I'm stuck on choosing a hot side for my 3rd gen.... First of all I used porting templates from Pineapple Racing, their medium size for intake and exhaust. The turbo I will be running is a precision billet 6768 bb. I want to match the exhaust housing with my manifold which is divided. The divided a/r choices I have are .81 or 1.00.

The car is for the street and if I had to decide between quick spool or top end, I would choose quicker spool.... I will be running around 20-25psi with water injection, pfc and other supporting mods.

I know this really belongs in the single turbo section but wanted to here from guys that have single turbos in colorado with the higher elevation and want to hear your opinions and thoughts. Thanks

 

I've run sinlges on ported engines here in Albuquerque, which is 5500+ ft elevation. If you want nice quick spool, the .81 will be great. The 1.00 will work good, just may raise your spool time by about 750-1000 rpm...