safe boost with stock turbos on R32 GTR?

[mitch32]

lol

Like cschepp said run them at like 14psi when they blow upgrage, even 16psi. You won't damage your engine, just cough up an exhaust wheel in the exhast. You can also buy stock gtr turbos for like 200-400$ so if it blows you can even get some stock ones again.

[MarusGTR]

May I also suggest that people who want to up the boost to check compression beforehand so that they dont get mad blowby? And also the obvious: run good plugs, coils and service the fuel pump (filter or unit).

Finally, it's not all fine and dandy to boost up; there's also a danger of damage to the turbine shaft causing shrapnel to form on the compressor side...

[Marke]

...and that his exhaust coughed up the wheel the next day.

I have seen pictures of this. Guy here had to fish the turbine out of his CAT.

Go a head and blow those t28's!! If shards of ceramic and metal end up in your engine and finish it off, just rebuild it. No problem.

[Skym]

Can run up to 1 bar (14.5psi) for everyday use. Some turbo rebuilders seem to recommend no more than 14psi with ceramic exhaust wheel.

One thing I found with stock turbo, lack of engine oilcooler is a problem. It's shaft speed mixed with off balance turbo (age, worn bearings due to lack of oil, because oil coked in CHRA and blocked oil passages to bearings) that can lead to failure. I had this when stock turbo failed on my car, but on compressor side, exhaust side was intact (safe ECU tune). High oil temps, coking was the cause.

Also high exhaust temps (due to ECU tune) doesn't help, as glue holds on ceramic exhaust wheel to shaft and can break down with high exhaust temps. That's why they are replaced for turbo's with steel exhaust wheels, as can take higher exhaust temps. Most stick to 11.6:1 A/F ratio and run conservative ignition timing.

Another is launch control that can make ceramic exhaust wheel fail.

[Elmomafia]

over boosting which will cause failure is not a good idea trust me my turbos went and ****** up my engine stuck with a full engine swap or rebuild....

[TrevoR32]

i boosted over 24lbs on stockies by accident once when my boost first spiked, it was only for a few seconds but an interesting noise none the less hahaha

[A18]

I've been DDing my gts-t with stock turbos at 11-12psi for the past few years and I've never had a problem. When you remove the restrictors boost goes up to about 10psi I believe, so I'd say safe boost for a good condition stock GTR turbo is prob no higher than 13psi. You can run higher, but you start to lose reliabality afterwards.