Highest safe boost for stock r34 turbo.

[lwells]

ed: I think you know what I meant. As I said in my first post, these things depend entirely on the individual turbo too.

Personally I take most anything SK says as gospel

LW.

[Abo Bob]

Yeah seems to be a bit of luck involved. I've hammered 10 pr 12 laps around Wakefield at 1 bar without hurting the turbo (spat a few other things though). Don't have a FMIC either. Other people spit bits of their turbo out at .81 bar. Go figure.

[ed]

damn what pads are you running?

you didn't get brake fade after 10/12 hard laps?

[Abo Bob]

Not at all, never have. Have run 15-20 several times too. I was running Bendix Ultimate pads at that time.

[Guest Robo's]

Ive been running 13psi for about 10 months now an its still going strong.

[skitzedR32]

been running my 32 with exaust pod without touching the turb and it went to 11 psi just from that now its got a bleed valve to set it to 14.7 switchable and she is running nice and hard all day every day.

Then again im just waiting for it to blow so i can get a 2540

[ed]

skitzedR32, are you running a 34 turbo?

slightly different, but coxy was running 11psi daily on his GTT and now one of the seals have let go on the turbo. I think his car was bone stock though!

http://www.skylines-nsw.com/snsw/viewtopic.php?t=20

[GunMetalR33]

R32's dont produce the same heat in the zaust housing. Heat is what kills these turbos, so less heat = more potential boost. So a 32 can in theory run more boost than a 34 or 33 if we are talking ceramic or platic compound compressor wheels.

[Abo Bob]

So is it always the compressor wheel that goes or does the impeller sometimes do it? Have I got my terms right? Compressor wheel on the exhaust side and impeller wheel on the intake side???

Anyone?

[Roy]

Intake side is compressor, exhasut side is turbine or exhaust wheel. It appears the most common to let go is the turbine (exhaust side)

[JayDee]

I am looking to boost my GTR and waant to know is it always the case that all debris from the exhaust wheel goes down the exhaust pipe or is there ANY chance of any bits entering the exhaust ports. I can probably live with the replacement cost of a turbo but don't want to stuff the head/valves etc.

[skygt]

Ive been running 13.5 for the past 12 months, stock ecu,turbo,and intercooler still going ok

except for the cutting out at low revs, thats why its going in for a dyno tomorrow!!!

[ed]

I am looking to boost my GTR and waant to know is it always the case that all debris from the exhaust wheel goes down the exhaust pipe or is there ANY chance of any bits entering the exhaust ports. I can probably live with the replacement cost of a turbo but don't want to stuff the head/valves etc.

i was told if u back off it can go back in the motor ?

anyone know?

[skitzedR32]

ed,

wasnt aware that 32 turbos are a bit more heat resistant. kinda happy about that i must say, though i still want a 2540 on it.

[GunMetalR33]

ed,

wasnt aware that 32 turbos are a bit more heat resistant. kinda happy about that i must say, though i  still want  a 2540 on it.

Its not that 32 turbos are more heat resistant, Its more the fact that the rb20 produces less heat to the turbo than rb25

[ed]

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?

[GunMetalR33]

Its true that a steel wheel will take more heat than the ceramic one. But if you take a RB25 turbo and put it in a RB20 you will be able to run more than 14psi that is possible in its original application.

I did not know that the RD20 turbo had a steel wheel? Why did nissan go to the ceramic one? Maybe for a quicker spool up yime or something...

[ed]

I think that's exactly why they went to a cermaic one.

much lighter so you get a quicker spool up and response even?

[Targa Tom]

The biggest mistake people make with bikes, Karts, and cars is forget the guy who designed the thing had a fair idea.... After all he earns a heap of Yen and would be out of a job otherwise.

Safest boost level is standard... end of story! It allows for fuel variables, worn engine components and is working with its mate the ECU who was born the same day.

Additional boost = additional performance. and the reliability is inversely proportional.

That is why most performance mods are sold as a package... and considering you can hardley notice <20kw, it becomes a game of chance, you decide at what level you wish to play...

Good Luck

[croat]

When your turbo is on its way out does it make any sort of sound? If i boost mine up i get this screeching sound as it spools up (the more boost the louder the sound). Is this an indication that my turbo is rooted?