it would be going on a b16a stock internals, want it to still spool good for street use but also want to make really good power, like 9-10 psi on the street and maybe 15 psi with a good tune at the track, im thinking a t3/to4e with a 60 trim .60 a/r compressor side, but would the .48 a/r or the .63 a/r be a better exhaust side? what would the difference in spool time be between the two?

 

the 48 will spool much quicker

 

15psi on stock internals? i dont know about those engines but i know if i did that on my stock internals it'd be bye bye engine hello big empty hole in my wallet.

 

with a good tune, i think it will be ok at high boost temporarily

 

Just run your 9-10 psi... dont get stupid with it,a broken rod sucks.