RIPP Supercharger JEEP Wrangler 3.8
Blow Off Valve Adjustment: The Blow Off Valve (BOV) is set to a neutral setting from the factory, its primary function is to bleed excess boost into the atmosphere to avoid compressor surge or (dead heading) the supercharger. Its secondary function is making throttle roll-off smoother, as you accelerate through the RPM band and boost curve you naturally roll off the throttle. By doing this you create vacuum which in turn opens the BOV and bleeds the boost away. Too soft a setting will give you a jumpy or rubber-bandy type of acceleration to hard a setting can jeopardize the blower. We recommend starting with a mid way setting, whereas four to five threads of the adjustment screw are showing. To adjust the BOV you will need a 12mm wrench and a 6mm Allen wrench. Using the 12mm open end wrench unlock the locking nut by turning it counter clock wise, once loose spin it a few threads up to make room for adjustment. Using the 6mm Allen wrench bring it in or out according to your adjustments and needs.
Note, in higher elevation it may be necessary to start with a higher setting to begin with to help keep more boost charged up, never run a fully closed valve always leave a minimum of 2-3 threads showing. It’s important that during cruising speeds the BOV is venting to atmosphere, if you do not hear a sure of constant air bleeding off at highway speeds then your BOV is too tight and you risk Dead Heading the blower.
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