Everyone agrees that aluminum transfers heat faster and so we assume it has a measurable effect in an internal combustion engine. Who has tested it in an internal combustion engine and reported the results? All of those "experts" claim something and none of them show any actual tests in an engine. Show me the tests!!!!! Here are mine! Where are yours/theirs?
Iron vs. Alloy Engine Heads - Tech Article - Chevy High Performance Magazine
Comparing Aluminum And Iron Cylinder Heads - Car Craft Magazine