GTR Boost Experiences

[JayDee]

I am not wanting to go wild with my R32 GTR but do want to increase boost to a safe level. It has the standard ceramic wheeled turbos. I am hearing many varying opinions on safe boost level with some people saying up to 18psi.

I am wanting to know at what boost any people have experienced failures. For example, if nobody has had a failure at 14psi then I am happy to boost to that level but if ANYONE has had a failure at that boost then I won't go there (just to be safe).

Hopefully we can come up with a level that will allow me to sleep at night.

[meshmesh]

This argument is always debated, however as far as I know.. the limit of the stock ceramic turbos is around 14-15psi... you can safely achieve this by removing the restrictor. Other have run much more, but the argument is not IF but when will your ceramic turbos give in, and risk further damage to the motor by debrit.

[Sydneykid]

I'm with Mesh, 1 bar is rule of thumb we use.

[ferni]

my turbos have been running ~1bar (14-15psi) for over 20,000kms, no problems...

Best to get a tuner to do it, make sure the A/F ratios are safe etc...

i think jezzr (he posted about running an 11 on stock turbos) is running 18psi

Also depends how your driving, I don't think 1bar on stock turbos would last long on the track (correct me if i'm wrong?)

Daily driving 1bar should be fine

[gtrken]

Drift day at Collie on the w/end.

1 bar at 8200rpm ( damn these Jap rechips !)

Goodbye one turbo wheel

Cheers

ken

[JayDee]

Bad news Ken! This was on your R32 I assume and only at 1bar. I vaguely remember you telling me at your shop only a couple of days ago how there is definitely no problems at 1 bar, just kidding!

Incidently, you know how you had my GTR on the Dyno and it ran up to 8200(rev limit???) and slight boost increase to 10psi which lead you to believe it had computer work done. Well it would seem that you were right. I pulled the computer side kick panel off and it has a Mines tuned computer with their serial numbered gold guarantee sticker on it with tamper seals that haven't been broken. It would be very interesting to see exactly what has been done to the car. I would have thought it a bit strange to have it Mines programmed when as far as I know there is only a 3inch exhaust on it and only producing 263rwhp.

By the way if any of you guys are in Perth, Ken did a pre-purchase inspection on my GTR and he is a great bloke to deal with and the inspection was very well priced too. He really knows his GTR stuff (except the safe boost level on std turbos )

[Rowdyr32]

I've got a 32gtr engine in my gtst and I was wondering if its worth buying a factory boost controller and hooking it up. How well do they hold boost, do they spike? I know an aftermarket one would probably be better but are they worth the extra money on a stock motor? I am a tight ass!