help, looking to build a bad a$$ 6-port?

[NoDOHC]

Originally Posted by RX200013B

for ITB's, would 4 38mm throttle be big enough?

for a SP or even a half-bridge?

I don't know what manifold you would be using, but I think that 38mm would be a little small for the secondaries (plenty for the primaries).

I saw a couple builds and they both were using 3 48mm TBs, one for the two primary ports and one for each secondary port.

3 44s would probably be sufficient.

This flows about the same as 4 38s, but the flow into the secondary ports is a lot higher than the flow into the primaries and needs the throttle sizing to be correct.