i need some help deciding on which turbo would be best for my setup.

heres a run down of my setup.

ls vtec.
81.5 mm bore
approx~ 9.7:1 CR
wiseo pistons
eagle rods
stock gsr head
3" downpipe
3" thermal exhaust

my previous turbo was a turbonetics .70 to4s compressor 4" inlet, 2.5 outlet

turbine was a stage 3 .48 a/r

this turbo took a **** so im replacing it with a master power unit.
my goal is approx 350- 400 hp the most

my question is should i stick with the super huge to4s compressor or should i get a smaller compressor for my setup?

btw, i stepped up the turbine from .48 to .63 a/r.

thanks for the input.

 

The compressor A/R or size has very very little to do with how the turbo behaves.


It does decrease inlet restriction though by having the bigger inlet.

 

so stick with the big compressor?

 

it will be fine, i had a very similar setup with the same size turbo, it was a 5000-8500 rpm powerband