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Max Psi For Rb25 Turbo

r33 chris

By r33 chris,
in South Australia

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bokee Collaborator

bokee

Posted
Posted

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

Krishy Grand Master

Krishy

Posted
Posted

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 Enthusiast

morbsy

Posted
Posted

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 Grand Master

Nightcrawler

Posted
Posted

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.

Krishy Grand Master

Krishy

Posted
Posted
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

Cubes Grand Master

Cubes

Posted
Posted
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.

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