hp loss from high air temps?

[Murf]

Ok I have a question for those that have exp. on dynos. My question is how much hp loss will you see give a specific temp increas over a base power out put?
example X car made 333 whp @ 75-80 deg. F. ambient air temps X car makes run on another dyno (same brand) but air temps are 110 deg. F how much hp loss would you expect to see?

[honki24]

Originally Posted by Murf

Ok I have a question for those that have exp. on dynos. My question is how much hp loss will you see give a specific temp increas over a base power out put?
example X car made 333 whp @ 75-80 deg. F. ambient air temps X car makes run on another dyno (same brand) but air temps are 110 deg. F how much hp loss would you expect to see?

That requires a lot of math so my educated guess: maximum of 10hp for a 30degree increase. Bumping into the knock threshold would be of more concern than hp loss. You'll lose more hp if you knock and the ECU pulls timing. You have to remember that we're FI here... so initial intake temps make a difference but not as big since the temp increase from the pressurization is so much more than you will see simply from weather change. Technically, if your octane were unlimited, or you were far enough from the knock threshold you could just push up boost a bit to compensate for the decreased density of the intake charge... So really the question is, "on the stock turbo what boost can be run in X conditions and what power will that make, versus Y conditions?" Your question then becomes much more complicated.

[Murf]

Not really looking to complicate things so the same car, same dyno, no knock. How much hp loss should be expected from 75-80 deg. ambient air temps to 110+ deg ambient air temps.

[Turblown]

Thats G-18 classified.