HellRaiser

iTrader: (9)

I have the tial 50mm BOV and I noticed today while I had the hood open that the valve was open at idle. I gave it a little throttle and it would close but when you let off the throttle it would pop wide open and then settle but still stay open. Is this normal?

Brent@LPE

yes BOV works off of manifold vacum, when throttle blades are closed vacum is present valve opens this is how it works....
cheers....

HellRaiser

iTrader: (9)

Good I thought it was just kinda strange.

Louis

iTrader: (7)

Depends on the setup really. Some twin setups must be open to prevent slosh or surge. Part throttle stuff most require them to be open.

y2khawk

iTrader: (5)

hmm

I had to cut the springs down to make mine open at idle. But my cam made very little vac. What's your idle vacuum?

As long as it's before the MAF, it don't matter. If you're SD, it really don't matter

HellRaiser

iTrader: (9)

The BOV is berfore the MAf and the car makes around -20 vacuum.

frcefed98

iTrader: (16)

well I guess I have to cut my spring down some more..mine is shut at idle..
I have a pretty large cam and its killing VAC so I guess i'll be chopping it in a few
J

will62085

iTrader: (4)

my turbosmart instruction manual says it should be shut at idle, heres the quote directly from it;

"- Adjustment to the BOV III PB is made by rotating the cap (see figure 1), to increase spring tension rotate in the direction of hard, marked on the top of the cap
- Rotate the cap in the direction of soft to decrease the spring tension – CAUTION Do not rotate the cap beyond the indicator groove (see figure 1)
- With the engine at idle the exhaust port should be closed off by the piston – the piston should be hard against the seat and not floating or moving
- Free rev the engine and back off quickly, the engine should return to normal idle speed – if the engine drops below idle or stalls increase the spring tension by half a turn
- Repeat this process until the engine free revs and returns to normal idle speed"

i know your using tial but they all operate the same...

frcefed98

iTrader: (16)

Well good? Got two conflicting things now Maybe I'll just leave it alone....but it would be cool to have it bypassing at idle and cruise...hmmm....

I really trust what harlan sezs too so

HellRaiser

iTrader: (9)

Yeah I am with ya on that. His car does wheelies..........

frcefed98

iTrader: (16)

And he's been doing the turbo thing with stenod and his ride for a lot longer and with more success than a lot of people here so i'll stick to what harlan sez....and he does wheelies...but so does my car

2000 Tran Zam

iTrader: (2)

i gotta huffy that will put your cars to shame

METAL MAN

Open is fine for a MAF car, that is long as it's before and not after the MAF.