I'll take that as gospel then and consider all the information out there as hogwash. Why the heck does everybody waste time and money to use aluminum heads if only to save a little weight and may be easier to modify?
That’s why. Exactly why. They don’t make any more power. Also, consider tooling. When machining aluminum it’s much easier on tooling than cast iron. So the OEM’s love to use aluminum because it saves on drills, taps and other tooling.
The number one reason why guys can’t run compression is coolant temp. 180 should be the maximum coolant temp on any performance engine. Ever.
Guys running above that are wasting power and causing issues like run on.
