I was in the market for an aftermarket BOV for my turbonetics S/t kit. why? cuz my raptor made turkey calls (flutter) everytime i shifted. Dont know why, but it did, even at full boost..well, i called turbonetics and they said the screw was on too tight. ( i didnt install it) i was told to turn the screw on top counter-clockwise. i did and man...talk about a BOV! IM the one to complain and ***** alot, but when at full, i can actually hear a PPPSSSHHH! not a flutter that sounds like something ive only heard on huntin' channels. well anyways, it turns out that the raptor BOV does sound good, and if anyone is haveing the same problem, try that...i know we got tons of peeps having the same noice.....

thanks for reading my pointless, but very informative thread...


-daniel

 

Yeah, I've said this in past threads and so have others.

The Raptor is a great BoV. If it flutters or whistles, it is installed incorrectly.

 

kcobean needs to give this a try, i got a ride in his car this past weekend and i think what you are describing is exactly what his was doing

 

hope it helps bean....i know him and I had similar problems...

 

I have my screw turned so far out that it's only in about 3 threads. Point is it clearly doesn't contact the spring in the BOV, so I am effectively adjusted all the way out and mine still sounds turkey call-ish. I like the BOV, but if flutter indicates improper operation, mine is FUBAR.

 

i have about 6 threads on mine coming out of the screw, did you do it counter-clockwise? i counted...

 

Do you mean that you have 6 threads showing? I guess it would depend if the same adjustment screw, lock-nut was used, etc.

I talked to someone recently that said a BOV being too loose could cause fluttering. Everyone else says too tight causes it. At this point, I'm going to take the car out and drive it with some tools and make adjustments to see if I can get it working right. People always look at me funny when I come off the gas like "Dude, nice looking car, but what the hell is wrong with it????"

 

you want turkey call? go here https://my350z.com/forum/showthread....&highlight=bov

 

ya i thought about this vid right when i saw the title to this post, hahaha. gave me all sorts of ideas, like a trumpet or something, lol.
mine flutters a little but mostly just at the very tail end at low rpms. when just normal driving and shifting , no flutter just ppphhhssss!

 

Well I wouldn't say that it would be installed "incorrectly" since they just bolt it on without making any adjustments to the screw on top of the BOV...

At first it just made a huge PSSHHH, so I tickered with it by turning it counter clockwise a couple of turns... Now I have the somewhat turkey call flutter

Other's who have driven my car liked it alot better that way and so do I