Review BONE STOCK vs Injen CAI same day dyno fun
02-24-2009, 03:32 PM
#126
So whats the verdict? Stillen or Injen gives more power?
The way i see it:
Stillen:
Pro: Filter is higher up and in better location
Con: Have to cut radiator support
Injen:
Pro: Slightly better power gain
Con: Chance of hydrolock and need new wiper fluid container
The way i see it:
Stillen:
Pro: Filter is higher up and in better location
Con: Have to cut radiator support
Injen:
Pro: Slightly better power gain
Con: Chance of hydrolock and need new wiper fluid container
02-24-2009, 03:43 PM
#128
Cut radiator support? What?
I think hydrolock is debatable. I'd rather replace a new wiper fluid bottle (less work and can return to original) than physically (permanently) cut OEM parts. I like both intakes. Look for my next review, I'm gonna have Stillen on 1 side and Injen on the other.
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I think hydrolock is debatable. I'd rather replace a new wiper fluid bottle (less work and can return to original) than physically (permanently) cut OEM parts. I like both intakes. Look for my next review, I'm gonna have Stillen on 1 side and Injen on the other.
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02-24-2009, 04:29 PM
#132
Buy me a Stillen gen3 and I'll get back to you 
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02-24-2009, 04:29 PM
#133
What i was saying is that the power gain shown could be from the leaning out of the fuel due to the new intake just being put on. From my tuning experience on american cars which are not nearly as smart or technical as these cars, when you first put a new part on you can show gains like this but your computer will compensate by adding more fuel to the motor since it is now getting more air. The only true way to go back to back would be by reseting the ecu letting it relearn the air flow and seeing how much power you make after this.
Now if you have a after market tuner you can keep this "lean" mixture indefinantly and keep the power
Now if you have a after market tuner you can keep this "lean" mixture indefinantly and keep the power
yes that is where you get your HP from.... stock + injen got ucla 16.5 due to leaning it out... I would bet alot of money that if ucla did a stock + exhaust dyno he would get around the same numbers +/- a couple. and again Id bet alot of money that if ucla dyno his car with exhaust + injen he would get around the same numbers as well....
A/F ratio is where its at with this car. If you want power... get a power adder...
A/F ratio is where its at with this car. If you want power... get a power adder...
I know what you guys are saying and I had the same concern. But that is all under the assumptions that our ECU learns/adjusts slowly (which is why someone would suggest a reset) and that the A/F ratio after adding the intake will be way off ( if reeaally lean) so you'd want to request more fuel via a resetted ECU.
But our ECU is very smart and acts very quickly. It starts thinking and working right when you turn on the car, which is also why it's so hard to get power from it. I think when people say "you'll run lean and it can damage your engine" it scares those that not sure what you mean by lean and HOW lean are you defining "lean". Stock A/F runs a bit on the rich side so any small margin can be compensated and allows the CAI to draw power. I don't want to get into an epic debate about resetting the ECU (our ECU is extremely intelligent) but with my understanding, it is not needed with this CAI, cannot speak for others. There are a lot more (techy) reasons to support my finding but I'll leave it at that.
Details I left out:
The place I went to for dyno (SP engineering, very big in Supra community, I saw M6, 2 GTRs, and NSX, and a few more high end cars being worked on, some engine swaps) charges $$$ for dyno time by the hour! The cost per hour is in the hundreds and I was there for a good few hrs since the install was done on the dyno as well
. Also we all know that Injen's CAI is not that cheap either. So, I made an effort to find out everything I can, talking to knowledgeable, credible tuners that I know, to answer every questions that I HAD. I like to know everything there is to know when I invest this much time and effort into something. Most of all, I had to believe and know how it worked before I can share all this with you.Now go outside and give your G a hug for its awesome ECU
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Last edited by ucla bruin; 02-24-2009 at 04:43 PM.
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abrecos (07-26-2022)
02-24-2009, 04:42 PM
#134
Registered User
yes that is where you get your HP from.... stock + injen got ucla 16.5 due to leaning it out... I would bet alot of money that if ucla did a stock + exhaust dyno he would get around the same numbers +/- a couple. and again Id bet alot of money that if ucla dyno his car with exhaust + injen he would get around the same numbers as well....
A/F ratio is where its at with this car. If you want power... get a power adder...
A/F ratio is where its at with this car. If you want power... get a power adder...
The power gains from a cold air intake comes from the cold charge air. Since the air from the CAI is colder than that from stock intake, it has a greater density. If you increase your charge density you can increase fueling and still operate around stochiometric (14.7 for gasoline I.C.).
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abrecos (07-26-2022)
02-24-2009, 04:45 PM
#135
Stoichiometric ratio FTW.
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