stage 2 heads flow?

[Twin Turbo T]

Would any one know what a unported stage 2 with 2.02/1.60 would flow? I need to know for cam purposes.

 

[KendallF]

I don't think I've ever seen flow numbers for an unported head. I would guess, though, that they would flow around 220-240 with almost no work (intake port match and blend the sharp lines under the seat). I have a pair of radically ported heads done by Chapman and a set of unported ones, and the ported heads don't have huge amounts of bowl work done compared to the as-cast heads. They have straightened and enlarged intake ports, and the exhaust ports as-cast are square and the ported heads are mostly D-shaped.