ProComp/Speedmaster aluminum heads

318willrun said

I guess this is the deepest I've ever thought into the theory as I've always ran iron heads on my old rides. I'm glad this conversation has happened, because I see my thoughts with aluminum heads had holes in it. :D Do not mistake this as I opposed aluminum heads, because I do not and may run some soon in my own future.

thanks to all that took the time to work through this conversation :)

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I'm no expert at all, and will also run alum heads in the future, but the whole iron/alum myths have always bugged me because so many things get repeated without backup info.

Combustion is complicated, and alum vs iron definitely has an impact but it seems to be in different ways than 'common sense' would seem to suggest. I'm still digging through the occasional engineering or research paper where I can - always fascinating stuff to find.