[QUOTE]Originally posted by Tanqueray
[B]

I don't think that this second part is true.

 

[QUOTE]Originally posted by Tanqueray
[B]

Sure, they correct for air density (altitude, temperature) variations.

 

it is supposed to... but it's hard to say how each car reacts to the different weather situations. The thing is, I think the corrections are something like "for every x degrees, car should be making y more power".

But I donno... some one commented to me that the dyno was in STD not SAE, therefore not corrected. But I asked carboy and they said it was infact correct. so I am not sure.....

-shing

 

Best performance/Cool dry Air! 0-30% humidity @ 60-65 Degrees @ sealevel. (Ideal) Colder is denser. You notice this dramatically in two stroke engines.

Worst performance/Hot Humid Air! 45-100% humidity @ 85-whatever @ anything above 2500'.

 

[QUOTE]Originally posted by JRM
[B]Best performance/Cool dry Air!

 

Hot is bad - cold is good;
Cool air not only improves air density (mass O2) to the engine but also increases "thermal efficiency" of the engine.

Hot and Humid is bad due to temperature but Humidity is OK;
I am sure you have noticed how an engine tends to feel stronger on a rainy day. The water vapor in the inlet air expands as the combustion process takes place augmenting the pressure increase in the cylinder delivering more torque.