When should I change my bypass/blow off valve

**tstang** · 08-23-2005, 12:17 AM

Im running a Vortech SQ trim I was wondering when I had to upgrade from the plastic piece they give you the blow off/ bypass valve to a bigger unit? And what are you guys running and any install pics Thanks

***speedytang*** · 08-23-2005, 02:59 AM

The plastic bosch valve seems to do fine till over 15psi. Audi now carries a 2nd version of the Bosch valve that is rated at 22psi. A lot of choices the problem is room for the install with tight hood area on V8s compared to 4 bangers.

**tstang** · 08-23-2005, 07:21 AM

thanks I realize theres not much room thats why i asked for some suggestions along with pictures if any had them available. Ill keep those 2 tips in mind thank you. Any others?

**BLOWNBY** · 08-23-2005, 09:30 AM

The stocker seems good till the 15psi range like prevosly said. Look at the maxflow mini-race bypass. Should be good till low 20's yet is still somewhat compact.

**tstang** · 08-23-2005, 11:26 PM

ok thanks. Just curious why is the Mini rated at 0-8lbs of boost and teh mondo rated at 0-10lbs? Dont make sense to me. I should be a bit under 15 im seeing 10 at 5000rpm and i have another 1500rpm to turn the motor on my shift point. Motor is untuned at the moment so Im not revving it all the way up.

**88 novi** · 09-13-2006, 07:36 PM

Originally Posted by speedytang

The plastic bosch valve seems to do fine till over 15psi. Audi now carries a 2nd version of the Bosch valve that is rated at 22psi. A lot of choices the problem is room for the install with tight hood area on V8s compared to 4 bangers.

i have vw 114 bypass gos to 15psi need looking for the 22psi audi one. novi 88