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Stock Blow off valve??
Posted: Fri Aug 26, 2005 12:46 am
by simbey1982
I was wondering, do the tlegs come with a blow off valve stock?
Im having a bunch of trouble with the one on my WRX intercooler and had to just fab a plate to put over the hole....i know this can damage the turbo after prolonged use because it can spin it backwards....
So is this ok to leave for a while or do i need to fix this ASAP
Posted: Fri Aug 26, 2005 1:04 am
by 91White-T
Some will tell you yes, but I ran without a bypass for years on my old car and had no problems(at 200K+ and 15psi)
Posted: Tue Sep 06, 2005 4:03 am
by napphappy
and yes the Turbo Legacys did have a "air bypass valve"
It is a different style than the usdm WRX
Posted: Mon Sep 12, 2005 2:05 am
by crappyrice
whats a air bypass vavle? is it same aas the recirculation vlave?
Posted: Tue Sep 20, 2005 7:58 am
by 555BCTurbo
yessir
Posted: Tue Sep 20, 2005 4:17 pm
by crappyrice
so ow hard is it to switch the recirculation valve with a blow off one, any advantages or dis advantages, and about how much in usd will it cost.
Posted: Tue Sep 20, 2005 6:39 pm
by LaureltheQueen
lose power.
sound cool
depends on the valve
Posted: Tue Sep 20, 2005 7:19 pm
by crappyrice
how do i loose power, like isnt the blow off vlave just getting rid of excess air so i deont gett too much boost?
Posted: Tue Sep 20, 2005 7:53 pm
by LaureltheQueen
the recirc valve(that's stock)puts that air back into your intake system. Your ecu is tuned to run with a recirculationg BOV, thus the loss of power. just go to
www.iwsti.com and do a search for "new bov" or something along those lines
Posted: Thu Sep 22, 2005 6:56 pm
by Matt Monson
Go Fast Bits makes a combination BOV specifically for the WRX. It reciculates enough air for the MAF and ECU to function properly, and then vents the rest to atmosphere. You can buy them most anywhere that stocks WRX speed parts...
Posted: Fri Sep 23, 2005 1:23 pm
by irishsetter
The turbo also will spool down quicker and make it have a longer spool up time.
Posted: Fri Sep 23, 2005 5:49 pm
by 91White-T
crappyrice wrote: like isnt the blow off vlave just getting rid of excess air so i deont gett too much boost?
Thats an external wastegate.
Posted: Fri Sep 23, 2005 6:28 pm
by crappyrice
whats the diff between the wastegate and the bov. like whats the purpose of the wastegate,
Posted: Fri Sep 23, 2005 6:48 pm
by 91White-T
Wastegate is like a bov but for the exhaust side. For example, an external gate is attached to the exahust manifold and will open to release some exhaust before it gets to the turbine in order to maintain boost at a certain level. An internal gate is in the turbine housing(its a little flap) and will open and allow exhaust to bypass the turbine, again to keep the boost at a certain level.