Originally Posted by Stu @ M Developments
I always pose the same question though, and to me its "Virtually" this simple...
"What is coolest?"
1) An engine passing "unburnt" air through its cylinders with no fuel added to make it flammable.
2) A burning fuel mixture of any strength whatsoever.
NUMBER1!!!
Like on Autronic managment etc you can run "Rotational Idle" where it cuts the fuel/ign/both (i forget now) TOTALY to 1 cyl at a time rotating between them each time to help cool the car at idle.
Works VERY well, very very well (sounds pretty mad too)
I had actual results once on a modded car (supra or skyline i think it was) of coolant temp drops in a set time with rotational idle compared to normal idle, improvment was huge.