APS dual vent BOV question - Subaru WRX Forum
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post #1 of 3 Old 03-07-2009, 07:09 PM Thread Starter
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APS dual vent BOV question

I just installed this BOV today and I honestly cant tell much of a difference in sound if any at all. I am sure this is a newb question and I apologize for it. Ive tried adjusting the top screw and it didnt seem to make a difference. My car is stock with the exception of this piece. Should I notice any difference? Thanks in advance for the help!
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post #2 of 3 Old 03-08-2009, 11:25 PM
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Post #16 is pretty informative.
Aps Dual Vent BOV... - NASIOC

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post #3 of 3 Old 03-09-2009, 01:32 AM
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I have one. Most of the time this valve recirculates unless you are running higher boost which pushes the piston past the VTA port. Adjusting the screw on top adjusts the preload for the valve and has nothing to do with the sound.

Read this page and learn a little bit about the BOV you bought:APS High Volume Twin Vent Blow Off Valve

The only reason to take off the factory BPV is if you are running more than 18 PSI where the stock valve may or may not leak. BOV's make our cars run poorly, but you bought a good one.

My name is Ken and I am a HP Junkie.
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