Installed A Bov Not Boosting?

[Woody1]

Hey i installed a BLITZ BOV and now i am only boosting to 5 PSI but if i use the stock BOV it works fine? i know the BOV is not fualty because i have used it before and on another car, could it be that i put it futher down the pipe then the stock bov? i welded the flange onto the pipe near the FMIC so that i would get done everytime the TASK FORCE lidted my bonet? or could it be that the vaccume pressure isnt strong enough to reach the distance or the lines i am using are crimping under pressure because they are not strong enough?

Any help would be good

[HackerX]

Air leak?

did you remove any pipes to install it and is everything clamped back up properly?

[Woody1]

no Air leaks, like i said if i turn the stock BOV on and just disconect the Vac line to the Atmo BOV (thats hidden) everything works fine, so i realy dont know what the go is, maybe loss of pressure from the longer distance but i have seen alot of other cars with the BOV hidden and they seem to bost right

[TTT]

so you still have the stock bov on at the same time as the blitz one?

and you are just disconnecting the vacuum line to the stock bov?

that's your problem.

it will open up..

you have to remove the stock bov and block off the vacuum line, and the other 2 holes for bov and bov return.

then connect vaccum line to blitz show off valve and it will boost and everyone will look at you and go "sik mate sik"

[Woody1]

Ohhh, gay just dont fully understand how the stock Bov would open if there is no vac line on it to make it pop open?

[TTT]

if you take the stock bov off (or any bov for that matter) and jam your thumb up it's arse (so to speak), you will be able to push the piston in by hand.

now.

with aftrmarket bovs, you can adjust the piston tension.

by making it tighter, you make it harder to open.

but the stock bov just sits shut against the hole.

not much is required to make it open.

when on the car, you have air under the bov, and air in the vacuum line on top.

So. at idle, your boost gause will show a vacuum reading or some sort.

that means that the bov will be shut as it has x amount of air pressure (vacuum) in the intercooler pipe under it and the vacuum line above it.. so no pressure means it stays shut.

get on boost and all this pressure builds up under it and tries to open it.. but the vacuum lne on top is also providing the same amount of pressure as it is seeing boost from the the manifold.

so the bov stays shut.

you get off the gas and step on the clutch to chane gears and if you notice your boost gauge, it shoots waaaay down the vaccum side.

at this very moment, all the boost your turbo was creating is still pressured up in the intercooler pipes.

But the vacuum line above the bov is seeing vacuum (as per your boost gauge) from the manifold so it is trying to SUCK the piston up.

this vacuum line sucking and intercooler pipes filled with pressure opens the bov and pssh comes out.

NOW.

If you have disconnected the vacuum line on top..

what happens?

you accelerate, create boost, boost builds up in the intercooler pipes, pushes against the bov piston.

since there is no line above it showing the same boost, it "IS ABLE" to push the bov open.

and 5psi is enough to push it open and there is your problem.

and end of my essay

solution.

remove blitz blow job valve.

sell to some ricer.

fit stock bov and all lines and enjoy a problem free car.

[Woody1]

Thank you very much that was very helpful =D

[BAMR33]

When you say 'another car' what was the other car? Increased boost pressure and airflow can affect the operation of a BOV.