just wanted to know hoe the bov works, what principle thanks for the help

 

I believe when the turbos put pressure on it so it closes. Once you let off, the pressure escapes through the opening and you get that woosh sound.

A pretty vague explaination but I believe its what pretty much happens.

 

ok so i really wanted to know if dirt will mess up my engine for haveing one, i was in deep chat with somone about this

 

No, don't worry about dirt. Think of it as a one-way valve. It will only open if there is pressure in the pipe before the throttle and vacuum after the throttle (i.e. shifting under boost) hence the vacuum line going to it. However it is possible for them to leak under boost.

Sport Compact Car had a good comparison of different BOVs a while back, maybe they have the article on their website. Basically they found out that the first gen DSM BOV is the best even against expensive aftermarket ones. They also tested the FD BOV and it was ok.

 

kool thanks andrew for the info that helped a lot i was chatting with some guy and he he was telling me that the bov will suck in dirt to your engine and im like no that cant be rite so thanks again

 

For most "street" BOV's, they are designed to seal under vacuum.&nbsp Most "race" BOV's (i.e. HKS Race) leak a little under vacuum, so it's not recommended on a street car.&nbsp Other than that, the BOV only opens under pressure, so there is very little chance it'll suck anything in.

Here's how it works...

The BOV is just a vacuum actuated valve.&nbsp There's is a tension spring that keeps it closed under mild vacuum conditions.&nbsp The "trigger" line is run AFTER the throttle body, so when you lift off, the engine goes into heavy vacuum which triggers the BOV to open - this is when you lift off under heavy boost and heavy decel.&nbsp The adjustment ****/bolt/stud on the top of most aftermarket BOV's just adds more tension to the spring, allowing you to fine-tune the triggering point under less than heavy vacuum conditions - this can allow or prevent the BOV triggering while driving casually on the street.



-Ted