ive been boosted for a couple months now at 10psi on my z6. its fun, but i want more. i dont feel safe upping the boost on the on a stock motor. i can getg ahold of wiseco pistons cheap and tuner toys rods.
what would be a good size turbo for my setup? i wanna run 1bout 15-18 psi. any thoughts are great thanx

 

look into precision turbos, but if you're gonna redue the motor you need to sleeve it because the d series sleeves are weak and over 10 psi they shift causing headlift.

 

im not wrried about head lift to much. im gonna use new arp ****, and plenbty of guys run above 10 psi and are fine. hell, ive seen stock motors run 13psi and do fine. just wanted some opinions on turbos

precisions are nice, but the ones that ive seen all look way to big, my little d wouldnt spool a slug like that for a while. i was thinking of some sort of t3/t4

 

Might wanna try the t3/t4 .50 trim or the .57 trim...

 

Check out the specs of a precision sc44 for your setup.