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Stock Rb25det Bov Limits

QRI05E

By QRI05E,
in Engines & Forced Induction

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QRI05E Mentor

QRI05E

Posted
Posted

Hey guys, I been searching all day on the limits of the stock BOV and can’t seem to find what I need. As I will be getting a high flow turbo soon, I am guessing the stock BOV won’t cope with boost levels above 14 psi? From my understanding the BOV sees boost pressure at the throttle body end (bottom part) as well as the manifold (top part) doesn’t this mean the valve should be neutralized? How come many performance shops state the stock BOV opens up under high boost?

My options so far:

- No BOV (though this will reduce the life of the turbo)

- GTR BOV (cant find any)

- Aftermarket Plumb back BOV

Will blocking the vent hole underneath the stock BOV help in higher boost applications?

Any advise will be much appreciated!

Regards,

Sarkis

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R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Just grab a GTR BOV... there are always some popping up in the FS section.

Or ring around workshops, for some reason people love to change them so places often have a couple lying around.

Also start a WTB thread, thats how i got mine... took 1 day :wave:

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Thanks Nismoid..

Any idea to what boost level the GTR BOV can handle??

Cheers

I ran 24psi through a single GTR BOV (didnt use the second one)

And cars like Leewah's GTR has run over 35psi through the pair

aDrew_C Enthusiast

aDrew_C

Posted
Posted

Just having replaced my Rb25 standard BOV that was faulty with a GTR one I couldn't be happier. Haven't plumbed it back yet, but being bigger its actually quieter (not plumbed back yet), but then again my old one was only opening a little after it got bashed in. Anyhow, they're very strong and standard looking, I'd take one over some stupid after market one any day.

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