just installed a vortech on my 99 si. when ever im cruising, keeping speed, its just blowing off...rediculously loud..we have tightened it, loosened it...yet still the same problem, i knew it would be pushing air...but not like this, its like the loudest whistle ive ever herd...anyone else have the kit and know how to fix this?!? it cant be normal!

 

vortechBOV is always pushing out air....i would say try adjusting the pressure or check in the BOV maybe the valve got stuck on the rubber sealer?????

 

I put a softer spring in mine to keep it from surging. It never whistled but im sure that would fix it for you.

 

a softer spring!!!! we can push it in w/ one finger, not even that hard...i think the valve is bad, i did buy it used..but low miles, but god knows how the person before me used it. we hooked up a greddy BOV and it worked fine...so maybe. but i herd the vortech is suppose to do that, but why the hell is it whisling SOOOO loud! ive herd vortech's b4, its nothing like this..lol

 

huh, the spring that came in mine was really stiff (from a revhard kit) very hard to push in with your thumb. The one i put in feels about the same as a Turbo XS one. try a stiffer spring then. as long as it blows off clean with little to no surge run it.

 

but those are BOV's that are designed for a turbo...do you think the vortech is any different?!?

 

the vortech supercharger itself whistles... and the supercharger will almost always be making boost, since it is driven by the motor and not by load.
thats why...

 

yah, well then i need to get a blow off valve that dosent WHISTLE like a train! it has to be broken, there is no way people drive aroudn with this

 

its not broken... thats how it sounds, you just dont like it, lol

 

i loosened the **** out of it...sounds much better, no more whistling i guess we just had it too tight, and instead of WOOOSHING, it was whistling