I was wondering how badly a .81 AR P trim turbine housing would choke off upper rpm flow. This would be a 60-1 on the compressor side for an FD with stock ports. How much of a limitation would this be to horsepower, would it produce close to 400hp at 15-16 psi?

 

.81 is not much of a limitation at all with stock ports. and yes, i'd say a 60-1 will be very close to 400whp at 15psi.

the spool time should be good with the .81 too. i have stock exhaust ports (but streetported intake ports) and hit 15psi by about 3500rpms in 4th gear.

 

how about t72 with 0.82 a/r and 1/2 bridge. is it a good choice as a/r is concerned and also hp ...at maybe 14-15 psi of boost

 

i would probably run a 96 a/r turbine with a half-bridge if you have big exhaust ports... and i cant comment on the power you will make cause i have no experience with that type of setup

 

I'd go larger really with a half bridge. something like a 1.05 or 1.15 but thats just me.