At what boost does your ceramic wheel crap itself?

[Freeman]

Hi ive heard if you put the boost up too high the ceramic turbine wheel gets spat in pieces either into your engine or into your cat. This doesnt sound good. What boost level can your 33gtst be put up to without this happening? And is it possible to upgrade to a steel wheel, because this *sounds* like a better idea. If not why not?

[MADGT4]

Answer is yes it is bad! Basically rule of thumb in my book is nothing over 1bar!

And next answer is yes it is much better to go to steel wheel for a number of different reasons.

[paulr33]

over 10psi will kill the exhaust wheel on the stock r33 gtst turbo. you can get it changed to a steel wheel, its called a "hiflow" where they give the turbo a new bearing pack, new compressor wheel, new exhaust wheel and making the exhaust housing a little bigger. it makes more power and has around the same amount of lag as the stock turbo but can sustain more pressure (aka more heat cos its steel wheeled). gcg.com.au can do a hiflow for $2000. if you want to just change to steeel wheel you could ask them how much

[hanyou]

im running 13psi on stock turbo (series 2 gts-t) got avc-r tuned at bel garage and they jus said not to go over that.

[lwells]

There is no magical limit. It depends on everything from your car's health to driving style to whether the turbo is a Friday special. The safest boost level is the stock boost level.

12 PSI is usually quoted as the "safe" maximum, but don't come crying if your turbo lets go at that boost level

[Bass Junky]

It's not so much a boost thing as it is a heat thing.

You can run 1 bar on a stock turbo and stock management and not have too many problems. The Computer will just do the rich and retard thing and the fuel cools everything.

Then you can run 12 psi and lean out the mixtures with a PFC or similar, and the exhaust wheel will go on a little journey.

It mainly happens when on boost for extended periods, say at the track when heat builds up and causes the ceraminc wheel to delaminate from the shaft.

BASS OUT

[Freeman]

Excellent information thanks guys. Shows how much i know i thought hi-flow was when you cut back the fins on the turbine. Doh.

So same amount of lag but more power? iS that more power freed up or more power because you can up the boost more? If its more power, how much are we talking about?

Thanks again

[Bass Junky]

Cutting back the fins can be a remedy for a couple of things, not sure what, but definently not for high flowing.

High Flowing includes replacng the wheels, and the bearing pack and machining out the housings, giving you the ability to produce more boost, because the wheels are bigger.

That's the simple answer.

[r33GTS-t-200kw]

if you have been in any big turbo cars, IMHO i think that pulling hard from 3000 to redline feels much better than a big rush with only 2000rpm to enjoy it if you know what i mean.. thats why many opt for a high flow. Response is your friend

[The Mafia]

I have a powerfc, stock turbo, and the car is making 210rwkw.

Its a Series II 1996 GTS-T. been running 12psi for 18 months now, and I drive the car fairly hard, and are always on boost.

Turbo is still great.

[fLipKnot]

I have a powerfc, stock turbo, and the car is making 210rwkw.

Its a Series II 1996 GTS-T. been running 12psi for 18 months now, and I drive the car fairly hard, and are always on boost.

Turbo is still great.

Dude,

just with the powerfc,stock turbo and u r making 210 rwkw??!?!? I'm sure u have other mods yeah? :boohoo:

[Bass Junky]

different dynos different readings

[The Mafia]

Dude,

just with the powerfc,stock turbo and u r making 210 rwkw??!?!?  I'm sure u have other mods yeah?   :boohoo:

FMIC, Shielded pod, Stainless Turbo to afm pipe

Full custom exhaust, Split Dump, flows very well

PowerFC

Stock Turbo @ 12psi and bleed valve

Iridium Plugs

Toluene (10% mix)

Tested on 2 dynos, both had the same reading.

[Bass Junky]

Evil Torque curve.

[97Sky]

I have mine boosted to 10psi with only an exhaust and stock cooler everything is fine but I wouldnt go any higher without a FMIC. mind you I dont drive mine hard very much.

[r33GTS-t-200kw]

i can run mine on 11 or .9 bar.. only use .9 bar for racing, 11 pound for street... its done like 60,000k's on it and still no shaft play or seals ****ed.

[race_snooze]

I have seen so many threads about this now, my 2cents you cant run more then 10psi stock as the ecu will cut you, thats my understanding. So if you have a remapped 32 ecu, PFC, piggy back or what ever, and the other supporting mods fmic, exust, induction I cant see why you cant run 12 to 14 all day every day on a safe tune, what i mean by that is a rich tune not leaning out or timing not to advanced.

I run my r33 gtst with remapped ecu by NERVE fmic, HKS pos, apexi exst at .7bar and .9 when i want to race and always on BP Ult fuel, and the last Dyno day on a dyno dynamics dyno I reached 216rwkw ask any of the ACT SAU crowd and that was on .7bar or close to maybe about .75 close to 8 before you all jump up and down saying bull shit, I am unaware of any other mods, but sure its only a stock turbo as it was off recently.

Oh last thing Dynos are for tuning not real power out put

[fresh]

my r33 made 219kW at 1 bar, happy as, runs sweet, flat as boost curve, and hauls ass

[hayai32]

Yep I aggree with the other ppl who have said this... there is no hard and fast rule as to how much psi is safe. depends on age of turbo and driving conditions.

I run my car on 14psi on the street and for more spirited driving I put it back to stock (arround the 12 mark) to make the exhaust wheel "less" likely to end up in the cat. It will die someday but it's been nearly 2 years now and they are cheap anyway so it isn't that big of a drama... I hope.

I am not sure if you can set an r33 turbo to 10 psi... I know that with the r32 stock turbos the stock actutuator won't allow less than arround 11.5/12 ish psi. Dunno about the 33 turbos but I'm guessing they wouldn't be too different. I'm no expert though all I know is that with my ebc on my 32 I can't go below 11.5 psi. My 2c

[siksII]

i run no more than 10psi (with pfc)

with stock ecu u can run whatever u want higher than that, u will find the the ecu will run rich and retard the timing so running higher than around 10psi boost will make u less power anyway so no point.

as an example, atm my air flow meter(stuffed) reads too high, so my stock ecu goes r&r even at 8psi, however it cuts in much earlier at 10psi, so the car actually runs better at 8psi than 10psi.