What numbers should a 13b with a T4 turbo on 8psi put down?

 

T4 turbo is way to broad of information to give you an estimate, but for guestimating facts can be anywhere from 200 hp to 350 hp

I think to get a better answer you would need to say what T4 turbo ex. 60-1 , T70, GT42R and setup ( stock motor, ported, etc etc )

 

My apologies, its a T04B and the engine has ported exhaust.

 

8psi is barely breathing. 250?

 

My car with mild street port made 250 hp and 200 torque at ~6 psi with a T04S.

 

how about a stock s5 port with T04B with enough fuel on 12 psi + hks fcon?

 

i just tuned a streetported S5 with a T04B to 281rwhp @ 7psi

you should do fine

 

on my old setup, i put down 274 @ 10lbs, upgraded t04b compressor side, factory back end

 

my bnr stage 3 did 255whp at 7psi, stockport s4 block.. yours will be somewhere between 250-300whp

 

sweeeeeet. i am hoping for 300hp with as low of boost as possible.