legacycentral bbs

Has anyone been able to use a stock WRX BPV on a WRX intercooler? Is it an option with the cruise control cable connection located where it is or will it interfere?

I did use one for a while. Two things, It wont pass with the cruise control cable in place, mine was removred anyway. And you won't be able to route the exhausted air back in the intake, the outlet is straight on the throttle body. SO you have to remove the elbow on the BPV and instal a flapper of some sort that will act as a check valve. I screwed on a piece of silicone hose used on aircraft, wich would flap open and let air out then seal back when under vacuum.

Cuz the BPV will sometime open under vacuum, and you don't want to run lean. With the flapper it worked just like a Blow off valve. But a really loud one! and you'll run rich as hell, backfire a'plenty.

So, basically a "No"

First option is to blow off to atmosphere several different ways, and that generally doesn't run so hot (either by doing what mhrally did, or by getting a real blow off valve). And, it seems like most people have to remove the cruise control.

If you want to recirculate, you can use some AFTERMARKET recirculating valves made for WRX's. My turboXS doesn't interfere with anything, it recirculates properly to the intake track, and I didn't even have to remove cruise control. We DID have to custom rig the tubing from the valve to the intake track, but you're looking at doing that no matter what option you choose.



Or, you can use your stock recirculating valve - but it won't mount on the IC. So, you'd have to put a flange and elbow coming off the IC. You can custom make the flange like Vikash did for me (in the picture below) or you can buy a flange and elbow from turboXS.

Blast it is as i feared. This is how i have my current setup.

The piping for the return isnt a problem its just clearing that damn cruise cable. Is there any real difference between a WRX BPV and the T leggy one besides being able to hold a bit more pressure? Do they both partially open at idle? I just feel mine is staying open untill like 5psi+ and ive tried a known good valve too. I get the darth woosh sound constantly untill ive built that 5psi and it will surge slightly and clear up and sound normal when i let off throttle. I know its not the wastegate cause ive got a bellmouth and that thing is much louder.

Also any reason to move to an aftermarket option besides the noise novelty of a partial atmospheric?

GotSubie PM'd me and asked how these were made.

Here's my intercooler install thread:
http://bbs.legacycentral.org/viewtopic.php?t=23016



This is my first setup using the stock recirc valve. Vikash did most of this. The only thing we fabricated was the flange on the IC. All the parts from the flange were picked up from the local hardware store - real ghetto garage. The thin plate material came from an electrical conduit box, which Vikash cut to shape with a cutoff wheel I think. The copper elbow came from the pumbing department of the hardware store. The diameter of the copper elbow should be very close to the diameter of the blow off valve, so that the same hose will fit well over both. He soldered them together with a blow torch. Ideally, you would also solder a bead around the open end of copper tube to help the rubber hose stay on it, but we didn't. To seal against the IC, I think we just used silicone gasket maker, although you could also pick up a stock gasket for a WRX from a Subaru dealer parts dept. I'm not sure where we got the tubing to hook it all up. Some of it was probably cannibalized from the stock setup, other tubing was probably just generic coolant line from our local auto store. Where the hose goes into the intake track, there's a plastic "Emissions elbow" which we picked up from the local autoparts store.




This was my second setup with an aftermarket BOV. All the parts are basically turboXS, but most of the work was done by Andrewtech.
At the top of this page is the flange and lower down is the 90 degree elbow. http://www.turboxs.com/shop_prod.php?what_category=5
At the bottom of this page is their recirc valves: http://www.turboxs.com/shop_prod.php?what_category=2
If you buy a valve from them, they might include the flange or elbow as part of the kit, I don't remember. Once again, the sillicone tubing is from a variety of sources. Some are cannibalized stock tubes, some are generic coolant hoses from autozone, and the red one came from an aftermarket set of intercooler hoses for a WRX. Where the hose enters the intake track, we used a plastic "Emission elbow" from the local auto store. One of the challenges with the hose is reducing diameter from the large OD of the recirc valve to the small OD of the elbow on the intake track.