I will try to explain it in layman's terms as the OP is at a NASA level, so try not to laugh at my cave man explanation!


E85 will lower IAT's because it injects on average 30% more fuel then standard fuel for said hp. The extra fuel absorbs the heat in the combustion chamber lowering the IAT and making car go FAST....REAL FAST....FAST AS A VOLCANO ERUPTING, faster then a Saber Tooth Tiger dinner running for it's life from a spear......

 

 

Funny but not completely accurate.

IAT sensor is WAY up the chain and completely separated from the combustion chamber.


The reality is that to the IAT temp sensor it does NOT see ANY difference in measured temperatures on ethanol vs gas but you can pull MUCH less timing without risk of detonation so you significant increase power.

 

It will cool the runners a tad where the fuel sprays, but obviously, it wont have any effect on the air entering the throttle body. In the cylinders, yes-- much cooler.

 

EXACTLY!


That is why I said, "The extra fuel absorbs the heat in the combustion chamber...".


Thxs turboslut




93ls1rx7, you are correct that more accurately IAT is before, but 99% others understood the caveman explanation, "The extra fuel absorbs the heat in the combustion chamber..." & all intake air would ultimately come from the intake and fill the combustion chamber. So what air is in there, the extra E85 (30% more) absorbs the heat from the intake air that came into the combustion chamber lowering the temp......considering that it was a caveman explanation and the combustion engine would not of been developed yet, I am a genius ahead of my time!!

 

side question:

Is methanol usually injected before or after the IAT sensor?

 

Meth is typically injected in the forearm, sometimes the to.... err I mean... typically injected in the charge pipe directly before the throttle body. As for the IAT sensor, it varies from car to car, and can be anywhere in between the air filter, and the throttle body.