Stan

Hey guys, i'm boosted again, finally!! Tonight I heard my dsm bov for the first time at 4psi (wasn't pushing the car hard because i still have the 240's in it. Anyways, I have my dsm bov on a pipe about 3" off the charge pipe and it doesn't sound very loud... Does the length of the pipe that the bov is sitting on have an effect on sound?

Stan

Carnesd

when I can't hear my bov I open the passenger side window and the sunroof. I wouldn't think it matters though.

robs99si

yeah, if it's closer it's gonna receive openning presure faster which will give it more time to release pressure before you hit the gas again. also if it's closer, there's less space to use up pressure before the BOV opens. T it off the PCV valve with a 5/15" platic T. istead of the smaller Ts' when I did this to mine it was way loud. i got a RFL.

R-MAK

Stan, i think its supposed to be mounted 12 inches away from the throttle body.

Stan

No, no, i'm talking about the height off the charge pipe.

B16MIKE

at low boost it wont be loud at all.

djfob

This is why I swapped mine out for a type s. At about 6 psi my dsm sounded like someone letting air out of my bike tire. I'm a bov ----- and wanted something louder. :P

Cray91

So you are saying that your BOV flange is raised off of the pipe??

I don't think that you could possibly make the flange/pipe long enough to affect the way the air leaves through it. The DSM BOV's just don't have the same sound that others do. If it isn't failing to work mechanically, then forget about it. If you can't forget about it, then you are a sound -----, might be time for a louder BOV.