k-rok

so the car idles by itself now, but the BOV wont blow off. i took off the cover and the mechanism that moves on the inside is VERY tight. it will move if i push on it but its super duper tight.

anything i can do?

Ottoman

how is the vacuume line connected?
how much boost are u running
which side of the pipe is the Bov on? (cold/hot)
sure it's connected correctly?

k-rok

its connected to the vacum line off the secondary fuel rail, but it didnt work on like 3 other i tried. stock boost. mounted like 4 inches before the TB. rememeber, its a turboed n/a.

Ottoman

do u hear any compressor surge?

u didn't say how much boost or ur bov placement


cuz if the boost is low, and ur bov is on the cold side.. the IC and piping might be absorbing most of the air and not leaving much "shockwave" to pass through the bov


I know my blitz on my TII makes no sound at 5 psi boost on TMIC even..

need at least 10psi for it to make sound. (then it's pretty loud)

dunno how sensitive the low boost valve on the HKS unit is tho...

i've yet to install mine...

88t2romad

tryrunning the line off of a nipple/line that is on the motor side of the throttle body



Are you driving the car around at all? Becasue if your just revving it, it will take quite a big rev to get it to blow off (so that its audible).

TurboIIGuy

It needs at least 8psi to open and even then its not loud at all.
In my opinion a BOV on a stock setup or at least at stock boost is the biggest waste of money.
I usually put cosmo or FD BOV's on my customers cars and they are quite happy with them.
the stock TurboII BOV starts to open and bleed boost at about 6psi or so.
I can't tell you how many cars people have brought me that are fairly stock under the hood with a Boost controller setup for 10psi.
As soon as the car starts to boost there is a large amount of air is already being released from the BOV from the pressure. The when you shift it just barely blows off since it was already half open.
When I swap to a Cosmo or FD BOV it stays closed at 10PSI until a release of the throttle body then it blows off loud as hell. but even those bleed off at more than 11-12 psi. It kind of sounds like an Apex BOV. Just a nice loud smooth rush of air when the FD or csmo BOV opens up.
That's my 2 cents

slpin

iTrader: (9)

^^^^

put your hand over the bov and do a rev and guess what!

it is not a overboost control valve, the vac line pushes the valve close under boost, and when you let off, the vacuum opens the valve

boost pretty much has nothing to do with it, ESP in a ssqv!

TurboIIGuy

Not from my experience. If there isn't enough boost to push that spring open than it's not going to give the desired results.
But thats only form my experience of playing with turbo cars for about 6 years now. So I guess I'm a noob.