Originally Posted by
andrewr
Adding fuel when you are limited by O2 (rich) means that the amount of energy released is reduced. Listing other factors that also result in a cooler engine doesn't change this fact. I'm not arguing with those factors - just the proposition that fuel doesn't cool. It does, unless you are LOP.
Just re-read your post and must comment on this. You might think it's semantics, but cooling refers to dumping waste heat to the environment. Running rich is not chemically generating the heat in the first place, so to call it cooling is disingenuous.
Sure, it runs cooler, but it isn't
cooling any more than reducing the power level is cooling.