bov or no bov
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Joined: Apr 2004
Posts: 81
From: Sacramento
bov or no bov
im having a vf34 setup soon.. and i was wondering if my stock recirculation valve can handle all of the boost pressure... if my stock one can handle it i wont buy and aftermarket bov.. but if i do need to.. what kind of aftermarket bov should i get??
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From: Yokohama, Japan
Car Info: Ver IV STi Wagon
What else are you having done?
I have VF-34, STi pink injectors, Fuel pump, Reflashed Rom, and still run stock BOV and intercooler.
Next and last upgrade would be STI intercooler, but the BOV isn't something that you'll need.
I have VF-34, STi pink injectors, Fuel pump, Reflashed Rom, and still run stock BOV and intercooler.
Next and last upgrade would be STI intercooler, but the BOV isn't something that you'll need.
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From: Sunnyvale, CA
Car Info: '13 BRZ Limited / '02 WRX
I think the stock BPV can hold up to 21-21 PSI actually, my peak PSI (thanks to my defi boost gauge 
) is something like 18.3 and I didnt hear/feel any kind of leaking
) is something like 18.3 and I didnt hear/feel any kind of leaking
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Joined: Oct 2003
Posts: 297
From: Evansville, IN
Car Info: 2003 Subaru WRX Aspen White
Originally Posted by MBasile
I didnt hear/feel any kind of leaking
how you tell when the stocker fails is when boost is on target but MAF voltage does not go up as boost increases...my stock bpv failed at ~19psi...previously tuned at ~18psi w/o issues but once tuned above that, the MAF voltage would not go up....crushed the cap to get thru tuning, then replaced it with a APS BPV...no problems since..
Thread Starter
Registered User
Joined: Apr 2004
Posts: 81
From: Sacramento
i have uppipe..turbo back.. sti intercooler.. and going to have sti pink vf34 and fuel pump installed.. and i heard the stock bov can hold up safely up to 19 psi without any leaks.. but should i get a aftermarket bov or recirculation valve??
Originally Posted by testes1010
mine 'leaked' (moreso blewby) on the dyno during tuning....
how you tell when the stocker fails is when boost is on target but MAF voltage does not go up as boost increases...my stock bpv failed at ~19psi...previously tuned at ~18psi w/o issues but once tuned above that, the MAF voltage would not go up....crushed the cap to get thru tuning, then replaced it with a APS BPV...no problems since..
how you tell when the stocker fails is when boost is on target but MAF voltage does not go up as boost increases...my stock bpv failed at ~19psi...previously tuned at ~18psi w/o issues but once tuned above that, the MAF voltage would not go up....crushed the cap to get thru tuning, then replaced it with a APS BPV...no problems since..
dont let the post count fool you
did you do any thing to the short block ?
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Joined: Oct 2003
Posts: 297
From: Evansville, IN
Car Info: 2003 Subaru WRX Aspen White
Originally Posted by sigma pi
wow good info
dont let the post count fool you
did you do any thing to the short block ?
dont let the post count fool you
did you do any thing to the short block ?
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From: Sunnyvale, CA
Car Info: '13 BRZ Limited / '02 WRX
Originally Posted by BbOyPinOy
i have uppipe..turbo back.. sti intercooler.. and going to have sti pink vf34 and fuel pump installed.. and i heard the stock bov can hold up safely up to 19 psi without any leaks.. but should i get a aftermarket bov or recirculation valve??
Thread Starter
Registered User
Joined: Apr 2004
Posts: 81
From: Sacramento
yeah i really dont care about the bov sound.. but would you happen to know any good recirculation valves?? i heard greddy made a bov that has some hardware the can make it to 100% recirculation!!
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