well going to be rebuilding my motor, and i was wondering what size streetport i should get. i have an apex rx6 single on there and i want to hit 400+whp by 15-16 psi. i have been looking at some large ported motors but i am not sure if it will be overkill for the turbo. any help apreciated.

 

anyone....?

 

rx6 is small.

I'd say cleaned up intake ports and mild street ported exhaust. I don't know the A/R of the turbine housing for that turbo, but maybe look into a size bigger to support your goal.