Originally Posted by speedracerntrixie

You two are hilarious. First off yes with more nitro you must run a richer needle setting, that we can agree upon but that's where it ends. To produce more power you need the bigger bang, that bigger bang comes with more heat. BTUs equals power. Bottom line is the higher nitro percentages do not lead to cooler running engines. My YS 115 runs noticeably hotter running 55% nitro then it does 30%. This is not theory, it's a fact discovered through real world experience. As for R/C car engines compared to airplane engines the principals are similar but the way the engines are loaded is much different. An engine with a prop is going to have a greater load. When we are talking about glow engines, load can be factored in as a component the influences ignition timing. This is why car engines can get away with less oil content. Before the Suzuki GSXR went to liquid cooling they had a design feature that literally squirted a stream of oil on the inside skirt of the Pistons to aid cooling. Usually I dislike using other engine technology in these discussions however the air cooled inline four has much more in common with our model engines then a dragster engine.

Top op fuel and funny car dragsters as an example is just ridiculous and grabbing at straws. The methanol doesn't cool the engine. For one they are running for a very short amount of time. Let one sit at a 4,000 rpm idle for 10 minutes and see what happens.