Big boost on pump gas with supporting mods?

[1990TTZ]

So i have gt600r turbos from z1, the big intercoolers, 555cc injectors, cattless exhaust.full z1 setup, dual mas air translator , 2.5" intercooler piping, z1 eprom, divorced downpipes, and a apexi avcr controller. Its making 385 rwhp @13psi slightly rich too. Should i b safe running 18-20psi with this setup or even more with 100-110 octane gas?

[Ziggy1621]

It's not really a matter of can it be done, but can it be done often and safely. IMO, I wouldn't force more air into it until you put more fuel. I would go for the 740s before pushing that kind of boost, then you will be perfectly safe at those boost levels. Just my 2 cents.

Couple questions, what do you mean by full Z1 setup? Also, who told you it was 385whp on 13psi? With those mods, people are seeing less hp on more boost, so not trying to be a D, but that seems a bit high.

[1990TTZ]

Full z1 exhaust straight pipes from downpipes to tips
I have the dyno papers i did the pulls on the dyno at the local speed shop they have a nice dyno jet and plenty of race cars it also making 345rwhp at 10psi witheverything iv got

[NolimitZ32]

I could believe that whp from a dynojet. Hell a Dynapac would probably show north of that.

[1990TTZ]

So i take it i have a healthy setup these are really good numbers i take it. i was running 18-19psi on stock turbos with a worn engine with this exact setup running 12.08-12.16 in the 1/4mile

[NolimitZ32]

18-19 on stock turbos is extremely inefficient and not very good for the engine. Your setup seems to be fairly healthy but the numbers are still a bit ambitious at 385whp. Doing the (very) rough math, if the gt600 kit is supposed to make 600bhp at somewhere around 1.6 (~24psi) bar then at 0.88 (13psi) bar the volume of air going through that compressor is somewhere around 65% which puts you at 390bhp minus the 15% drivetrain loss = 331.5. now mind you this is all VERY ROUGH math and all my numbers are +/- ~25% but as a general go-by yeah your setup looks like fun. Don't let dyno numbers run/ruin your life. The most accurate and precise dyno in the world is your butt dyno because at the end of the day the most important thing is enjoying actually driving your car.

[1990TTZ]

Oh yeah its most definatly a fun ride. 2nd gear dosnt stick know matter how hard i get on it rolling into the throttle or matting it itll lay sideways on any dry day sometimes 3rd will roll smoke from the tires when matting it