I like the fact that the stealths are aluminum and you can run 10:1 compression ratio and and it does not detonate. Can’t do that with iron heads and pump gas very easily.
With flow and all other things equal an aluminum head needs almost a point higher compression to equal the power of the iron heads.
Not true and if you have documented evidence to state otherwise I'd be happy to see it.
Hotrod ran a comparison of an AL head vs an FE head, they saw nothing to support any of the old wives tales about AL needing more compression, or FE being more sensitive to detonation.
https://www.hotrod.com/articles/ccrp-0602-iron-versus-aluminum-cylinder-heads-test/What I think, and this is only supposition on my part, is that the reason AL heads got a rep for being more detonation tolerant, or even for making more power, than an iron head is that people were taking iron heads designed in the 50's, 60's or even 70's and comparing them to modern design heads that happened to be made of aluminum. I firmly believe that the combustion chamber design and port improvements account for the differences, not the materials chosen.
