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Is Your ROTO-FAB Cold Air Intake Losing Horsepower at the Racetrack? CAMARO ZL1
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- เผยแพร่เมื่อ 15 พ.ค. 2023
- Is the Rotofab really a hot air intake or can it live up to its hype? The outcome may be surprising, so stick around and watch the video.
In this video we are comparing racetrack performance of an aftermarket Rotofab cold air intake to the Camaro ZL1 1LE factory airbox with a performance filter by Green Filter.
We’re using the Chevrolet Performance Data Recorder data and extracting:
Outside Air Temp
Inlet Air Temp
Calculated Horsepower
Boost
RPM
Some of this footage is from Banks Power @bankspower
bankspower.com/
Roto-Fab Intake
www.roto-fab.c...
Green Filter PN 7299 @thegreenfilter
greenfilter.co...
Description tags: Roto-Fab, Rotofab, Camaro ZL1 1LE, Camaro ZL1, Chevrolet Camaro ZL1 1LE, Camaro SS, Camaro SS 1LE, Cold Air Intake, Air Intake, K&N, S&B, Banks Power, Banks Engineering, Hot Air Intake, Air Filter, Racetrack, Race Track, Horsepower, Horse Power, Dyno Test, Dyno, Camaro Mods, Easy Camaro Mods, Racing for ALS, Carolina Motorsports Park, Inlet Air Temperature, Air Density, Hot Air, Cold Air, Green Filter, Corsa Cold Air, Easy Mods, Easy Car Mods, Tech Video, Automotive, Auto, Garage Video, Racing, 6th Gen Camaro, 6th Gen, 5th Gen, Z28, SS, 1LE, 2024 Camaro
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🏁🏁🏁🏁Thanks for watching. I'm sure we're going to get some comments on this one! Please be courteous. 🏁🏁🏁🏁
greenfilter.com/store/filter/7299 and cleaner kit greenfilter.com/store/filter/2000 . I would recommend Summit Racing to buy it. www.summitracing.com/parts/gre-7299 or you can call them at 1-800-230-3030. Throw in a couple bottles of oil or Redline Water Wetter to get you to $109 for free shipping.
100% I absolutely agree with this…. Rotofab is popular and great if you drive without a hood or want to cut a hole in your hood. I sold mine and grabbed the CAI Carbon Elite with a velossa tech big mouth ram air to feed extra cold air I don’t have all the data recorder stats but its been tested to reduces inlet air temps by 13 to 17 degrees. For myself, I loss on average 5km/h in the quarter mile with the Rotofab when engine temps where up compared to stock , with CAI and velossa tech i gained on average 5 to 6 km/h over stock. Not scientific testing not exact same conditions but that’s over numerous runs over numerous days. That’s all i need to know. I did get my CAI Carbon Elite used for $600 Canadian off a guy who was selling his ZL1 …being in Canada i couldn’t rationalize paying full price for the intake because the extra costs we incur when bringing that item in it would have cost me close to $2000 when all is said and done which is too much. You can’t accurately Dyno to test the impact of these types of mods. Sure you get more supercharger whine sound with the open rotofab design but that’s almost the equivalent of these new cars that have fake exhaust sounds piped in through the speakers makes you sound like you are going faster but its all smoke and mirrors. I say most cost effective is keep stock box drop in a performance filter and add the velossa tech big mouth save your money over buying a rotofab unless you want the whine sound then enjoy but there is no performance benefit because of the extreme amount of heat generated by the LT4 the open design fails as it does not completely seal and it sucks in too much hot air from under the hood. If you want a cool looking open design grab the corsa carbon fiber one at least it looks cooler than the rotofab at a similar price point.
@@louisindelicato1406 Thanks for commenting. Glad to hear that some ZL1 Camaros are up in the Great White North!
100 % correct 👍🏻
I don’t understand why Rotofab not give the “closed box” in ZL1 .
Thank You***** I was thinking about buying a roto fab. But I did not think it would be better because of the open top, I am glad You made the Video. seems like common. Sense. save Your money.
Tremendous job here Scott! I've been saying this for years but no one wanted to hear it....3 yrs of Stock Airbox w Green Filter. Tracked my ZL1/1LE at VIR and Summit Point Main in Ambient temps of +85', my IAT's were never a concern. Cheers!
Thanks man! Hopefully this video will get some more visibility outside the core audience of the channel.
This is very interesting. I have thought about this a lot as I buy different mods for my 23 2SS 1LE. This was a very good video with some real data to back it up! Thank you!
You always do such a great job. That’s a nice Camry btw.
It's the Camry R Version with quad turbos. 🤣
Great vid.
I had a suspicion that this was the case that RotoFab would suck in hot air vs stock air box. I am torn though because I really wanted the Fab filter for the extra SC whine but I'm not willing to sacrifice horsepower. Someone else makes an aftermarket filter which I forgot at the moment but it's the same concept as Rotofab.
Thank you for the video. Very eye opening
Thanks for dropping a comment!
I always recommend dry air filters for all heated sensor element MAF equipped vehicles to avoid the whole oil contamination issue. That being said, when I first picked up the car I immediately swapped out the stock paper filter to an AEM Dry-Flo filter. Zero issues and they have been proven to outflow other cotton/ gauze style filters like K&N and AFe. Definitely plenty of airflow for my 707 WHP/ 770 WTQ ZL1!
Bonus extra: I mentioned this in a sub comment, but make sure to remove the snow blocker next to the driver's side headlight right before the snorkel to the airbox starts to further remove restriction and maximize the airflow immediately coming in through the grille area.
CRC makes an Mass Air Flow Sensor Cleaner that I use every oil change. Works like a champ. Just don't over oil a filter.
@@RacingforALS oh yeah I know, I've seen it before. We used to use parts wash if we didn't have that on hand. It works good, you just gotta make sure the sensor is not hot still.
To me, it's just an extra step that shouldn't be necessary under otherwise normal circumstances. Where I live there is a lack of dust and sand so I don't have the additional need for an oiled media filter which does offer additional protection against external contaminants.
SS1LE owner here and an engineer. I always dismissed the open hood cai dyno comparisons which neglects the heat soak during operation with hood down. I know K&N, AFE and Green drop in filters are pretty good with the downside of filtration efficiency in the long run and maf sensor problems due to too much oil application during service intervals.
I'm a Mechanical Engineer and love data!
In my experience, the factory airbox is best for all, but the most radical engine combination.
Nice work, I'm running a Forced induction Interchiller no more Heat Soak my AIT run about 45 degrees all day and about 65 degrees on the Track, and I'm running a Roto-Fab Big Gulp too, On my 2018 ZL1 Camaro.
On the road course or on the drag strip?
You lose AC efficiency with an interchiller?
When we ran it in Fontana Speedway, And I've got Weapon X Motor sports Heat Exchanger for Back up.@@RacingforALS
Hi Mike I'm Running a Stage 2 Forced Induction Interchiller.@@Mike-lx5pw
I suspected this would be the case. It's nice to see some numbers behind it.
Thanks.
I have an SS 1LE and I originally bought the K&N cold air intake which I've had on it for about two and a half years and just recently I figured all this out because it does not seal to the air Inlet the way the factory one does so I'm going with the rotofab that seals to the inlet, the hood, and sealed box!! My car is cammed and not been running the way it should due to the CAI!! I figured out that my factory air intake is better than any aftermarket non-sealed cai. More so than the difference in horsepower is the throttle response has developed quite a bit of lag with the K&N non-sealed cold air intake as compared to the factory sealed one.
WOW!!! This is exactly what I was thinking after running my car at Barber last month! I have the Banks iDash and Datamonster monitoring my IAT, MAT, EGTS and MAD to name just a few parameters. Now I need to figure out how to seal it off since I do not have the factory airbox and still love the sound of the supercharger! I guess its time to inject some meth into the intake!!
I suspect that most of the air is coming from the hood seal and the interface with the fender splash shield. I'm not sure there is going to be a magic solution. Obviously the Roto-Fab is doing a reasonable job, but some percentage of the air from the engine bay is getting in.
@Racing for ALS Have youbseen the scoops that go behind the grill to duct direct ram aur to the RotoFab?
@@DavidWilks yes. It would be interesting to test them. They do cover about 1/2 of the upper grille, so they may redirect air that would go to the radiator.
@Racing for ALS
I've thought of that but also thinking of opening up the hood to ventilate more frontal pressure and increase the airflow thru the grill. This made a massive difference on the Boss302 cars with the Paul Brown Tiger Racing hoods in Pirelli World Challenge cars
I put in the Cold Air Inductions on my car there is no way you will suck in hot air from the engine with it you should check them out.
im so glad i came across this video. roto fab is not worth. boosted cars already have heat regulation issues. Thank you!!!
Glad it helped
Very interesting numbers, you got me second guessing the Roto Fab. I really want that SC charge whine louder tho. Are you removing the rain shield during track sessions too?
Yes, the car is prepped per the track manual with the underhood deflector removed. I have also removed the snow/rain shield behind the headlight.
This is all very interesting, going to do this same upgrade to my Tacoma!
Are you able to compare boost pressure in Cosworth to learn more about relative airflow restrictions?
If you freeze the frame at 4:36 you can see boost pressure. Boost was .5-.7 higher with the Roto-Fab than the factory box, likely due to a lower restriction. The higher temps most likely lead to lower timing and reduced power.
I'm not surprised.
Great video, but where’d you get those banners?
A great friend, trusted colleague, expert woodsman, infamous ladies man, and above-average photographer. 😁
I wonder how the Cold Air Inductions (Chevrolet Performance Intake) compares? It’s a sealed “high flow” intake.
The seal is not as good as the stock. The only Cold Air Induction that seals good is the Carbon Fiber one but for $1,000 its a rip off
Great info! What is the current thinking with the oiled type filters and their potential harming of the MAF?
They are perfectly safe as long as you don't over oil the filter. You can also use CRC MAF Cleaner on the MAF element every oil change.
Rum an AEM Dry-Flo drop in filter. They were proven years ago to outflow everything else on the market including AFe and damn sure K&N filters. Best of all, they are dry, so there is no need to oil or ever having to worry about oiling them.
You are right dont use oiled filter
Great analysis and the point about the hood being closed. I always wonder about that and makes sense. But, a Mamo ported OE 87mm throttle body could do a good job of gaining some high end power due to less restriction while using the OE intake box. Plz review that.
I will if I get an opportunity. On my old car, I ran a ported throttle body (just the upstream side of the throttle plate). It felt great after first installing it or after an ECU reset, but over time, the car adjusted the part throttle position to correct the anticipated airflow. A tune could resolve the issue, but ported throttle bodies do not make long-term gains on stock-tune cars.
Makes sense, so a tune is necessary. Apparently, the GM tube has strange knock control behavior so may be good to get a conservative tune and review of motor operation with one and a ported TB.
Wow, I’m glad I kept my stock 2018 zle airbox. I’m ready to put it back in. I’m going to the track in two days. Where do I get this green filter? Also do I need to buy some kind of clamp for the one hose on the bottom? I remember 5 years ago having to remove the stock clamp and I’m pretty sure that wasn’t reusable.
You can use the same worm clamp that came with the Rotofab to replace the PCV line or Autozone has worm clamps for less than a buck. greenfilter.com/store/filter/7299 and cleaner kit greenfilter.com/store/filter/2000 . I would recommend Summit Racing to buy it. www.summitracing.com/parts/gre-7299 or you can call them at 1-800-230-3030. Throw in a couple bottles of oil or Redline Water Wetter to get you to $109 for free shipping.
Thank you so much for the fast response! Does this green filter come pre oiled?
@@BenTheHoff yes.
Old airbox is installed. Wow, the supercharger whine is gone. Oh well, now to listen to the borla cat back more!
My green filter has arrived! Say, are you running the stock throttle body? I was thinking of upgrading mine.
So its not that the filter or inlet tube is the issue. It's a matter of letting more hot air in vs. the stock box. So make a better seal for the better filter element and tube and problem solved?
Correct, it is an inlet air temperature and therefore an air density issue. Even at a lower restriction (pressure drop), the lower density produces less horsepower.
Gale Banks knows his stuff.
What are your thoughts of intake flow comparisons in respect to NA cars like a SS, opposed to a forced induction ZL1 ?
@followmyline17 sent me some data on the SS with a rotofab. "Rotofab on the SS was reading 8-10° hotter than ambient." Another SS on the same day with the stock box had lower IAT temps. Those results are comparable to the ZL1.
@@RacingforALS Thanks for the info ! So if I understand correctly, when the car is cold the Roto-Fab has an advantage, but as things heat up under normal driving conditions, the advantage diminishes , possibly even giving the stock unit an advantage?
@@jbrewster6175 These temperatures were recorded on a race track after several laps. The temperature delta is most likely less with a cold car for a single quarter mile pass. Street driving is probably in the middle.
@@RacingforALS I was thinking that typical summer street driving could produce the highest under hood temps. Stop and go traffic, red lights, and low rpm driving that doesn't efficiently move air through the engine compartment, or coolant through the radiator. Not quite apples to apples, but I know my old muscle cars all run much cooler at highway speeds than stop and go traffic. This is with a mix of radiator types and electric of belt driven fans. I guess I just cant see the downside of a closed system drawing air from outside of the engine bay.
My car was a turd last week At Barber.
"88 degrees"outside temps ,
I'm running the Corsa CIA basically just for the Super charger wine.
Got to make priorities. 😆😆😆
I tried the Corsa on my ZL1. I would call it a hot air intake rather than a cold air intake. It lasted about 25 miles on my car before I removed it and sent it back for a refund.
Thanks, I have a big rotofab,103 and a Mag 2650. Past the cac I would think it is still cooler than than the stock stuff. Questions, questions, questions....
im glad i didnt change mine. would a tune help?
It's not a tuning issue. The higher air temperature lowers the air density and horsepower.
Hey bud what’s up i have a 2023 zl1, was thinking about the roto fab since every dude puts it in his car but after this video im thinking other options have you thought about or tested the AFE intakes they are almost fully closed intakes!
I have not tested other intakes, but if you read the comments below, some viewers are saying to avoid the Elite Carbon. The AFE looks interesting. It appears to have two different scoops. If one of them mates to the factory snorkel and still has less pressure drop, then it could make more power. If someone will send me one, then I'll test it! 😎
AFE has quite a bit of data on its website. The oiled filter box says 11% more airflow, but they tested it without the side plug installed. The box is pulling air right by the headers through the plug. I am also concerned that the tube in front of the mass air flow sensor is aggressively flared out. For accuracy, the MAF is supposed to have a straight pipe before and after the sensor.
You are absolutely right haven’t thought about that unfortunately i asked around mostly tested roto fabs only no one tested afe
Does the green filter make the stock air box whine louder like the aftermarket CAI's?
Maybe a little, but if you want whine the CAI is the way to go.
Is the “green filter” an oiled gauze style filter or paper?
The Green Filter is a cotton mesh with oil. It's equivalent to a K&N type filter, but has higher quality molding and materials. The Green Filter has a nice tight interference fit with the air box and there aren't any exposed mesh ends or rubber flashing like most K&N panel filters.
@@RacingforALS
Do you have a link for this filter?
@@DavidWilks greenfilter.com/store/filter/7299 and cleaner kit greenfilter.com/store/filter/2000 . I would recommend Summit Racing to buy it. I don't have a link due to website maintenance, but you can call them at 1-800-230-3030 or wait for the website to reboot. Throw in a couple bottles of oil or Redline Water Wetter to get you to $109 for free shipping.
I have a stock 2023 ZL1 (non 1LE). Do you have a recommendation for a better air filter that the factory? If yes, can you please provide the part #. Thank you!
Green Filter PN 7299 @greenfilter6451 greenfilter.com/store/filter/7299
FYI, we don't get anything from this manufacturer. It's just what we use.
So I just installed my roto on my 23 and the air dicting goes right into the roto airbox and the box seals onto the hood. This is bad info in those ways. I would be curious if these numbers are not correct on many camaro models
It's not totally sealed, the IAT and ECU calculated HP proves it. These temps have been verified by other people on the road course. If you have different data, then I'd love to see it.
What about the cold air induction Elite Carbon Series Cold Air Intake? Does anyone know if it is better than the stock intake or worse like the roto-fab? Because I am wondering if I should buy it or not if someone has actually done some data on it, and can actually say if its worth it or not.
I don't have data, so I don't want to speculate on the performance. I believe there are some comments below that indicate quality issues with glued-on pegs for the Elite Carbon which is unfortunate for the price of the intake.
I'll try it on my '23 ZL1 before I put on a roto fab🤔
If you can get some data, please share it. Thanks!
How is the IAT cooler than the outaide air with oem airbox?
The sensors are obviously not perfectly calibrated. There is a 2-3 degree negative offset from the Outside Air Temp Sensor and the IAT sensor, but the offset is consistent across the two test.
Did you utilize the factory air box with zero modification to remove relative airflow restrictions…?
The stock airbox was not modified, but the paper filter was replaced with a oiled cotton Green Filter.
Remove the snow blocker plate next to the driver's headlight and you'll further remove restriction from the fresh air snorkel.
Anyone modding these car knows they have to managing IATs on these infernos, if you are staying stock there is no reason to have an intake only. Plenty of testing has been done and proves the gains of 5” inlets/103-120mm throttle bodies in the 800+ who range. While Mr. Banks knows his stuff and oxygen density is the most important factor of an intake, it is disingenuous in his snippet of presentation showing a stock LS3 with a hot air intake slamming the industry for making such a product. There is no free lunch, back your learnings with data/logs. If my Interchilled 2650 car went back to a factory TB and airbox I’d lose a tremendous amount of air volume and increase plenum vacuum causing additional pumping losses.
Good points, but ultimately you need outside air on a road course when coolant temperatures are 230+. It doesn’t have to be the stock airbox, but the Rotofab isn’t adequately sealed from the engine compartment. Thanks for sharing your well written explanation.
Sucks hot air hp less it doesn't work hot air no increases in hp i know it looks good 500 dollars later
"Pure Jackassery." 😆😆😆
Mr. Banks calls it like he sees it.
Rorltofab is garbage. People buy them because the name Is trendy... Funny how thousands of used Rotofab units are for sale online. 😂😂😂😂
Cold air intakes are all garbage, for Cummins pick ups they are garbage, almost all of them with the open filter under the hood are just taking your money.
You don't know anything about cars, therefore do not comment about any cars or car parts.
Don't purchase the ELITE CARBON CAI they don't offer a dry filter !! Plus it cost a grand !!! 😢
What do you think of the elite carbon series? It is also fully closed of CAI plus do you think the carbon would keep it cooler for longer runs vs the stock?
I don't have any experience with it, but believe it is fairly expensive. We'd be happy to test one.
Interested in this too. Zander13 had one on his channel on a part 1 series and never did a follow up. It was removed for a Corsa. Wonder if he didnt like it or had issues. Would have liked to see some data on that. Looked interesting and if the cost justified performance, it would have been interesting to hear more.
My experience with the Cold Air Inductions Carbon Elite intake wasn't very positive.
One corner of the intake box sat up too high and rubbed on the inside of the hood when it closed. During attempts to get the box to sit correctly, several pegs on the underside of the box that fit in the grommets on the engine bay frame broke off. The pegs are only held in place by the carbon fiber coating surrounding the box.
The first time this happened I sent the box back to Cold Air Inductions and they glued the pegs back on. Trying to seat the repaired box the pegs broke off again. The third time I tried to glue the pegs back on only to have them break off again.
Frustrated, I contacted Summit Racing and they allowed me to return the intake for a full refund.
For an intake costing that much, the pegs should be secured to the box with screws or something stronger than the carbon fiber coating.
I have CAI and i love it and have it paired with a velossa tech big mouth ram air and have noticed gains see my response to the Racing for ALS original message. I got my Carbon Elite used on line from a guy who was selling his ZL1 so i got it for $600 Canadian with local pick up so i couldn’t pass it up. It also look incredible under the hood. As for benefits over stock similar closed design and carbon provides better heat insulation over the stock plastic but as i mention above I recommend best cost effective mod is keep stock box upgrade the filter and add the velossa tech big mouth i believe the biggest difference is from that ram air is that it takes half of your upper front grill and feeding that cooler forced air directly into the air box. If you do car shows as well and want some under hood eye candy the CAI Carbon elite can’t be beat for pure aesthetics but its expensive. I never would have paid full price for it, being in Canada with shipping , exchange rate, handling feeds and duties/taxes it would have cost me close to $2000 which is too much for me rationalize.