I previously posted:

<<I've found that a good rule of thumb is that a change in inlet air temp
(before it goes into the engine/manifold) is worth about half as much as the
actual change.  In other words a 50F change is only worth 3% or less, not
the 5+% theory would predict.>>

Sorry, I must have been asleep at the time.  Theory (PV=NRT, the perfect gas
law) would predict an approximate 10% power increase with a 50F change,
since on the average you are operating at a temperature of about 500R.  So
George's number of 5% is already taking into account the heating effect of
the engine parts.  As is usually the case, he is right.

Gary Casey