I hope I am wrong but I dont see how i am ... I has my BOV installed and just started it up to test it ... well when i get on it or its idiling I feel air shooting outta the k&N filter element ..that is boost!! everytime i mash it a lil air shoots outta the element ... I thought the air was suppose to shoot out when i GET OFF of the thorttle??????? Is there a diaphram inside this thing that is broke or stuck open?????????????????

That is normal. Actually, the valve is open most of the time. It's hard to explain. Easier to show. Don't worry, it's functioning properly.

Just an FYI - I'm not our tech rep. He doesn't monitor our forums.

If and when you have a technical question regarding any of our products please contact our tech rep directly at 954-247-0705 or by e-mail at tech_support@rivamotorsports.com. And, when you do post a tech question for us to the forums but get an answer by phone or e-mail before I reply please be sure to post what you gleaned so others can benefit from the knowledge. Thanks!

OK .. Sorry ,, THANK YOU

Does that take away from the boost?

No!

It's not a blow-off valve, it's a by-pass valve. It opens when there is vaccum in the air box. Like when the throttle is either closed or not allowing enough boost into the air box to trigger closing of the by-pass valve.

It saves the supercharger clutch by allowing the excess air pressure between the supercharger and a closed throttle body to escape instead of causing the supercharger impeller to slow down faster than the engine rpm, which causes the clutch to slip.

A blow-off or pop-off valve is used mainly on turbocharged engines to release excess pressure as a turbocharger is not mechanically tied to engine rpm, like a supercharger, and will continue to produce very high boost levels after getting off the gas as there is really nothing to slow it down quickly. A pop-off or blow-off valve releases based upon excess pressure in between the turbocharger and the throttle body, not vaccum in the air box like a by-pass valve.

That's why you feel air coming out of the filter when the motor is at idle and when you give it a little gas. Give it a lot of gas and you will feel the air coming out of the by- pass suddenly stop.