plastic vs ceramic turbo

[cul202]

series 2 r33 turbo into r32....

are the plastic wheel R33 turbos more or less fragile than the ceramic jobs? do they bolt up the same?

will it be a better option than the series 1 as an upgrade on my 32 running std 32 boost (10psi)

[KamikazeR33]

ben these turbos can run upto 12psi boost, where as the s1 one can handle about 1 bar (these both at safe levels)

ive been told the extra few psi wont make a huge difference on this size turbo

the flange is exactly the same (t3)

plastic wheel lets it spool up quicker then the s1 cermaic turbine

[rbs13]

plus if it does seperate n stuff.. itll melt by the time it gets to the motor.

[Sydneykid]

OK guys I'm confused. The R33/R34 turbo still has the ceramic turbine wheel, it also has a plastic compressor wheel instead of the steel compressor wheel on R32/R33. I have never seen the plastic compressor wheel fail, but I have seen plenty of ceramic turbine wheels end up in the cat.

I have found no better or worse reliability, both have ceramic turbine problems at more than 12 psi and excessive heat (as in a few laps of a circuit) makes even 10 psi a gamble.

Hope that helps

[Boost King]

What about the shafts of the turbine, ie connecting the 2 wheels. Do these ever break or shatter? Once you do a compressor wheel (the ceramic one-hope thats right) dont they shave a couple thou off the shaft, put oversise bearings and a new steel wheel. Wouldn't this make the turbo subject to further failures, maybe along its next weekest point, ie the shaft.

Becuase once you hi flow a stocky, and have 2 steel wheels on it, what else could cause a failure?

[TTT]

cul202..

you've got 1 thing confused..

The Series II R33 and R34 turbo's have a plastic (it's a form of plastic) Compressor wheel (on the front of the turbo) and all skylines from R31 - R34 have CERAMIC Exhaust wheels (back of turbo)

the difference between the series I and II is that the series I had a steel compressor wheel.

I've had a series I on my R32 for over 6 months running 13 psi with no problems.

I will be running 14-15 psi when I get my ecu chipped.

hope that clears a few things up for you.

[cul202]

thanks peoples.

i originally thought that both wheels were ceramic on the early turbos & then ceramic turbine/nylon compressor on the later turbos.

a bit silly of me really as ceramic wheel exploding into the engine is obviously worse than exploding down the exhaust.

the main quiery was one of reliability, which at the boost i intend to run, doesn't sound like a problem at all!

[Driver]

What is the r34 stock turbo max power rating in HP?