Hey so im just wondering how good of a power band does the 60 trim offer with a gsr. The specs are below
-ported and polished head
-supertech valvetrain
-ctr cams
-victor x manifold+70mm sk2 tb
- block bored over .25 by previous owner and running forged pistons
-ramhorn manifold
-open dowdownp and dumptube
Thats just pretty much of the things i have but of course i will be running 750cc id injectors and be tuned on chrome pro. Could it be possible to hit 400 with that turbo ? TIA

 

Yes, but you'll be at the limit of 93 octane. If you have knock-resistant fuel of some sort, you can push a bit more boost pressure to do it. After about 23psi or so, though, its done.

The rest is based upon fuel injectors, pump, the knock-resistant fuel you chose, and how well the car is tuned.