any body out there able to give me a rough estimate on hp i should acheive using the following parts s5 13bt. s6 manifold, streetport,550 primaries 720 secondaries ltx8, hugh front mount and a to4 .60 a/r cold 1.15 a/r hot at 12 psi i ask as have never had experience with aftermarket turbos before any help would be appreciated

 

Max 400hp with the 550-720cc injector combo... Go for a little bigger secondary injectors if you want to be on the safe side!

 

I ran mid 12's on a street port moter ,big fmic ,60-1 turbo ,3" down pipe ,ported intake (upper and lower),550 prim,720 sec,safc,10psi,at 375 at rear wheeles