I just bought a friend's turbo kit and have a few questions.

the set-up

stock gs-r head
gsr block:
low comp 9:1 compression forged pistons
forged rods

turbo setup:
garrett a/r .60 turbo
spoolin performance log manifold
3'' downpipe
38mm tial wastegate
550cc rc injectors
greddy bov
2'' charge piping
gm 3 bar map sensor
walbro fuel pump

i wanted to know how much boost can i run on 91octane and at that level of boost would i bigger inejectors?

also wanted to know if arp headstuds are completely neccessary?

what happens if i want to run 100octane, how much boost can i run with that and what other upgrades would be neccessary?

what clutch would be suitable for my hp range as well?

sorry if these are faqs but i have tried to just search around and i see other people setups but i'm thinking they might leave out some of these things because its common sense or something. well, thanks in advance.

 

bump

 

what is your power goal?
what are you gonna be tuning it on?
a lot of this depends on your tuner.

 

550's will only get you to about 300WHP maybe a little more

so roughly 10-12 psi


you ran run more boosten given you have larger injectors. we've made 500 on 91 pump gas

but your turbo is good for only bout 450ish- get some 880's and we can tune your car to do 400 all day ( given you're in nor cal)


get the ARP head studs, they're cheap and recommended.