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Originally Posted by SteveR32GTR
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Originally Posted by JohnA
Remember that intake temps consistently below 20C at the throttle will rob you of power. If that is true under boost as well, then you're compromising the engine's efficiency.
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interesting. is that 100% fact even with forced induction?
on various cars ive had i always fit the charge temp sensor at the throttle and the car seemed to go better the colder the temps were, even way below 20degC on some stupidly cold nights (and very good IC/WI setup, lol).
id almost be inclined to say thats true in n/a form where you havent got boost pressure messing with the fuel/air mix, but on turbo cars? |
Have to agree, I have never seen a car go worse with less than 20dec C IAT.
I have in my collection of reports on WI testing one specific one that compares 70 dec C, 37 deg C, and 10 deg C IAT at fixed AFR of 10.57:1 and 11.11:1 with water to fuel ratios of 0, 0.2, 0.4, and 0.6 by mass. The colder the IAT the more power the engine put out, the only time the output did not correlate was with richer mixtures & WI activated at higher ratio's all other cases engine power went up. Boost pressures tested were up to 22psi gauge and tuning to detonation limit via boost pressure increase only (not AFR or timing).