My Na Gtr

[JimmyRickard]

So I took my R32 GTR out to Wakefield for the first time today. Towards the end of the second session, i shifted down to second and hit the gas, and turbos stopped boosting. The car was running completely fine, idling properly, and running like normal, except there was no boost pressure whatsoever. I can still hear the turbos spooling when revving over 3500 rpm, but again no pressure. A couple of guys came and had a look but couldn't find a problem in the engine bay. I'm not sure where to start looking, what do you guys think?

Cheers!

[R31Nismoid]

Leaking cooler pipe perhaps?

[wrxhoon]

If she is running very rich ( lots of black smoke) you have a leaking pipe somewhere .

[Ant97GTR]

Also look for a leak in the little vacuum hoses between your boost control and turbos etc.

[Swiper the Fox]

So I took my R32 GTR out to Wakefield for the first time today. Towards the end of the second session, i shifted down to second and hit the gas, and turbos stopped boosting. The car was running completely fine, idling properly, and running like normal, except there was no boost pressure whatsoever. I can still hear the turbos spooling when revving over 3500 rpm, but again no pressure. A couple of guys came and had a look but couldn't find a problem in the engine bay. I'm not sure where to start looking, what do you guys think?

Cheers!

You can hear a turbo...but not the other...you have spat a turbine (exhaust) wheel my friend.

upgrade time

the above two suggestions are incorrect due to the following...

a split/leaking boost control line would do the opposite and actually give you more boost as the pressure to the actuators would be lower and make them not operate at the desired boost level.

a blown intercooler hose/pipe would give you an overly rich condition and have black fuel smoke pouring out the exhaust and make it nigh impossible to rev over 3500rpm.

Edited June 16, 2008 by DiRTgarage

[swanny180]

Also when you blow of an intercooler hose, your car doesnt idle properly.

I blew a hose off my first time at Wakefield so I should know

[ZENNON]

Also when you blow of an intercooler hose, your car doesnt idle properly.

I blew a hose off my first time at Wakefield so I should know

mine didn't even idle at all (blew one first time i went to QR )

[blind_elk]

Look for splits in the IC piping - a split that only opens under boost.

[rb26s13]

grab something solid and tap your exhaust just before the cat.. my bet is you'll hear the exhaust wheel jiggling around in there.. time to upgrade for you.

[JimmyRickard]

Thanks for that guys I think you may be right. there was definitely no black smoke either. We spoke to the guys at Eagle and Raymond and they seem to think the turbines have cracked. Time for an upgrade indeed.

They suggested reconditioned N1s, what do you guys think?

[FineLine]

Check your bov mate. I had a similar prob. The piston had siezed and she became N/A. We pulled it apart on the side of the road and fixed it and all happy again.

[slaughter]

fineline thats a interesting problem good work mate.

bigjimmystyle - lets us know either way mate.

[rb26s13]

Thanks for that guys I think you may be right. there was definitely no black smoke either. We spoke to the guys at Eagle and Raymond and they seem to think the turbines have cracked. Time for an upgrade indeed.

They suggested reconditioned N1s, what do you guys think?

2860-7's or -5's depending on your power goal

[ZENNON]

fineline thats a interesting problem good work mate.

yeh happens when you get cheap sh1t hehehe

[boostin_r33]

sounds like the same thing that mine does only that it's a 33gtst and running 4 pound

[JimmyRickard]

2860-7's or -5's depending on your power goal

Well i'm mainly doing trackwork so i'm looking for response rather than big HP.

Hopefully its not the turbos, don't want to fork out the cash just yet and i'm pretty happy with the job they are doing so far (other than not working obviously ). I'll let you guys know what I find.

Cheers!

[JimmyRickard]

Ok guys just got it back from the mechanics. Turns out it was the turbos, but also the inlet manifold gaskets needed replacing, so I had that done, but am yet to make a decision about the turbos.

I've been told to go for ball-bearing N1's, or change the setup to single turbo.

For a reliable weekend circuit car, what would you recommend?

[JimmyRickard]

Hey guys, I decided to stick with the twin turbo setup. I'm about to put down an order for 2860-7's, and I just wanted to get a few facts straight.

These are bolt-ons correct?

How much HP will they be good for on an engine with stock internals?

What else would i need to get the full capacity out of them?

And when comparing the 2860-7's or -5's, its my understanding that the -7s spool up quicker with less lag (more responsive), so what are -5s good for?

As I said before, i'm mainly after response, so would this be the way to go?