Got me a blowoff...a nice one!

[Red_LX]

Check this out. A few weeks ago my brother won a couple auctions on ebay for some used BOV's...a couple older HKS Super Sounds and an old looking HKS bypass valve. Well, he decided to give me the bypass valve for christmas (how nice of him!), and it is shown below. It looked pretty ratty so I took it apart and cleaned it up. The seal and everything inside is still good, so I decided to make it look good by painting it the same color as my car. I think it came out very well (I'm not sure why it looks so damn dirty in the pic, it just has some dust on it). I know it's a bypass valve but I'm planning on just running it as a blowoff.

Oh yeah, best part is all three blowoff valves cost about $60, and that's including the $25 it cost to ship them from the philippines. So had I paid for this one it woulda cost me about $30

 

[Lx89Stang05]

nice. i like the sound of this HSK

right click save as
click here

 

[Stinger]

Cool deal...I don't think you'll be happy with the way it runs if you use it as a BOV though...

 

[140cilx]

Garrett, the problem you may have with it (I predict) and that Stinger alludes to I think, is that it can/will open after you come off the gas and start generating some vacuum in the intake, so it will start to open, then as you gas it, it stay's open, vacuum continues in the intake, but the turbo starts spooling, the vam opens more and more as the turbo speed increases, the computer begins freaking out richening the mix more and more, but the air is being expelled through the HKS. That's why we use a 2 piston BOV like the Bailey. It takes vacuum on one piston and boost on the other piston to actually make it blow off. Your system will be opening when it should be closed and you'll have a leak.
I used a Bosch and it would do this a lot. Ran fine that way, but it was aggravating at times on the freeway, didn't idle real smooth, and I could even kill the engine sometimes after a full throttle run, then letting off the gas altogether.
You'll have to let us know how it works for you.

 

[Red_LX]

What if I ran it as a bypass, then?

 

[Stinger]

it will be perfect as a bypass

 

[Red_LX]

Even if it leaks?

By the way, when you hook up a bypass valve, is the bypass tube supposed to go in before or after the VAM?

 

[bhuff30]

after. the idea is to not allow air that has already gone throught the VAM out of the system.
Most BOV's don't work with our system because they release air at idle. That is where the twin piston baily comes in.
Still a good score though.

 

[DirtyD916]

how do you run a bov that doesn't blow air back to the VAM? How does the metering work when air is released into the atmosphere after a full throttle left off?

 

[Stinger]

Because it's not enough air to effect the running condition if it's only releasing momentarily (between shifts and such). It's when they STAY open that the problems start.

Stinger

 

[GTPhreak]

what about using a one way check valve on it to use as a blowoff

 

[140cilx]

what about using a one way check valve on it to use as a blowoff

Just didn't seem to work very well. It worked, but you could tell it was requiring the one way valve, and I used it for a year happily like that. But when I put the Bailey Evo on there, it was a big time improvement in smooooooooooooooooth.