Stock Rb25det Bov Limits

[QRI05E]

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

[R31Nismoid]

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

[QRI05E]

Thanks Nismoid..

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

Cheers

[N I B]

Ive run over 20PSI without trouble and im sure they will go higher,Dont forget they have boost pressure and spring pressure keeping them shut and only boost pressure trying to open them.

[R31Nismoid]

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

[psi]

i wouldn't get to deep in thought about it. I had to put my std BOV back on to keep the local cop happy! it works fine with 14psi from a GT3040, so ur hiflow booster shouldn't upset it!

[R31Nismoid]

The GTR BOV looks pretty similar to the Stock one...

And as long as the BOV is a re-circ. It does not legally matter what brand/sort it is

[QRI05E]

Thanks for that guys! ill try and source a GTR BOV if not we'll see how it goes with the good old stocker!

Cheers

[dead32]

nizmoid ive seen ppl get defected for a aftermarket recirc bov, wata joke! what ur saying is correct however.

[aDrew_C]

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.

[CEF11E]

my standard rb25 BOV holds 19psi with no problems.

[QRI05E]

Well im gonna see how he stocker holds out on the dyno... worst case ill get a GTR BOV

[Robo's]

How do you know if your stock BOV is leaking?

[QRI05E]

Cause you get massive boost creep... drops off big time