Is 16-17psi on a gt2871r turbo to much boost?!?!?

[crookedcop7]

I have a black top s13 sr20det and recently upgrade the turbo to a gt2871r w/ .64AR, at the lowest setting I'm running 16psi to 17psi, with bone stock internals, presently my mods are:

Greddy v-spec intercoolerGreddy oil coolerZ32 maf Custom intake w/ apexi cone filterHks ss BOVKoyo radiator w/ flex-a-lite fans and Samco hosesTomei rocker arm stoppersNismo 555cc injectorsWarblo 255lph fuel pumpHks grounding kitArc oil panApexi power FC L-jetro A/F is 11.3

The question is will I kill the motor without upgrade the head stud and head gasket.

RWHP 293Torque 302

[redtop91]

No.

[crookedcop7]

thanks for the reply

here's the next question.when do you recommend to upgrade the head gasket and studs?

also what thickness is most people using?

[redtop91]

Head gasket is always good insurance but not always necessary. If you plan on removing the head for any reason, you might as well replace the head gasket and studs... As regards what thickness, I have no idea. I am (was) still using my stock headgasket.

[Twinchy]

Damn no way i that you had to build the head if you upgraded the turbo geez

so with the mods he has above is cool nothing would happen?

Crookedcop7 how many pounds you boosting right now on it?

[karmakaze]

i was running a gt2871r .86 on a stock head gasket and studs @ 17.5 psi for a while. I even went to 20 psi a few times.

the turbo is good for 23ish.

[Twinchy]

Damn no way???

Shoot i was gonna have my head built first before i went to upgrade a turbo.. now that i see this i think im going down this path instead.....

well first i gotta paint my car and get it some new shoes ( wheels )

[eeterp]

You *can* run over 20psi on the stock HG but, it's not recommended. Most people seem to run an aftermarket HG over 17psi. To get the most out of your turbo you'll want cams, which is the perfect time to replace your HG and get some ARP head studs for good measure. Oh, and please don't get a super thick HG thinking you need to lower the compression. 1.1 to 1.3mm is fine. I have an apex'i 1.1mm, fyi.

BTW, what kind of dyno did you use? That torque number seems a bit on the high side for your hp level.

[White Comet]

i was thinking the same thing about the torque but that would be nice

[crookedcop7]

went to pruven preformance in milford,cy (think its a dynojet) also I thought 0.8 was the stock HG size going to a 1.1 wouldnt it drop compression alot?? Also just got a powersteering cooler and thinking about a transmission cooler?again thanks for the replythe car is still there the intercooler pipes keep blowing off there change the clamps went I get it back I'll post the dyno sheet

[crookedcop7]

also to answer your question Im runinng 16psi and a 7000RMP it peaking at 17psi

[Twinchy]

Whoa your blowing your intercooler pipes off?

that isnt good is it?

[White Comet]

my bros mr2 blew off the ic pies once or twice

[Twinchy]

in such cases what happens when the pipes blow off?

sorry for the noob question but i wouldnt want my pipes blowing off if i were to be punching on the freeway or somthing

[redtop91]

Your car will stall. Nothing major but if you have no tools to reconnect the piping you'll need a tow...

[white90esex]

deamn... 290 on 17psi.

My friend is making 316 on 1 bar with the gt2871r, 555cc injectors, and a tune. Everything else is just the manditory crap that youd run.