Highest safe boost for stock r34 turbo.

[infected flow]

hello ed , well i have to back him up and say 10psi is the max for a r34 as we told coxy ...lol and we told him so ........!

does your car still feel dull ed ....lol

[Kaido_RR]

i dont know about a r34 but a 33 can handle around 12psi, after that the turbo doesnt make anymore power, so i would say around that mark would be the same for a r34, saying that i never boost above 0.7bar

[infected flow]

geez umm let me just say a r34 is not a 33 so they are different right ! there turbo's are also different right!

the max for a 34 is 10psi.

[lwells]

I think people should stop stating what the max for all turbos of a particular revision are based on what they have observed with their own car. There are way too many variables including (but not limited to): age of car/components/turbo, how you drive your car (street, track? oh long on boost?), etc, etc.

Stating that x turbo is good for y boost is not a good idea.

LW.

[Cubes]

I think people should stop stating what the max for all turbos of a particular revision are based on what they have observed with their own car. There are way too many variables including (but not limited to): age of car/components/turbo, how you drive your car (street, track? oh long on boost?), etc, etc.

Stating that x turbo is good for y boost is not a good idea.

LW.

The tune also makes a big difference..

If it is running rich it will keep the EGT just that little bit cooler, in turn you are able to push the turbo just that little bit more.

Heat is the biggest killer for the ceramic turbo's, thats why they even let go on standard boost at the track.

[wrxhoon]

jaydee ,in most cases pieces of the ceramic turbine of the gtr turbo will be sucked in the engine and it makes a big mess so u dont want one of these to let go , you are looking at a full rebuild,even the oil pump will be stuffed ,bore , pistons rings even bent valves .

[skidmark]

I thought it was due to the 34 and SII GTST (33)'s having a ceramic wheel whereas the 32 and S1 33 have steel wheels?

I wish r32's had steel wheel turbos

they are all ceramic mate

[Cubes]

The R32 and R33 SI have ceramic exhaust wheels and a standard metal compressor wheel.

The R33 SII and R34's have ceramic exhaust wheels and a plastic type compressor wheel.

If anything where to hit that plastic compressor wheel when spinning hard it would shatter sending bits through your motor. I've heard of one R33 SII compressor wheel sending bits through the motor but am unsure if this is due to overboosting or a crap in the intake.

Has any 1 here had a plastic compressor let go? I don't think its very common for them to. Some times your lucky some times your not

[cul202]

I read a lot of threads before buying a SII turbo specifically for its plastic compressor wheel for my 32.

All the reports I read said that, like the earlier turbos, the ceramic exhaust wheel is the weakest link in overboosting due to the heat involved. People have said 11 or 12 psi on the street seems to be no probs but a few to many laps on a track at this level would probably mean picking the turbine out of the cat.

Yet to wind mine up yet so I guess I'll find out....

[adznight]

I had my car tuned 2 weeks ago and the boost taken up to 10psi. I was told that was about the max to be safe.

[rob77]

I ran 12psi (high boost) and 10psi (low boost) for a year on my r33 without any problems.