I had been driving around on my P1SC for over 80,000 miles and the single BOV was getting to be a squeaky, noisy irritant. So I purchased a nice BOV from EBay and installed it in parallel to the single one from ATI.

Now when I run up to 3000-4000 RPM or let off the gas, the wha-wha-wha sound is a lot less. ATI should have made a bigger BOV for this product.

 

Yes I use two (2) of these. (App.. 97 383 D1 14psi) I fabed a manifold after the IC ouput to divert air flow re_circ to the blower intake duct. But, the spring was not sized for the bypass pressure for my app. So, I ran some numbers and re_designed the spring size inside the valve. Works very good now. I like the small size and 90 degree design allows for good plumbing. HTH. B.

 

[QUOTE=Ultra_Dog;6164818]I had been driving around on my P1SC for over 80,000 miles and the single BOV was getting to be a squeaky, noisy irritant. QUOTE]

HOLY Crap, 80K on a Blower Set-up, I hope mine last half that long!!

 

They do. They just aren't cheap.