Iam going with a single upgrade looking for 450hp at about 1bar. On the stock turbos i was running 550p and 1300s My ? is can i run my ported secondaries 1300 in my primary with 1600 in secondary or would that be overkill should i just get 850p 1600s.

 

I've had no problems with 450hp on my 850/1600 combination. Might want to consider adding another pump though. Run duels intank.
-Nic

 

Kool thanks . I was planning on running two cosmos in tank since i have one in there already . Did you use the stock hard lines with an added return?

 

I run 1300cc primaries and 1600cc secondaries, and two walbro pumps. The car hasn't been tuned yet, but there shouldn't be any issues, I know of people who run 1680's on for all four injectors. Just make sure you tune for it