This is a discussion on "The BIG BOV thread" (Where all bov question threads get merged) within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Originally Posted by Mikie13 It will. Or even more so with an SRI or just a snorkus delete to the ...
A friend of mines gave me his NGR blow off valve off his AE86 and i was wondering since my sti has a wastegate would it be smart to put a blow off valve on it.
Your Sti already has one one it. Is your Sti basically stock? If so, Stick with OEM its more reliable. Just my 2cents.
Last edited by irvin787878; 01-01-2012 at 12:21 PM.
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Aftermarket blow off valves cause problems. The stock one that came with the car is the best (unless you're running a huge turbo with a built engine).
hey im moving to ft hood texas im not sure if your familiar with the area but are there any good shops out there because i am looking to rebuild the engine
Most of the Ft. Hood crew take their cars to AWDTuning in Flower Mound.. there's actually quite a few guys down there with some pretty expensive built Subies.
I guess it depends on the year model. Mine never leaked. The pressure differential between the the two sides of the BPV keeps the valve closed. I even remember seeing a test someone did with the Forge BPV where they removed the spring entirely, and the diaphragm stayed closed at 20psi because of the pressure differential. Leaking is very common with aftermarket BOVs though. Most will leak even at idle.
That's pretty much it. Although there are probably some poorly designed recirc valves that have problems. When most people talk about buying a BOV they're talking about atmospheric types, which we all know are prone to leaking, not to mention the fact that they dump air that has already been metered by the MAF, causing the car to run extremely rich for brief moments.
I never had a problem with my stock BPV.. when I bought my second WRX it came with a TurboSmart atmospheric BOV, which leaked. I traded that for a HKS SSQV atmospheric BOV, which also leaked. Now that I'm running a Forge Recirculating Race type BOV I have no problems, even at 25psi.
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my friend gave me a turbo xs bov that was 5050 like atmospherical and recirculating, i had it on for about a day and theres no need unless u want the sound or have a built engine. i put an intake on and took the bov off and it still sneezes as loud with just the intake. save it for when u have a built engine
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