Engine/Transmission (1994 - 1998) gsk4 not turning 4k

[wildmanben]

Like it says, only going to about 3700-3800rpms. Did I adjust them wrong or am I running out of fuel up there? I still have the stock turbo and 215 injectors. Should I step up to bigger injectors like DD4's? Or how about megamentals... Oo.

 

[Bobcat698]

Mine turns to 4000+ RPM with a 180 pump with DDP Stage 4s!

 

[wildmanben]

I am think the DDP4'a will help with this...

 

[Matthug]

The stock turbo is corking it pretty darn good in those upper RPM's, good thing you have studs and O-rings because that drive pressure sure would have popped that gasket.

So upgrade the turbo and more fuel at the same time will never hurt! Go atleast DDP3's and atleast a super 40 turbo or HTB2.

 

[raychem]

You are not going to turn 4k with that stock turbo and that 2 3/4 inch exhaust outlet... in other words you engine ain't breathing. On that note... if your turning that many rpms w/stock valve springs your going to be in for a big surprise withlots of floating valves. Make sure you upgrade to 60 lb valve springs before you attempt to run over 3200 rpm any more.





Richard

 

[wildmanben]

oh dont worry, I got the springs covered. I had those in before I did the gsk4. The drive pressure popped the gasket once. thats why its studded and o-ringed. I am saving up for a bigger turbo at the moment.