🛠 Fuel Injectors - Is Bigger Really Better? | TECH TUESDAY |
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- เผยแพร่เมื่อ 24 มี.ค. 2019
- It's Tech Tuesday Time! Today's topic is Fuel Injectors. What they are, how they work, what different kinds are available and, most importantly, does size really matter? Scotty dishes out more useful information in less than three minutes than most politicians in their entire pre-election campaigns. #truestory
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It's Tech Tuesday Time! Today's topic is Fuel Injectors. What they are, how they work, what different kinds are available and, most importantly, does size really matter? Scotty dishes out more useful information in less than three minutes than most politicians in their entire pre-election campaigns. #truestory
Got a topic you'd like us to cover? Let us know in the comments section!
How about expanding on this and talk about staged injectors vs 2k's etc. I'm still running staged and while I know they've gotten much better I'm still on the fence about changing things. Especially since it is a street car.
i think bigger injectors with the same ecu tune have a higher fuel injection. is that right or false?
That nitrous smile.. :D
I have an idea to another tech tuesday, fuel rail pressure options, return to tank, pwm, that stuff
Accurate, precise and no beating around the bush. It's the information everyone always looks for finally answered.
Nitrous! = largest smile in this video 😂😂😂
Such a nice concept you guys came up with in regards of giving Information & Knowledge in a short time.
Accurate, short, and to the point, I Like it! (Well, it could have been longer IMHO) I had not considered the injector spray angle concept, but it makes perfect sense!
Loving these tech tuesday videos scotty, keep it up!
reminds me of the mcm go fast brett, really enjoyed that little series.
Could you maybe elaborate on choosing injector sizing for say converting from carby to efi or in general?
That NO2 smile 😂😂
Thanks for giving the info clearly and thoroughly.
That’s a badass Oklahoma plate you have there brother.👍🏻
that video was very interesting, thank you 😃👍
LOL, look at the way his face lights up when he says Nitrous @ 2:24
great video!!!
Thanks 👍👍👍
I've been running precision injectors for about 3 to 4 years or longer and I've had no problem with them ivw sent them back when I do a refresh on my engine but besides that no problems but you have to have ant injectores cleaned and the o rings replaced if you run methanol.
Make a video on how to match injectors to engine pls tnx
I own a 97 corolla base model which only has the 1.6L with no valve timimg advancement . It's stricky a ECO friendly car. Most corollas have the 1.8L . So it hard finding perform parts. And the 3 speed auto doesn't help so I've tired many mods and one was does the 1.8l injectors for the 1.6L fit? YES IT DOES!! SAME CONNECTOR AND EVERYTHING!! the higher cc helps but you need to get at least a soft flash chip to piggy back your ecu to get the most out of this mod. Or else the stock ecu will just so spray the same amount but the chip will push it to the max. Hope this helps! 1997 Toyota corolla base 1.6L
I was hoping you would explain how to come up with injector size number w.r.t. engine and mods with examples
Question, my injectors that I got for my build are the Siemens deka 2200cc injectors. My engine is a 13.5:1 compression and it's a stroked 2.2L f20b 95mm crank by 86mm bore. My question is I'm going to be running VP M5 race gas with 20% nitromethane in it are my injectors too big or no?
So in a flex fuel vehicle, since more e85 is needed per cycle than when running gasoline, is duty cycle what changes when you go from e85 back to gasoline and vice versa?
Rite on time just before bed "4 me" great job once again THANX MATE✌✌✌✌YOUR THE SHIT TUNING FORK!!!!
What do you reckon of Bosch Indy 1600cc on a low comp forged LS1 running E85 at up to 20psi
the problem with big injectors is the car may not be able to idle if the required BPW is too low. It takes time to fully open and the ecm may command it to close before that resulting in poor atomization. One solution is to use two small per port (work with one at a time, ) another is to use throttle body injection, or low impedance if the ecm accepts. that’s what I’ve found so far searching about them.
i have a chevy cruze turbo and just had it tuned to have the turbo give 22psi, would it be necessary to upgrade the infectors?
Thinking of direct port injecting a Cleveland what do you sugest
Hey man I've got a stock 5.3 HO with ls2 intake and stock ECM with vats deleted ect. My ? Is what injectors can I get by with while utilizing the stock ecm. My tuner told me I'll have to get a new tune for the new injectors. Just unsure on the style.i can use. Thanks man.
i have a question if someone can please answer it will be greatly appreciated i cant find any info, im gona run 1050cc top feed injectors, high independents i want to know if i have to install the Injector Ballast Resistor
i have a power fc in my sr 180sx
If i change
Manifold air filter throttle body headers muffler and dyno tune I guess will make sense to upgrade injectors ? What your thoughts?? Please advice
Question for anyone that knows... if ford 24 lb injectors are rated at roughly 39 psi.. if you put 65 psi to them..would that make them close to 30's? My fuel system can't be adjusted..stock 2000 explorer 302 ..it has from 65-72 psi. I have ported twisted wedge heads and intake and a 220/230 cam. I need to get injectors.and don't know if I should get 24 or 30's.. should be close to 350 hp to the tire
Is laugh with nitrous tells me he kinda fancy nitrous 👌😉😅🤣
What cc would you recommend for 500whp built ej257 Subaru? thanks
Hello
I am going too change too a bigger turbo from k03 to a k04 with a better flow from the better manifoild
and I am going too change the ecu and I wonder if I should change the injectors too a bigger size 441cc??
Is going big on injectors before you need them detrimental though? If you want to play at 600hp before you install your 1000hp turbo setup can you just get 1200cc injectors the first time? Or do you have to buy 2 sets?
I feel as though most people watching this would already know what you are talking about but in hope to see results that back up the title, you should have labeled the video "what is a fuel injector". So people that know what a fuel injector is dont have to watch the video and feel like they are in grade 1 again
daniel step facts
this is one of those videos that you search for answer and leave without it.... absolute trash
Idk why but haltec is the only ecu compnoy i know, so when i get me skid car in 2 years vt, vs, vn, haltec is the first mod 100%
Its the only one you need to know too
@@southjerseysound7340 yes very true
Aww... this makes us feel all warm and fuzzy:)😍😍
@@haltech no problem also could i barra my tv need to get that power
Hi, so I didnt hear anything on cc. Does that matter? I had the idea that you get what your car is rated or higher, nothing lower, right or wrong?
The goal is always proper fuel to air mixture. Which you have when stock. Bigger injectors only work better when the volume in the firing chamber is increased. IE- new heads with larger intake and exhaust valves and or new cam for longer durations. Things actually that effect combustion chamber volume. Cold air intake is not enough to warrant larger injectors regardless of exhaust. You’ll be to rich !!
So what do u suggest I do, I’m getting 1000cc injectors because the ones I have don’t work. It’s a g37 cold air intake, test pipes, plenum power intake manifold
So 1000cc and 250cc fuel infectors tuned to supply the same amount of fuel will deliver the same performance?
Sir I have 16 resistance injector is its efficient injector or what ?
How about Stright piping your cats then adding four hole injectors instead of a single with this work to increase MPG and performance?
Is there any disadvantage to going for a large injector size to future proof your build? I put 720cc injectors in my L28ET so that when I feel like perhaps strengthening the motor and upping the boost they will not be an issue, as well as a high capacity fuel pump and a few other bits and pieces
Yes, it is a good idea to consider your future goals in selecting an injector size.
It would be nice to know if FUEL INJECTORS all are wired the same, that is, can POSITIVE PINs be on either pin. Again I know one pin receives the constant 12v (or less) while the other side (pin) is the trigger to complete the circuit and cause the spray. Will they work with the power (12v) connected on either pin ? PLEASE ANSWER I will let you know why I asked !
Can your system run common rail diesel solenoid Injection?
🤔 injector size × number of cylinders = supportive horsepower potential. Example, V8- 50cc injectors- needed for supporting 800hp ☆naturally aspirated, boosting fights output of injector and pump, 10lbs boost requires 10 more lbs fuel pressure, vacuum reference on fuel pressure regulator add more fuel when needed and less with less boost say at idle so it doesn't flood, BUT this is all just a guess from a random dude in the comment section~VROOOOM 🌪
great info.
So if I just wanted that crackle and pop sound, will larger injectors give me that. I don't care for extra power. or what will give me that sound. I don't have a turbo or supercharger.
Carlo whittaker The better your exhaust gasses flow, the more pops and crackles you’ll hear. i.e. cat delete, aftermarket exhaust, straight pipe, etc.
How do you find out the best spray pattern? All the info i can find is related to cc/min at x fuel pressure
MrbishiCordia it’s going to depend on runner design, angle, and combustion chamber design
So what's your thought on using oem injectors from one car in another? Example using Ford 5.0v8 injectors in my vw 4cyl. The stock flow of my oem injectors isn't quite high enough. But the Ford injectors are 440cc from a specific year zone. Should i buy expensive injectors or would the cheap oem Ford stuff be adequate?
The Ford stuff would work just fine if you can get them to fit your fuel rail. Many ppl run different varieties of oem injectors into cars that aren't the same manufacturer due to cost.
@@clutchkickpj693 i believe they are the same style as what i currently have. But i think it's amazing. I can buy some fancy injectors for 60 each or i can rock auto some oem stuff from a mustang for 20 each lol.
Will larger injectors give you that gurgle or popping sound from the unburmt feel in the exhaust.?
came here to ask the same question
So do bigger injectors work well with lets say cold air intake and/or larger throttle body
No. They do not. Cam timing, larger valves heads. Things that change combustion chamber volume !
i know this video is a bit old, but hoping I could get some help; if i'm supercharging my 86, would it cause problems if i install larger injectors? I ask because ive heard that the stock injectors do fine unless you're making massive power, and don't want to have an issue where i'm putting too much fuel in the cylinder due to the larger injectors.
hey there, what did you end up doing as far as the injectors? I’m planning on supercharging my 86 as well and would like some insight.
@@calvin1510 So I ended up getting grams 550cc/m injectors with a deatschworks 340 lph pump. The tuner I went to was able to make it work with those, but they said that the injectors were a bit overkill. Not necessary at this stage but maybe if you want to run e85 or more boost down the line, could be worth it.
Questions. So many questions. How do I know what injectors to purchase? What size will I need and do I need a bigger fuel rail?
It all depends on what you're building and what you're planning to do with it. Best thing to do is to talk to whoever will end up tuning your car - they will be able to recommend the size and type of injectors you need based on the details and the purpose of your build.
There are a few online "Injector calculators" where you can input your parameters such as fuel you're using, fuel pressure, number of cylinders, aspiration (n/a, s/c, t/c), and your desired horsepower, and it will give you a ballpark of what size injectors you need to achieve that power.
Remember what Scotty said though, you should consider your injector maxed out around 80% duty cycle for reliability and longevity. However, it certainly doesn't hurt to future-proof and overshoot the size of injectors you get if you know you're going to add more power later on.
So if im thinking about upgrading to a bigger or twin throttle body should i upgrade my injectors?
Brandon Young are you going to be running more air than the own injectors can handle? A bigger throttle or twin throttles does not automatically equate to more air entering the engine.
Well technically speaking bigger the injector the earlier the desired amount of fuel will enter the chamber and give it a split second longer to atomize making them actually make more power, and burn more fuel per stroke. Science is awesome
If you don't know what your doing don't go by what the parts stores say, most of the time your going to get the wrong injectors, go to the dealership and buy the actual OEM injector's. I see people's videos posted replacing injectors and most of the time they put the wrong ones in. I hope this helps
So if you have longtube headers, a cold air intake, and straight pipes... would bigger fuel injectors help the performance?
Not in my opinion. Your not changing anything out that effects air fuel charge volume. Cold air intake does not change air volume enough to warrant any fuel increase !!!
Hello! I have an Civic EJ9 1.4 90hp and installed a bigger intake (before 50mm now 60mm) and an H&k tuning air filter.
In theory it should get more air now.
That means, i could install slightly bigger fuel injectors to produce more power, fitting to the slightly bigger intake?
With an ECU reset the system should adjust to make it work, doesnt it?
Im thankfull for your advice.
Greets, Max.
na bro doesnt work like that engine brings in what it needs if you need more air go turbo to force it in and need a ecu tune to make use of that otherwise your wasting money ..it might make it sound nicer thats it
If I change from 24lbs to 26lb injectors will I need to tune computer for them to work?
So if I go for an bigger pump with bigger fuel injectors and an KN airfilter or other airfilter will there get more power out of that?
NO. Your not changing any volume in combustion chamber !! Cold air intake tube and filter not enough.
if a gt86 with turbo kit and its 400hp with 1100cc injectors, does it mean will eat more gasoline? sorry newbie
Why increasing engine compression would require more fuel??
Big help quick question sori if it’s dumb any help b great converting to e85 from 98 I got new fuel tank and pump just want to now if I have to change the lines that run through the car? Any help b great 👍🏽
It depends on what quality of lines you have in place. Generally speaking though it's a good idea to update fuel lines and fittings for E85.
Haltech then that’s what I’ll do thanks heaps much appreciated
I have some questions about the elite 2500 that haltech usa hasnt been able to help me with. Who can i contact for some more information?
You can contact Haltech HQ on +612 9729 0999 or email support@haltech.com
I have a 6 / 364 cubic inches of taking it out the 408 cubic inches I need to know how big of injectors to put in it and will the stock computer running it
We don't know the answer for the stock computer Scott, but probably not without some sort of reflash to make changes to the programming.
We would recommend swapping to a Haltech ECU of course, would make the change as easy as hooking up a laptop and popping a couple numbers in the software.
At least 5 guys are still running carburetors...
But how do I calculate the size injector I'll need? I've tried several different internet calculators and none are consistent.
Go to fuelinjectorclinic.com
well what about if i used race headers and air filter intake should i use bigger fuel injectors ? would make any difference ?
No you should not.
@@flatheadfletch thanks man .. really was waiting for 2 years
What if you get a cool air intake and then some bigger fuel injectors?
A cold air intake won't make nearly enough of a difference to require larger injectors. Generally on an all motor build the stock fuel system is fine for at least an intake, header, exhaust, and mild cams. When you convert to E85, boost it or significantly increase boost, install nitrous, build a more extreme all motor setup with ported heads, drastically increased compression, aggressive cams, higher redline, etc, then you may need fuel system upgrades.
How much 4g63 16 valve fuel Injector
If I replace my injectors with some that flow approximately 23% more fuel, then replace my petrol with ethanol, is it likely to work or just explode my engine?
I was thinking about the absolute simplest (and stupidest) way to convert my car to run on ethanol.
Depending on car, injector, fuel pump, and tune, anything can happen. Don't cheap out if it's a daily driver, or you could and most likely will be stranded.
We don’t know what ECU you have or what engine you are using, but in theory the answer is yes. If you size the injectors to take into consideration the extra fuel volume required to run E85 then it should run.
Ive heard 80% duty cycle before, is there a technical reason for this number? my thoughts are that if i am running 95% duty but also at the top of the power/boost i will ever use then 95% is fine. The spare 20% only helps with tuning/tweaks and having spare capacity. It doesn’t mean 80% is safer then 90% ... change my mind.
wrx2hot4u you will over work/heat the injector
Nicolas Losito over work and heat the injector? and ... ? and what? also how often and for how long are you actually hitting peak? i would say not that long. Good Injectors are designed to operate at 100% duty.
wrx2hot4u actually after a bit of reading I have found that you are correct. 80% duty cycle is usually standard because of air temperature temperature and load considerations. Running 100% duty cycle will not over heat the injectors since the fuel acts as a coolant.
Nicolas Losito correct, and the only reason i know what i know is because a well respected tuner basically explained it to me. So running 90 odd duty is ok but dont ask for more fuel. You then need bigger injectors. It is always good to have head way.
Spot on bro. Your mind does not need to be changed because that statement is correct.
Does the injectors ability to atomize fuel as it sprays make a difference? I see how changing the volume of fuel would need supporting mods, but an injector that mist fuel more finely seems beneficial.
My thoughts exactly. Never seen this covered
But getting bigger injectors would be bigger capacity so you can increase to max wouldnt it?
Power.. power... power what about efficiency when changing injectors
power is directly relevant to efficiency:)
so in theory if i add a cold air intake, and bigger injectors my 2002 toyota corolla dx wagon would go faster 😃
Hmmm. Will they give you more power? Well... they are not the only part of the process.. what about fuel pump? Does your pump deliver the proper flow rate.. do you have sufficient air flow? Are you tuned properly? There are Many cogs in the wheel ...they all have to work together.... but if all your cogs are meant for the same wheel.. then yes
Say you have 300cc injectors and to tune for max performance you need around 400cc injectors(running at 80% duty cycle)... But you Might be running for example a bigger turbo that needs 660cc(80% dc) injectors to be fully utilized. Is it bad to run 660cc injectors then, even tho their duty cycle will be pretty low? Will it give you a loss of performance or worse ride?
So my question is really if you are going to drive like that for 2 years or so, is it worth it swapping injectors twice?
@@andreasrosland1635 Most modern injectors work pretty well at low pulse, never hurts to talk to the tuner and see what they're happy with
In the example given it shouldn't make much difference. But if you plop in 2200cc injectors you'll get a duty cycle so low that that you won't get a good homogeneous mix at lower power, which is why you often see big power street cars have primary and secondary injectors.
Thanks for your answers guys! This was more of a generic question that i feel wasent covered in the video.
Using 660cc injectors when you only need 300 or 400cc injectors is fine (As long as the 660cc injectors have a good spray pattern). The problem arises when you use 1000cc or 2000cc injectors when you only need 300cc injectors, you get all the downsides of a big injector when you just don’t need them.
Question: Does increasing fuel pressure increase the volume of fuel the injector spary?
For the same pulse width, yes
Enjectah
You still around? I have an injector question...
Its diesel its huge
Increase air and spark and combustion.
Tech Tuesday !? But its still Monday !! 😋
It's Tuesday in Australia. Greetings from the future:)
its Tuesday here in New Zealand. lol
Yes bigger is better lol
Will bigger injectors cause more heat in a supercharger engine?
Bigger fuel injectors more fuel more power
Air flow is the key, think of the engine as an air pump and then match the injectors to the efficiency of the air pump. Simples in a basic way 😑
So you guys do actually know your stuff and then you spend less than three minutes on the subject when you could talk for hours. How about what happens when you have too big an injector, how you get a wet idle. How you match spay patterns per your intake and head. How tuning is done. How cleaning is done. Sharing this is not too much and we are all interested.
Yes, we could talk for hours but the whole point of the Tech Tuesday is to provide very short and basic explanation of the subject matter and, if people are interested, to expand on it in a full length video. So if enough people comment requesting more info on injectors we will expand on that, much like we did with the Nissan CAS.
BTW: We did explain the premise in the very first Tech Tuesday video. th-cam.com/video/J4C_PhdNx6g/w-d-xo.html
Thanks for nothing.
You're welcome.