Max Psi For Rb25 Turbo

[r33 chris]

hey guys just wondering

how many psi can a stock rb 25 turbo run safely?

[bokee]

if you want to be sure that your turbo is going to be safe then run 12 if you go above this its not the best thing for the ceramic exhaust wheel as it can finish in your exhaust but i know guys that run 14 and still havent had any probs, i am making 204rwkw at 12 psi and use EBC as it is a much safer way of controling your boost

[r33 chris]

yeh im running 14 psi normally but recently been spiking to 16

sum people where saying its fine and sum saying 12 so i wasnt to sure,

ill just turn it down

thanks

[Nightcrawler]

at 16psi the turbo wouldn't last long. The HPI demo R34 had their turbo go at 12psi at a track day. But they are even weaker than R33/R32 turbos, as they have a nylon impeller

[Cubes]

R32 - 14-15psi (only because its a smaller motor)

R33 - 12psi

R34 - 11-12psi

Don't be putting an r32 turbo on the r33 thinking you can push 14-15psi in to it.

[Krishy]

yeah its pretty well covered in some of the threads mate......i personally have been adviced by some of the guru's of imports that on a stock RB25 turbo dont go past 12 psi....12 psi is the safe boost level....anything above that will reduce the life of the turbo big time.....i have mine on 10psi on a r33 s1 and i reakon that is plenty of boost for me.....

[morbsy]

I've only had my R33 for about 4 months now and am new to forced induction. but how do you increase your boost? do you have to run a boost controller or can you just go to a place like boostworx and get them to put it up for you? thanks

[Nightcrawler]

you need a bleed valve or electronic boost controller (a bleed valve is a type of manual boost controller).

Unless you have an accurate boost gauge (the factory one is NOT), and some decent mechanical knowledge (which, no offense sounds like you don't), take it to a workshop and get them put in a device for you and set it up.

[morbsy]

awesome, thanks. Would the cops defect you for having a bleed valve?

[Cubes]

Yes.

[bezender]

i have an rb25 turbo on my rb20. its happy as a pig in shit at 13psi, i get 199 at the wheels with re-mapped ecu

[Krishy]

I've only had my R33 for about 4 months now and am new to forced induction. but how do you increase your boost? do you have to run a boost controller or can you just go to a place like boostworx and get them to put it up for you? thanks

Hey mate....i wont go down the road of a bleeder valve...ebc is the way to go but make sure that its all tuned properly

[r33 chris]

well ive tuned it back to 14 psi but i just when the turbo eventually blows i gives me an excuse 2 upgrade haha

[Cubes]

i have an rb25 turbo on my rb20. its happy as a pig in shit at 13psi, i get 199 at the wheels with re-mapped ecu

The RB20 uses a fair whack less air than the rb25. As a result the shaft speed/backpressure/power/airflow etc is all less for the same given boost pressure.

14psi is fine with the rb25 turbo on the rb20.

The rb20det turbo on both the rb20 and rb30 (with 25 head) made ever so slightly more power with the 25 head but with ~4-5psi less boost.

The bottom end makes no difference to peak power as that is governed by the head.

An RB20DET with 14psi should be making similiar power as to an RB25det with ~10psi according to what I've seen with mine.

[Cubes]

r33chris.

I see your after a new turbo as yours is whining.

Bugger.. If possible stretch to a highflow or a GT BB core so you can run some decent boost and not worry about it failing.

[r33 chris]

thanks 4 the advise cubes

is anyone going on that cruise tomorrow ?

[DSTROY]

^^^^ i might go.