Yes, this is the change in air temp as it leaves the manifold and is heated by the intake chamber as it is going into the cylinder. Kinda tough to measure on the fly. <g> I don't have an air temp gauge right next to the intake valve.

Walter


On May 19, 2005, at 11:58 AM, Craig Berland wrote:

Consider that cylinders that run 50d cooler - - can make more horsepower
than the cylinders running 50d hotter.  
Better volumetric efficiency. George 

And the measure of that would be?????????  Scott
 
The measure is "manifold air temperature".  If the manifold air temp is lowered 50 deg F, then the power would increase 5.8%.  That is of course if the proper A/F is maintained.  I believe there are to many variables to predict what a 50 deg cylinder temp drop would do to the manifold air temp.
Craig Berland