"The BIG BOV thread" (Where all bov question threads get merged)

[dailydriver]

Most BOV's are the same. So what you have will be fine with your setup. HKS makes slightly different types that have 2 champers know as pull types. these valves dont leak. most all other BOV's will leak after a few years of use.

[Hipswnger2]

So back on topic...

I guess the word is that 100% atm on the GFB is not really a good thing? It is loud, but causes problems?

[Jmd777]

hmm this might change my mind from getting the TXS one since people have had problems with it. Nice touch at the end

[Verdugo]

Sounds good...is this the 100% atmospheric version, or am I on crack in thinking that they make a 50/50 one?

[Cuda]

Well, try it at 100% atm. and see what you think. If you don't like it change it back. That's the cool thing about the GFB, you can go both ways. I know a few people running full atm. bov and they absolutely love them and the way they run. The WRX just wasn't made to run a full atm. bov unless modified. I won't hurt the car but will slow it down a bit.

[jungdragon]

Originally posted by Verdugo
Sounds good...is this the 100% atmospheric version, or am I on crack in thinking that they make a 50/50 one?

yeah I'm using the 100%atm version, they also do make a recirculating one as well

[Oneliner]

I bought one used, and run it 50/50. No problems, I wasn't looking for huge sound effects though, sounds just right. Cars runs great too.

[cann]

loudest are RFLs and Blitz 1st gen

[BoostedBoxer]

removing the intercooler is more work, but makes it alot easier.

[FilMaNutts]

thanks for the help....i didnt take the intercooler out cause i didnt find the need to...it was pretty easy...i love the sound of the hks bov....its killer...and i havent even gotten by exhaust yet...cant wait!!!

[vaindrumr]

A friend of mine was wondering what causes a little bit of oil residue on the blow off valve. Is it something he needs to be concerned about? I didn't know the answer for sure so I decided to ask everyone else?
Thanks

[PKer]

It is normal. Blowby gasses from the crankcase are vented back into the intake stream the gasses contain oil residue that can build up leaving some gunk. Just clean it up or get a catch can to stop it from happening.

[nyxjf]

I have a universal HKS BOV lying around in my house.

does anyone know where to buy a flange for WRX?

[§tï]

I'm currently stock waiting for the warranty to end, so this gives me time to think about what I want to do, Iv'e read in a few threads that Bov decreases the engine performance when the turbo is stock, why is that ? My understanding was that the bOV opened to let air into the turbo when you're not on the throttle to keep the turbo spooling.

While we're on the subject what's a everyday turbo , that I don't have to worry about detonating my motor with? Responses greatly appreciated.

- thanks

[Supasizefries]

Some cars behave oddly with an aftermarket BOV, others seem to run fine. Most people will say you don't need to get one unless you go above 17-18 psi.