I've read all of the related bypass valve posts and haven't found an answer to my question. I already own a race bypass valve but haven't installed it yet. I don't know how much boost the engine will actually see b/c I've changed my setup somewhat. I'm guessing I'll be seeing somewhere around 13-14psi with the s-trim. My setup is 7" crank pulley, 3.00" blower pulley, 218/230 XE cam, ported heads stock valves, 355 cid, 58mm tb (plennum holes are still 52mm though), and I'm fabing my own hard intake pipe since I can't seem to get a brad brand intake pipe.

Thanks for any advice in advance

 

TTT, I want to know too. They have a CFM rating, but how do you judge when to step up to the Mondo?