nzcars33

Hello, I have a procharger psc1 supercharger and it came with the small bosch bov, I had a Tial Q 50mm flange weld on my pipe just after the blower and installed the bov with the 2psi supercharger spring and when I get on it it seems like the bov is slow to close and my car always sounds like a large vacuum cleaner, I thought when I rev it up the valve should close and then release when I let off, my question is would a stiffer spring make the bov close faster. Thank you.

MVP'S ZO6

They all do that. Make sure it's clean and leave the 2 psi spring in there. I've been told my car sounds like a zamboni.

Mike04

Tial Q is a loud BOV. Look at your vacuum/ boost gauge when you rev it, BOV doesn't close unless you are below the 2 psi spring. Revving it you're most likely not going to hear much of it closing.

Spring you have is fine.

nzcars33

Thank you all.

idontknow

i am getting ready to order one. i think it is more quiet than the big red race valve

PEETYZ

I love my tial q on my P1SC1. It is quieter than the Procharger race valve but it sounds great!

OP do you live in Kettering? You are just down street from me.

nzcars33

Yes I live near Dorthy ln market off Far Hills.

PEETYZ

Pm sent

Milan

My big red is much quieter than my tial BOV was

StealthFRC

tial is crazy loud, almost annoying thus why i installed a second one. its still ridiculous but i can tolerate it now.
ive driven past people with there windows open and they quickly plug there ears lol

PEETYZ

I take it that it will really depend on the blower? My friend's D1 and now F1 set up on his GTO with Big Red was always quite a bit louder than the Tial Q on my P1 both 10psi.

Heres an old clip of his with D1 and Big Red. Crazy loud

Milan

I ran the Tial on my T-trim and then the Ysi which I still have and it didn't make a difference. Then I switched to the big red and it's a lot quieter. You can still hear it but it's less annoying IMO

PEETYZ

Gotcha. Do you have the open or closed unit with big red? That also makes a difference right? His is open.

http://www.procharger.com/store/inde...ewCat&catId=14

Milan

I have the open version

idontknow

can we get a video cause of the big red on your cars cause now you all are starting to make me rethink and get the red. i have heard a red on a mustang and it was loud as sh*t and annoying.

95wht6spd

Mine closes right away and gets quiet, with anything more than just light throttle. When I had a boost leak, it sounded like what you describe. I thought the BOV was not closing, but it was a leak in tubing.

Blow Torch

I asked this same question when I installed my Trial in place of the stock small BOV. It is almost annoying at part throttle, so I figured people would think I had a HUGE air leak. You get used to it, and when it "pops off" when you lift the throttle, EVERYBODY looks up.

PEETYZ

Vids of my car with Tial Q if interested:

https://www.youtube.com/user/PHZGTO1...ew=0&flow=grid