ProComp/Speedmaster aluminum heads

That’s a good point and what YR hints about. Numbers aren’t everything and for fact can be misleading and a poor choice if chosen strictly by the numbers.
But I’d still like to know them.
I guess nobody flow tested them.

I guess it’s classified information that is above our pay grade. I realize some of these guys make their living by porting heads. Maybe it’s a simple fact that when they hand port the heads they can’t get the numbers CNC porting can get or their numbers are better,if they have 1 to compare it to. Wheather they compare to an Eddy is anybody’s guess. Kim