Quote:
Originally Posted by nlowell
ok, so I think I have an issue with my Bypass Valve. When I am partial throttle at around 5k RPM I get a very loud hissing noise that continues to get louder until I either shift or go WOT. I did some testing tonight and it appears my bypass is staying open under partial throttle situations when my boost gauge is registering anywhere from -12 to +2 or +3. The higher the RPM, the more positive boost it takes to close the bypass. While in theory, this makes sense, from what I have read it means that I need a stronger spring on my bypass valve to keep it closed under those situations. As I understand it, the bypass should only open when I am not on the throttle at all.
Can someone help me out here? Anyone else with this situation? Is the spring even upgradable or do I need a new bypass?
Here is a partial throttle video where you can hear the hissing of the bypass:
https://vimeo.com/113887755 |
Mine had the same hiss actually. We initially thought it was a boost leak but narrowed it down to the bypass valve. I'm winding if upgrading to the metal housing unit would solve that