bugs, & other shit gunking up your engine til it mutherfucking BLOWS!
Joel Williams but he had 2 weeks of fun! 😀
Joel Williams lmfao
Actually 0 bhp. Your car will stall if it sucks too much air. Common occurrence when you go to clean the system 😂😂
Great Video man I have used K&N air filters for over 12 years never had an issue. People don't realize how great they flow when dirty, and they over clean them. They also don't realize how little oil K&N puts on them at the factory.
Hey Ford ST,
I think you nailed it!
Just for kicks I will be going back to the dyno to re-test just to double check my results. It should be very interesting.
Ford ST dude my filter was oily as hell.
The first thing I do to my vehicles from my Camaro to my Acura. K&N panel filter. It really brings the engine to life with a deeper breathing scream. Thanks for proving the performance gain , they are great value
Hey Christopher Mott,
We have the same experience, they work for us :)
im actually shocked it put out that much more. I know what im gonna go get now!
Excellent empirical information!
Winston, thank you! I really enjoy analyzing data to uncover the information within.
great vid, I'm putting mine in on my G35 Sedan tonight! Also at 7000rpm it looks like you gained 19hp
Hey NightHawl0077,
I hope your gains are the same as mine.... Nissan's VQ engines really seem to respond well to intake/exhaust mods.
Good luck!
I beg to differ Motorvate..I got rid of my G37 as did my son with his 350Z. Mods did next to nothing for these cars and it's documented on myg37.com. I traded the G37 and picked up an 06 C6 Corvette and have never regretted it even after the lifter sand cam went south.
Hey Stephen,
That's interesting... I am all over myg37.com everyday and haven't seen any posts where people did an intake and exhaust and didn't measure a gain. I have no first hand knowledge on the 350Z, so I can't comment on that.
Would I trade in my G37 for a C6??? In about 2 heart beats, however I still need 4 doors for a while.
Enjoy your C6!
Did you see any gains? I just bought a 08 g35s, Thinking about a CAI, or just the K&N filters... I hear mix reviews on the CAI.
@@stephenr9194 Sir you're comparing a $5 000 G37 to a $25 000 corvette.......... of course you would rather have the vette, so would anyone else!!
Just got myself a Q40, these videos have helped me make the right decision on modifying on a budget!
Hey Mike Hilfigure,
Glad to hear! I hope you enjoy your Q as much as I enjoy my G :)
Great visual on the graphs
Hey hectoronthemoon,
Thanks for your kind words. Since I am learning Adobe After Effects that gray only took 3 days to organize the data and animate.
All just for you :)
You sir, are the car hero we all need. If K&N had any sense, they’d have you do a video for everyone of their top sellers
Thanks! From what I have seen, not all engines respond this well to a K&N. BUT I'm glad it did in my G37 :)
Top video! A fair comparison which seems to answer the age old question. This is better myth-busting than MCM!!! More power could probably got with a re-tune too :-)
Phil, thank you!!
The problem I have with getting a tune is the cost!! It would be about $800 Canadian for maybe 10-15 HP.
That $800 dollars gets me closer to a new 4K camera :)
Watched your video and decided what the hell im going to buy some. They were about $130 for both and i thought it was pricey. Intsalled them in the parking lot then went home. Wow! i actually feel the power. I have a heavy foot so im always above 5000RPM and man what a difference
K&n ruined my mass air flow sensor. Over time, the oil comes off the filter and up into the air intake, and I did not over oil this thing. Also, I noticed you can see holes through the filter, kind of like looking through a screen. I'm sure it has better air flow, but does not work as good as a filter.
I understand what you are saying about how easy it is to see through the K&N filter, it does look like it is full of holes! As for the ability to filter the air, I will be getting my used oil analyzed this will and will have a look at the results. (typically silicon (sand) is high (> 30 parts per million) if the filter is not working well. I hope to change my oil this week and take in a sample.
I had a K&N cone filter on my 99 Maxima for just over 300,000 Km it didn't have an issue. I suspect newer cars might have more sensitive air flow meters.
I've had a K&N filter on my 2000 Nissan Maxima for 16 years, up until last year. I had a Blackstone oil analysis done and my silica levels were in the 100's. I changed back to paper recently, in the past 6 months, and will do another oil analysis to see if the silica drops, which I think it will. I don't think it's adversely affected my car, although I did have to replace my mass air flow sensor like constatbuzz above. I have since, in the last 2 weeks, given my Maxima to my 15 year old son and purchased myself a 2013 G37xS. I'm ecstatic...
Wow, 100 PPM iv VERY high for silica! (sand). The next episode (March 3) I will be showing my used oil analysis of 6 months with a paper filter vs 6 months with the K&N.
Sorry, I miss spoke about the silica levels. The number is actually 26, with 14 being the average so they are still high. I was trying to figure out how I could post my report but haven't been able to just yet.
Those are much better silica numbers. It is my understanding anything under 30 parts per million (ppm) is OK. It will be interesting to compare my 6 month used oil analysis with the K&N with yours.
Old video but this is insane! Thank you honestly. Been wanting the filters just didn't know if it was really worth it.
Hey adrian castillo,
I do find it hard to believe that was almost 4 years ago!
AND those same air filters are still in my car and haven't been cleaned yet.
Have a look at the 50,000 KM update from last year:
K&N Filter Test… Two Years and 50,000 KM Later: Motorvate's DIY Garage Ep.34
th-cam.com/video/7D9lJxQ1s-U/w-d-xo.html
@@MotorvateDIY thats awesome! Definitely my next purchase👍🤙
The Takeda single filter cai comparison to stock would be a great video .
Yes that would be interesting and could be made into a 3 way comparison (paper, K&N panel and Takeda)
Unfortunate, my budget for this year won't allow it. :(
Motorvate DIY
i already car shop machine dyno compared k&n vs stock. so i already knew k&n made more power on same day dyno few minutes apart. also my butt dyno, cold air intake made more top rpm torque vs k&n short intake which made more torque @ lower rpm.
I like this guy straight to the point no bullshit
Hey Guivensthecar guy,
Thanks! Once the funds are in place, I will be going back to the dyno for a re-test. BUT this time using brand new Infiniti filters, used K&N and even no air filter. It should be interesting seeing what the data shows!
@@MotorvateDIY alright
I like the stupid voice you made in 2:26 😂😂😂
Hey Ali Ben Ashour,
That was my mini tribute to Jeremy Clarkson. He would make a stupid voice like that when he would imitate "haters" talking. Thanks for noticing!
I'm just joking you're making good job 😂
Thanks for this very helpful video. Lots of people (formerly me included) believe an aftermarket air filter adds maybe 1 or 2 hp gain and your video gave a very solid evidence it does much better. Best way to admit my wrong is to just go and spend my money to prove I'm a believer and, thanks to you, I have!
Hey Asad S,
Thanks for your comment.
Please keep in mind that every car/engine will respond differently, but in the example of the G37/370z the engine responds well :)
Even the engine has a nice tune to it now lol . I'm getting one for my 3100 V6 Malibu .
It's the cleanliness that counts. Were you using a brand new paper filter?
Hey Nick Amarit,
That is where I messed up... I used the filter that came with the car when I bought it.
However, I will be going back to the dyno with a brand new Infiniti air filter for a re-test.
I will compare a clean K&N, dirty K&N, New Infiniti filter and a few runs without an air filter
AND data log coolant & oil temps and a few others.
Stay tuned for the update!
@@MotorvateDIY Use your standard filter the K N is not worth extra money you pay for them stay with what ever your make tells you to use ,And dont fall for the nitrogen in your tyres scam its big scam .
Hey goldwingman1500,
I am comfortable with the K&N filters and have used them for over 30 years with a combined total "K&N filter" mileage somewhere around 500,000 KM on 5 different cars and 1 bike., without any issues.
Have you had a failure of something due to a K&N filter?
Don't forget, since the filters can be cleaned, they will save you money in the long run.
The G37 uses 2 air filters and they are $30 each at the dealer or $25 for after market.
Two K&N filters are about $120 US / $160 Canadian. After 3-4 years of use, the K&N filters are paid for and SAVE me money.
As for nitrogen in the tires I get the "econo 78" nitrogen.... you know the 78% version :)
@@MotorvateDIY all air cleaners as lons as there clean stay with your normal Filter bugger K,N Filters are over priced and change you air cleaner oil filter and will have no trouble ( hope)
@@goldwingman1500 I've used K&N filters buddy. They are better than the cheap paper ones. And in the long run it's lower in cost.
I have switched all my vehicles to K&N filters. They make a seat of the pants difference in my GM 8 cylinder engines.
I feel the same... It isn't a lot, but it is a little different in a nice way :)
If you stuck on the included K&N sticker it would of added an additional 15hp
Hey DoomFinger511,
BUT, if you do that, then everyone will know and no one will want to race you :)
My K & N filter on my 2ZZ-GE really made a huge diff! I’d guess like 3-4hp gain and I felt all of the gains at 4000-5500rpm, right in the toque dip zone! I also cut a cutout in my bumper to work with the oem airbox cold air setup and THAT gave me legit 5-10whp!! That bumper cutout changed the way this lil 1.8 liter engine breathes!!!
Hey cxbra,
I'm glad it worked for you.... but cutting a hole in the bumper is a little to extreme for this old guy :)
1:06 "aboot"
Hey BestOnlineGamer: Shhh, don't let everyone know I am from Canada, eh? :)
Finally someone explained and showed this in simple terms😂 people always say filters dont make a difference
Thanks for your comment.
As for power gains, it really depends on the design of the intake and engine.
For the engine in the G37/370, it does like to breathe deep and anything to help that does make more power.
He said “Nee-San” haha
Hey David Michael,
Yup, that is how we say it in Toronto. :)
I like it. Knee-San
I bought a KNN filter for my wife’s 2016 tracks in the car typically got between 30 to 33 miles per gallon in the city after installing the KNM filter our gas mileage dropped to 26.5. I thoroughly cleaned it real oiled it put it back in and gained 1/2 mile per gallon to 27. I took the filter out put it back in the box and put a GM AC Delco paper filter back in it.
Interesting... That's good to know, thanks for sharing!
all the sooks comparing prices and other sooks crying about maf sensor etc, im just here buying a new k&n each time mine gets dirty, self oiling never turns out like factory pre oiling.
Hey Kemal Keza,
You just might be on to something here. BUT since my pockets are not a deep as yours :), I just need to be VERY careful when oiling them and spray less then you think you need.
I live by this. I throw out used ones no matter what! They are junk when used after 50,000 miles i wont lose sleep tossing it out
Straight forward and honest. Extra points for the nailing the antagonists. New subscriber🍺
Thanks for subbing!
here's a secret, rip the filter out of your car and you'll gain more HP than anything they sell on the market! and its fucking free!
Nutjob Joe, I will do it if you do it :)
Actually some cars loose power without an air filter, if they have mass air flow fuel injection. When the air box doesn't have a filter, the air turbulence is much greater and confuses the mass air flow sensor. As a result, it does not provide the correct signal to the ECU and the fueling is incorrect.
Nutjob Joe You'll also toast your engine. I'm a motorcycle mechanic and have seen first hand numerous times how dirt in your engine leads to failure. Use an air filter, unless you have more money than sense and can rebuild your engine whenever it shits the bed because of dirt in the combustion chambers.
I thought it was common knowledge that KN air filter are less restrictive compared to stock. It's why the oil is needed, to catch the fine dust particles. I have one running in a 5.0 super charged V8 and I just did a clean and re-oil on mine to find not one bit i dust in the air tubes leading into the super charger had been let through. These air filters work if oil and maintained correctly.
We have the same experience... They work for us :)
“Sponsored by K&N”
Hey Dman 1990,
Nope... it was sponsored by me.
Hmmmph… Dbag 1990 had to throw in his two cents to get his troll points.
Finally someone shows proof. Great job and thank you for posting!
Hey Brian Koncyk,
Thanks... Now I just want to point out that not engines will respond the same way as this one.
It depends on the design and if the engine computer (ECU) can take advantage of the additional air flow.
In the case here, the VQ37VHR and the K&N work very well :)
@@MotorvateDIY Great job!
Thanks. In the next few days a new episode will be out showing how well the K&N filter is working after 2 years and 50,000 KM or 31,000 miles.
@@MotorvateDIY I will check it out. Thanks!
Thanks for posting this video. I just ordered a
Z1 Silicone Post-MAF Intake Hoses and k&N drop in's. I'm going to clean out the throttle body to help improve performance when I do the installation.
Hey lazy1972,
They should work well...
Cleaning the throttle body is a very good idea. Actually that is an episode that is in post production right now and should be posted in the next few weeks.
Make sure you do the three procedures that the factory manual tells you to do. They are easy and prevents a high idle.
Good practical test. We dont ride around with new filters, and a slightly used one is fine. Test was legit and the results are fact.
Hey Jay Hale,
Hmmm... I though comparing a slightly used filter to a freshly cleaned K&N wasn't an "apples to apples" test, BUT you raise a very good point!
I am planning on going to a different dyno to retest. This time with a brand new Infiniti filter, used K&N, freshly cleaned K&N and just for kicks no filter at all. I hope to get to the dyno in January.
Thanks for your comment :)
Hi, I live in Brazil and I have a 12/12 nissan tiida, I acquired a sports air filter (national), with the high performance polyurethane foam material, it has in theory the same kind of k & n maintenance, we use for the process neutral detergent and after washing, we greased the same mineral oil (Vaseline). I did the maintenance of it already 3 times, in the last I exagerei in the oil and my car came to give the light of engine anomaly, code (sensor maf p0102). From the first moment I thought that I had damaged the sensor, however I did the cleaning with a clean electric contact and now working and apparently the engine seems more round (obs: in the cleaning I saw that the air box also had a lot of oil and I cleaned it too she). As I had this problem with the oil exagerate, it is justified that in maintenance we have to be careful and not exaggerate in the oil, otherwise the maf sensor would certainly have suffered, over time.
I was asking me if putting k/n filters worth it. You gave me my answer. Thanks for your videos.
Thanks for your comment!
I do think they are worth it... and in a follow up episode (to be released in the summer) I will be re-testing the stock - vs used K&N - vs new K&N - vs used paper filter - vs NO AIR filter on a different (and more accurate) dyno :)
Wow! Thanks for the video. I think I’ll skip out on CAI and just buy some filters and achieve similar if not the better performance!
Plus I won’t have to worry about sucking up water!
In many cases, the stock intake is well designed for air flow and designed to handle heavy rains.
When I see a cone filter behind the grill, I honestly worry about what can happen in heavy rain to that engine.
Everyone knows a cooler motor makes more horsepower than when warmer engine. Liked your video
Hey Michael Mennes,
Thanks for your kind words... and I agree cooler air does make more power.
You got a new fan! Great testing and information! Keep up the good work sir!!!
Hey tbbsrr,
Thanks! I am planning on going back for a re-test. This time comparing brand new Infiniti filters, dirty K&N, clean K&N and no filter at all.
It should be very interesting!
Very impressive results. Can't wait to install one on my Miata.
No harm in trying... and if you can do a used oil analysis you will know how well it is working for you :)
It may not produce much HP gain, but it certainly allows more air into the engine whilst still providing excellent filtration.
An aftermarket filter only pays dividends on more highly tuned vehicles, that can benefit from more air into the engine.
On a standard vehicle you will see little return, other than the ability to clean and reuse the filter.
It really depends on the design goals of the engine.
On the 370z/G37 the engine makes peak power at 7,000 RPM so it is designed for high air flow. Anything to reduce intake restriction will result in less pumping loss, which makes more power.
I've watched several of your videos now. I don't have the know how or the tools to do most of the work you're doing but I just swapped my air dirty air filters with paper ones. Now I'm wondering if I should replace them with K&N. Thanks for your video. I'm amazed at how professional they are! Your camera angles and audio quality and even your video introduction. Very impressive!!!
One thing I didn't mention in the video is the cost savings of the K&N filters. Two K&N filters cost about $120, and since they can be cleaned and re-oiled, they will last 10+ years. Two paper filters are about $40. The K&N filters are paid for after three paper air filter replacements. ($40 x 3 = $120, the same cost of the K&N filters)
Thank you for kind comments on the quality, I am glad you noticed. :)
Bill Irish I bought them after i saw this video, put it this way if you want more power buy them
Now a days newer cars are designed pretty well and pretty much already have a "cold air intake" and improvement is normally minimal at best. For $100 and just a filter swap....thats pretty legit. Ive run K&N's since i started driving 20 years ago. NEVER had any issues. Looking to buy a G37 this weekend possibly. I know what ill be doing first lol.
We have the same experience... My first K&N was for my 1986 Taurus and I have used them ever since.
Good luck on the G37 purchase. Just make sure to check oil pressure to make sure the oil gallery gasket isn't leaking.
At 80C/176F you should have > 14 psi. Anything less is a concern.
Good luck!
I've used these filters for years. Never any problems and usually got better Mpg's. of you get gains then look at it as a bonus. Non more replacing pricey filters all the time. I just bought 2 for my q60. Pretty cheap mod for 14 horsepower.
Hey Bizzenn1976,
My first K&N filter was in my 1986 Taurus and I have used them ever since.
I've always used them and always felt a slight improvement. Not 14hp but 3 to 5 hp for sure.
Hey Mcufre,
Every engine/ECU will respond differently. The G37's engine (VQ37VHR) has TWO air boxes/throttle bodies, has variable valve timing, variable valve LIFT and revs to 7,500 RPM. This engine is designed to breathe and so it responds very well.
Other engines/ECUs may not be able to take full advantage of the "potential" additional air flow.
NIce. We did similar tests on 1.8 liter Miata's, 1000cc Yamaha and Suzuki's. We compared K&N to foam pods on the bike engines. In each case we saw 7 to 9 % gains with oiled K&N.
Hey Thai Gyro,
Thanks for you comment. Have you done any testing with the newer "dry" style filters?
As you know, many people are worried about the oil in the filter hurting the MAF sensor.
Not specifically for MAF failure testing. In the past, we have seen tests results from K&N and a few others. We believe that the conclusions clearly show no failures due to K&N oil contamination. Urban legend is not an accepted form of data, for us. When we do expensive testing, like dyno runs, we ensure proper sequences to avoid speculation. We prefer oiled cotton, like K&N over dry. Both can work fine, but we do a lot of dual sport and motard bike engines, so get into dusty conditions, where the oiled cotton, we believe, protects better. Never experienced a MAF sensor failure due to filter type...most sensors fail due to design style or simply manufacturing defects. Hot wire MAF's are delicate, but a good one will last many years, if the entire system is well maintained. The real contamination problem that we see, comes from either the PCV systems performance or the fuel tank vent/vapor system failures. Often, these use shared plumbing, adding to diagnosis complications.
Hey Thai Gyro,
Thanks for sharing your first hand experience on this. I have had the same experience.
I guess the 85 dollars I spent on one for my 03 ninja 250 isn't going to be money wasted!!! Thank you for the review sir!!!...💯✊
Ummm.... A 250cc motorcycle engine has very little in common with a 3696cc car engine. Let me know how it feels to you.
Got one in my 2019 Mazda3 hatchback. If it gained 7whp, it's worth the 50 bucks. The noise alone is worth it because the Mazda3 is engine bay is so insulated. Cork Sport sells an intake system for $200. It's a short ram which draws in hot air and makes 5-7whp. I bet the K&N with the stock box is just as good or even better since it draws in colder outside air.
I have a K&N air filter housing and filter. I'll be honest it's a pain in cleaning and adding a really thin layer of K&N oil. I usually park my truck for the day and put it in the next day just so the really thin oiling has absorbed/semi dried so the wet oil on the filter doesn't screw with my sensor and bugger it up.
Horse power gain hardly noticeable.
Too much work involved with a K&N air filter in my opinion, considering when buying a disposable you quickly put it in and eventually toss it and buy another, it's time saving.
I do recommend if you do go with K&N kits buy another filter to have previously oiled and ready so you can just toss it in without the wait. I also noticed too that the filter get's dirtier faster which is contributed by thin layer of oil in my opinion which requires more frequently cleaning and going through the process again.
I agree, cleaning the K&N is a little bit of a pain. However, I have been doing that since my first K&N filter in my 88 Taurus.
Great video. Instant like. Much appreciated! Can’t wait to install these right now!!!!
Thanks for the comments... I like them and still have the in the car.
@@MotorvateDIY if you ever have the time or money, maybe doing something with the silicone intake tubing, that would be great! Love the video man. Lots of clean information
I picked up a pair because of this video for my qx70. Thanks!
I still love mine :)
I was waiting for you to be like " meaww see! K&N drop in see" lol. Props to ya man. Great empirical data for sure.
Hey JauntyBishop,
Thanks for your kind words. I am planning on going to a different dyno and do a re-test. This time I will have brand new Infiniti air filters, used K&N, freshly cleaned K&N and just for kicks, a few dyno runs without an air filter.
@@MotorvateDIY also, would you be to test the Green Filter vs K&N? Seems like the Green Filter have gained a lot of recognition over the years. Be an interesting comparison since your test are completed with minimal variables, and accuracy is on point.
Hey JauntyBishop,
Good idea, but when I went to their website, they don't have a filter for the 370Z/G37.
I don't understand where all your dislikes came from. I thought it was a very nicely put together video and very informational.
Thanks for the comment. As I have found out, talking about K&N filters is a controversial topic and opinions are strong and very divided.
All I wanted to do, is to show the results I got... and I have :)
The bad thing about this is that you gain torque and hp but it performances at a higher rpm, and in a city use or always low rpm use it doesn't works too much because you're not always driving at 5000 or 6000 rpm. I have to say that it really saves fuel, for my 2.2 L Cavalier gives me an average comsuption of 10 km per liter of gas, and with stock filter gives me 9 km pero liter.
Hey MásAuto Mx,
Very true, but you never really need extra HP when driving in city stop and go traffic.
I wish I my car gave me similar fuel saving, but mine is about the same with or without
Motorvate DIY yeah I know! But in a standar transmission vehicule the trottle response with K&N is unestable all the time, the initial acceleration feels a high pull and inmediately goes down and it's going on up progressive, like a turbo lag sensation (obviously it's not turbo). Yeah, anyway K&N gives an agile sensation of driving but it's a response with pics and lows, and in the high acceleration the results are noticible. And with the normal filter the trottle is softer and smooth and stable from low rpm range. It's curious, what I do is to change the filters every month to have both sensations and don't get bored hahaha. :D
This is actually really impressive.
I have never been a K&N fan, was going to get an AEM dryflow but there are many many many bad reviews on them... this may have just sold me on the K&N
Hey Joey McQuilkin,
I have read good things about the AEM Dryflow. Maybe down the road I will get a set to test.
As for the power gains, please keep in mind that every engine is different and has different designed goals. The engine in the G37, the VQ37VHR is designed to make maximum power at high RPM (7,100) so it requires lots of air. The lower restriction of the K&N allows a little more airflow and more power.
@@MotorvateDIY i have the AFE dry flows so id be interested to have a dyno comparison between them and the K&N
Hey Joe Smith,
If someone would send me a pair, I would buy the dyno time and do a back to back test.
Amazing results, great video!
Hey Randy Green,
Thanks! I am looking forward to the re-test in the late spring to see if there are any differences.
Nice! I added these to my 370z and only noticed a difference on the top end as it pulled. Made a slight difference for sure. Mostly noticeable top of 3rd and 4th.
Thanks for the feedback... I noticed the same thing :)
Love the white G37s. Was looking for one with black leather and manual transmission rwd. Can't seem to find the manual transmission for the sedan.
Hey jolmeaki,
Thank you! The interior is a surprising amount cooler in the summer as well.
The 6 speed manual Sport sedans are very hard to find. Keep searching, they are worth it!
That hp gain alone makes changing your air filter worth it. Easy change that anybody can do. Makes me wonder why they don't just put a similar filter to the k and n in the engine from the factory
Hey gphillimo,
I suspect the factory filter would do a better job of filtering in very dusty/dirty conditions. There is not much dust where I drive, so my used oil analysis shows that it is filtering well.
This video wins the Internet. I was going to make this exact video...thank you for saving me the trouble!!
Hey rmp5s,
Glad to help :)
I will be going back to the dyno this spring for Part 2: K&N vs new Infiniti vs no air filters.
I can't wait to see the data on this test!
Nice video. Just did this to my car . There's a bit more air intake noise similar to a CAI. And there's more torque down low. And I feel more power at the top end
Hey Haris Wadud,
I'm glad you like them :)
just bought one on ebay with damaged box and new for 20$ free shipping so definitely glad i purchased one should be here tomorrow morning
Hey Dylan H,
Nice find! In late August, I went back to the dyno and did a re-test. I am still analyzing the data and hope to get the episode out later this month.
You want to measure the air intake temperature. While the coolant temp plays a role in the engine temp scaler in the ECU, IAT is where the car will pull and it effects air density. This is the same across any motor.
Hey HybridNz,
You are 100% correct! I have learned a lot since that video was shot (July 2016)
When I re-test the filters (clean K&N, dirty K&N, new Infiniti filters and no filters) I will data log air intake temp, MAP, baro, TPS, injector pulse width, oil temp and a few others.
I also built an air density calculator/data logger using an Arduino Uno and Bosch BME280 sensor to calculate the air density and density altitude during the test. (it also calculates J607 and J1349 correction factors.
Also, I can data log the transmission and diff oil temp with another Arduino Uno and DS18B20 digital temp sensor.
Can you think of anything else to data log?
Hey HybridNz,
For Nissan/Infinti vehicles there are a few apps (Torque and OBD Fusion) that offer enhanced diagnostics and provides access to just over 200 manufacturer PIDs. That's how I datalog injector pulse width, engine oil temp, fuel temp, etc.
This car has a factory wide band (air/fuel) sensor and I use that for data logging.
At one dyno session I data logged the factory wide band and compared it to the tail pipe wide band.
When I compared the ratios, the tail pipe wide band was just wrong! With WOT @ 3,500 it showed 14.0, the factory was as 12.0
Then is did a weird jump from 11.2 @ 5,000 RPM to 16.0 @ 5,500 then down to 9.5 @ 6,200.
Maybe the shops sensor was messed up, or maybe the cat changed the oxygen level during the dyno run.
I don't think you can trust an exhaust tip mounted wide band when the car has a catalytic convert.
So glad I found your channel. Great video
Hey RoundHouseSlap,
I'm glad you found it too :)
I am on witch hunt to see will k&n filters be any improvement for my 90HP volvo. You sir just earned yourself an subscriber.
Hey Radijacija,
I wish you luck on your hunt for more power!
Thanks for subscribing :)
The better test will be to compare the two, paper vs K&N as they get loaded with dirt over months of use. K&N claims to continue to flow better as paper air passages get clogged up.
Hey TornadoCAN99,
That would be a good test, but I don't know how I would ensure an equal amount of dirt would be ingested between the K&N and paper air filter.
one way to prove or disprove, if given enought time on the dyno... 2 runs on the paper filters, followed by the k&n filters just like you did. then run the papers for 2 more runs, then back to the k&n so that way no one can bump their gums about a damn thing lol
AAAAHHHAAAA!!! You used K&N drop in filters! THAT's how you made more power!
LOL
Hey Vince Fernandez,
Yup! The stock intake on the G37 is very well engineered. The air intake is in front of the the rad, just behind the front grill.
+Motorvate DIY
AAAAAHHAAA!!! The Infiniti designers located the air intake in FRONT of the radiator ...THATS how you made more power!
Boy I sure am slow... I just figured out your post were "spoken" in my "hater" voice. Too funny!
The only flaw I can see was we have no idea how old the stock filters were. Maybe a new stock filter vs a new K&N would be better.
Other than that great content.
Hey 01GTB Daily,
You are 100% correct. For some reason I didn't think about that when the video was shot.
I do plan on going back to the dyno for a re-test with a brand new Infiniti filter, used, K&N, dirty K&N and just for fun, no filter at all.
I should be very interesting!
If you read all the comments you would have known they were 1 week old.
Hey William Scott,
If you are talking about the paper air filters, I really don't know how old they were, since they were in the car when I bought it.
There were a little dirty, but not dirty enough for them to need replacement.
Looking back, I really should of used a new Infinti Filter... BUT I will fix that when I re-test the air filters on the dyno again.
I was expecting 3-4 hp and 5 tq. I'm Impressed that it works as well as it does.
Please keep in mind, every vehicle will respond differently, so you won't get the same gain in a 1.0 Suzuki Swift :)
It was very much a noticeable difference in HP/Torque gain for me! I was very surprised and pleased to be able to feel as much difference as I did with this change! Amazing! I just hope it doesn't damage my engine in the long haul like get too much particles passing thru this air filter or the oil damaging my expensive engine sensors!
I'm a youtuber with 900+ videos. A 2018 F150 with the 3.3 v6 make 290 hp. So if I put a K&N air filter in there. The engine will make more hp, per K&N.
The problem I have with that is. The 2018 5.0 v8 make 395 hp and use the same stock air filter.
Hey blackericdenice,
That is very interesting... as a rough calculation, if you multiply peak HP * 1.6 that will give you the cubic feet per minute of air required for that horsepower. So, for the v8, 395 x 1.6 = 632 CFM. The K&N filter (33-2385) flows up to 783 CFM @ 1.5 inches of water column pressure.
As a rough guess, it looks like the filter in the 3.3 v6 is oversized as the v6 only needs 464 CFM.
All manufacturers like to reduce the number of different parts as much as possible.
It looks like the 3.3 V6 has a V8 sized air filter, but that is only my guess.
You should see what the whole k&n system does. Gained 20 ftlbs of torque and about 15 “usable” hp on my 03 expedition 4.6l
Hey hugo salazar,
Wow, those are very nice gains!
Love the videos, very scientific data driven approach. Keep doing the good work! I am building my G37S for SCCA F Street class, so I'm pretty much limited to the power mods that you've performed. I think I might do the same with before and after dynos, to see if I can recreate results with the same mods, but on 91 octane California gasoline.
Hey D.M.
Thanks for your kind words!
Right now I am editing the next episode to be released tomorrow: E18 Checking Oil Pressure.
I'm subscribed! You should check out my channel as well, I've got a few autoX videos of my G37 already.
Are you planning on doing a cold air intake on your car by any chance? I've got the K&N kit on my car at the moment, and it would be interesting to see how much more power it would make over stock intake and K&N drop in.
Hey D.M.
No plans at this time ... I just don't have the budget. With the Canadian dollar right now, it would be about $800 for the kit, plus another $200 for the dyno.
With the stock intake being a cold air intake, I am happy with the K&N panel filters for now.
Great video.....now I know im not just dreaming with the K n N....thank you.
Hey Sonny Haskins,
You are welcome. Just make sure not to over oil the filter when you clean it. K&N's website will tell you how much oil to use under "Product Specifications"
For the G37 it is 0.61 oz or 18 ml per filter.
+6tq and 14hp is insane for a filter. I've seen CAIs give less gains than that. Very cool.
It all depends on how the ECU/PCM/DME is programmed and the design of the engine. The engine in the G37 is designed to make high RPM power at the expense of fuel economy.
Thanks for your comment!
@@MotorvateDIY Was going to go CAI, but this is much cheaper and just as effective. I'll probably either get the ark or stillen exhaust to go along with it :)
Sounds like a good plan :)
This is an extremely optimistic dyno. I don't know about those dyno results. I've never seen a g37 make that much torque at that low of an rpm and lose power at 7000 rpm's stock when that should be peak.
Hey Patrick Kudom,
You may be right about the dyno... but I have just reported the numbers that it showed...
However, I do plan on getting the car dynoed again at a different shop with a hub dyno. I will compare new K&N, used K&N, new Nissan filters, used Fram filters and no air filters.
PLUS I will be monitoring differential oil and manual transmission oil temperature, and air intake differential pressure. It should be interesting!
Thanks for your comment :)
Thank u for supporting good things
Hey Nawaf Alsarra,
No problem. My first K&N filter was on my 83 VW GTi and I still use them today :)
Sick!! I bought these not knowing they actually give extra power.😎🤘
A month later, what do you think of them?
@@MotorvateDIY They perform great!
Production Value 💯 👏
Hey American Monster,
Thanks for noticing :)
@@MotorvateDIY I work in an autobody shop and these type of videos pop up now and then but few as well done👍
It is easy to make a video.... it is very time consuming to make a good video. I think that episode was about 60 hours in editing, graphic creation and animation.
I had a K&N on my GTI VR6 and could not tell any difference at all with it in. Just an extra chore washing it, waiting for it to dry and oiling it again instead of just popping in a new one every time.
Hey Timothy Germann,
Thanks for your comment. Based on my experience with my E39, I think the German cars have a better than normal intake system.
and yes, they can be a pain to clean :)
Those are some solid gains. The filter set up on this car looks like it is super easy to change. Asians = super smart!
Hey fwh79,
The K&N filters do seem to work well on the G37 (or more specifically the VQ37VHR engine)
In the late spring, I will be going back to the dyno for a re-test comparing a new Infiniti air filters, a K&N and just for kicks, NO AIR FILTER. I can't wait to see the results!
Should be interesting. I will be watching when that video drops!
Should have tried another run with a clean air filter. I've seen mustangs k and n gain over a dirty air filter then lose to a stock clean one.
I just might do that later this year.
Motorvate DIY thanks for the consideration and reading my comment. I'd like to see the result.
I used dual K&N filters on my previous car, the 2008 350Z with the VQ35HR motor. I changed the oil and sent a sample to Blackstone at 20K miles. The report came back as very high traces of metals, dirt, and particulates in the oil Blackstone asked if I was using K&N filters, to which I confirmed. They recommended that I change back to the stock paper filters. I sent the next oil change sample at 25K miles and the report returned much lower traces of invasive materials in the oil.
The moral of this story? K&N definitely filters better and lets more air in but at the cost of higher traces of particulates. Meager power gains aren't worth the health of my engine so I have skipped K&N since then.
Hey GalvatronTypeR,
Very interesting. Is your UOA posted anywhere? I would like to have a look at the details...
Here are my used oil analysis reports:
(1) th-cam.com/video/uvExyfxzsRo/w-d-xo.html
(2) th-cam.com/video/cU8UMlMzi30/w-d-xo.html
Motorvate DIY I no longer have the car and I included the UOA reports with the service records to the new owner.
OK, thanks for getting back to me.
Thanks for solving the age old question. subscribed
Hey fc8697syp,
You are welcome and thank you for subscribing.
I have used k&n filter for years. No problems. I do drive a Lexus though. Very hard to kill.
Hey stormrider777,
Thanks for your comment... we have had the same experience: They work and save money, since they can be cleaned over and over.
I recently installed these panel filters into my Z. I noticed a difference in power for sure (good). I did not notice any difference in sound though (meh).
Hey NVSTRZ34,
We have the same experience... I was also hoping for a little more intake growl and there isn't any :(
Anyways, enjoy your Z :)
very good job, i always wondered if i did the right thing paying the extra money on a K&N air cleaner,, now i know it was,, thank you.
Hey motmot welch,
Thanks for your kind words :)
Great Editing. Thank you for this info
Glad it was helpful!
Made a 1.7 ho difference when we did it in my 2015 Civic Si sedan. A g37 also has duel intakes if I'm not mistaken, and those intakes have ALOT to do with the cars performance.
Hey DougE,
My guess would be that the factory air filter is designed to work very, very well for that engine.
Also a 3.7 litre engine @ 7500 RPM requires much more air than a 2.4 (approx 330 CFM @ 7100 RPM vs 537 CFM @ 7500 RPM)
Anyways, your Si is a great looking car!
Motorvate DIY oh of course it requires more are then my 4cylinder. Just sharing what I got. But eventually (if more modifications are made) they end up producing a little more after a tune. My buddy Chris has the same white Infiniti might be a year older. But they sound great! I had a 370z for 24 hours. My moms friends husband let me take his out for 24 hours hahahaha. The rev matches are amazing I could imagine it with an after market exhaust.
I’m a little confused on the numbers. With the K&N filter you got an average of 300 hp? Why then if you look up the stock hp on a g37 it says 328 hp? And you can’t really compare the two numbers because the stock runs were at 6,600 RPM and the K&N filter runs were at 7,000 RPM. I don’t know too much about cars so please correct me if I’m wrong but if the cars at a higher RPM it’s obviously gonna produce more power. How can these tests be accurate? And why are the numbers much lower than the 328 hp stated all throughout the internet.
Hey Levi Stephens,
Good question.
You should read up on "wheel horsepower" and "engine crankshaft horsepower"
The G37 has about 328 HP at the engine's crankshaft. That is measured with a engine dyno.
Since I didn't want to remove the engine to dyno it on an engine dyno, a chassis dyno is used. This measures the power at the wheels. As you can guess, there are power losses (friction) as the torque goes through the transmission, driveshaft, differential, wheels and then gets to the roller where the power is measured.
Typically, about 12-15% of the engines power is lost before it gets to the wheels.
I'll post this to the Fiesta ST group on Reddit and the so called experts come up with some reason why an aftermarket filter is a waste of money. I myself did notice improved throttle response after dropping in the filter, every little bit helps.
Thanks... I've used K&N since the 80s and they work well for me and are reusable.
Have you dyno'd after performing a recharge on the filter? Keen to see effectiveness of cleaning the filter.
Hey spiritbuu,
That is an interesting question. As it turns out yesterday I picked up a second set of used K&N filters.
The K&N filters in my car have been in use for almost two years. I could clean and re-oil the the second set and the next time I am at the dyno, run the two back to back and see if there is any difference.
I will add this to the production schedule for this year. Thanks for the idea!
Awesome! Looking forward to it.
The oil on the k&n can get onto the air sensor and can make your car run lean have a look at the mighty car mods vid titled pod filter mythbusted at 7:55 they talk about k&n filters but the whole video is worth the watch
Hey Ayrez Rc,
Thanks for your comment.
The only way oil leaves the K&N filters is if it is over oiled. Since I don't over oil them when I clean them, I have not had any issues in 32 years and over 500,000 KM in total K&N filter usage in 5 different cars and 1 motorcycle.
THANK YOU VERY MUCH for this video, I only wish you were the local mechanic
Thanks for your kind words!