After getting my IK200s, I noticed that in all of the paperwork and specs, Brodix recommends that the heads not be used on engines with boost, e.g. supercharger or turbo.

My question is, why would a head not do good under boost? I probably could call up Brodix, but I'd rather post here to get member opinions.

BTW these are aluminum heads, if that makes any difference.

They are 64cc, which is small for boost applications, but as long as you are using dished pistons to bring the compression ratio down, shouldn't you be okay?

 

Here's my OHpinion: Aluminum heads are prone to hot spots between the exhaust valve and intake valve. Under boost (especially turbo) the exhaust valve and seat have much more heat to get rid of. I think it's probably more that they offer a different head that has better cooling of the exhaust seat and valve than the 1K200s for boosted engines. Boosted engines don't need as big of valves as N/A and they can get more coolant between the runners to cool the spot between the seats. If they have to warranty heads, they would rather you use the other heads for boosted engines.
That's all I can come up with...