Engine Issues For R34

[Paulie C]

Hey ya'll, put this thread in the forced induction section on a previous post but no ones replying

Just had a Garrett Gt 30 turbo, 650cc injectors, Z32 airflow meter put in my R34 GTT RB25DET with other mods put in before

Greddy FMIC

Xforce exhaust system

Walbro fuel pump

Turbosmart boost controller

Nistune

Podfilter

Currently running 214rwkw or 287hp. My tuner and mechanic is Andy at Hyperdrive in Malaga W.A.

Now he came across a small issue, that prevented the engine not reaching its potential, as closely as i recall he said that while he was tuning it he had set the boost to 13 but then it would go back down to 9 then work its way back to 13. The power from the turbo doesn't kick in until bout 3000-3500rpm, and he wants it to come on in that mid range of 2000-25000rpm, so that the engine can get what he estimated which was about 310-320hp. Andys told me hes calling up the turbo and boost controller peeps to see what they say, but anyone who has dealt with Andy knows he doesn't mess around with ya car.

Also has a idle issue sounds like the engine wants to stall.

If anyone who knows what the issue is, or what it could possibly be let me or Andy know. Cheers

[XKLABA]

which boost controller is it, i know it says turbosmart but which one, what is the spring pressure of the waste gate, i'm going to guess 8-9psi and if so then get rid of that boost controller and get a good jap one.

i've had both and i don't care what anyone says the turbosmart e-boosts in my opinion are rubbish, i had one do a similar thing to me in the R32 after it was set up by CRD (so set properly), it came out the next day and a HKS EVC5 went in and no more problems

[Paulie C]

Yeah mate its a e-boost street, don't know what the spring pressure of the wastegate is though, have to ask my mechanic

[JonnoHR31]

internal or external gate?

few simple tests to be done first. exactly what does it do with no boost controller (just running off gate/actuator pressure)?

next try a run with the signal line pulled off the gate and see what it does, stop if it goes above ~15psi

this will tell you if its your boost controller or the gate

[Paulie C]

I don't know mate I'm a chef not a mechanic, i can cook a mad feed, but wouldn't trust myself to touch the engine, not my area of expertize, but all these things i will jot down and tell Andy maybe he might know, but seriously keep the info comin fellas i need the help to fix this problem.

[JonnoHR31]

andy knows all this stuff, if hes doing all the work he should have tested that stuff already. but stranger things have happened at hyperdrive....

[bubba]

More info on turbo and exhaust.. is it one of thoe "GT30"'s with a standard NISSAN style exhaust housing?

Does the xforce exhaust have a split dump pipe?

Idle issue sounds like a vacuum leak..