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Removing Boost Restrictor

kikutaknight

By kikutaknight,
in Western Australia

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kikutaknight Enthusiast

kikutaknight

Posted
Posted

On the cruise last night, Allen (aka 2LV8ETR) removed the restrictor from Scott's (aka reaper83) car for teh extra boost. 

I believe scott's is a rb26? is that dett? stock turbo? Afterwards he was saying how his stock pressure gauge was hitting max (+7mmHg). I believe +7 is equal to around 14.5 psi, right?

I'm interested in getting more boost out of my car also...but on the rb25det, stock turbo blows up if you push it much more than 12psi, right? what would removing the restrictor in my car do? is it safe?

also...i've ordered a turbotech manual boost controller which i'll be installing once it arrives. also want to know if i'll gain by having the boost controller and the restrictor out.

ty, ty.

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https://www.sau.com.au/forums/topic/291921-removing-boost-restrictor/
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SKYRYAN Grand Master

SKYRYAN

Posted
Posted (edited)

I don't think you have a restrictor in the 25

And the boost could be a lot more than that. Don't use factory boost guage when you up the boost. Buy an aftermarket one or use the reading on your electronic boost controllers.

Edited by SKYRYAN
2LV8ETR Mentor

2LV8ETR

Posted
Posted

Only the RB26DETT has the restrictor in it near the PCM, RB25DET's don't.

As far as the RB25DET's are concerned, I wouldn't push one past 12psi safely.

In saying that, V8EATER was caning his RB20DET around pushing 18psi before we dropped the RB26DETT in, but it would only have been a matter of time before the turbo failed.

payback21 Community Regular

payback21

Posted
Posted
Only the RB26DETT has the restrictor in it near the PCM, RB25DET's don't.

As far as the RB25DET's are concerned, I wouldn't push one past 12psi safely.

In saying that, V8EATER was caning his RB20DET around pushing 18psi before we dropped the RB26DETT in, but it would only have been a matter of time before the turbo failed.

I personally think that it would of failed ages ago if i didnt have a electronic boost controller hooked up to it. Electronic boost controllers make a huge difference to the way the turbo spools, spikes etc

We will see how long it lasts when i finish my 4wd beach buggy with the old 20.

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