BOV's

[T0nyGTSt]

Originally posted by GTST

Mitsubishi Cordia

Holden Commodore VL turbo just to name 2, never came with standard BOVs.

These also never had intercoolers... at all.

This tells you that they were early 'not really high performance' turbo cars.

T.

[GOTRICE]

man all intercoolers do is produce lag, only babies buy them:p

[Sydneykid]

Hi guys can someone explain to me how having a BOV vented to the atmosphere increases pollution? No not noise, that isn't the issue, unless it's over the DBA limit of course. The BOV only opens when the throttle is closed and when the throttle is closed the PCV valve draws air from the cam cover venting into the engine where it is combusted and cleaned by the cat.

So if everything is working OK, the only thing that comes out of the BOV is what went through the air filter. Since the air filter cleans out some crap, I would have thought the EPA would be happy with BOV's vented to atmosphere as they clean up the air for us to breath.

Try that next time the pesky pests annoy you.

[T0nyGTSt]

Yeah but that assumes your engine and BOV are in perfect running order. I would imagine there would be a number of incidences where a sick engine/turbo can spew noxious gases out of the BOV. Also would a venting BOV make the engine run rich? Changing these circumstances would increase noxious emissions?

T.

[Sydneykid]

Hi Tony, a couple of comments following on from your last post.....

"assumes your engine and BOV are in perfect running order"

So the pesky pests should be checking badly running cars, not ones with atmosphere vented BOV's. I followed a car to work this monring that was spewing so bad I had tears in my eyes, had to put the A/C on recirc.

"Also would a venting BOV make the engine run rich"

Yep, but not as much as when the engine is cold. At least the cat will be warmed up when the BOV vents and do something about it. When the engine is rich and cold, so is the cat, so it don't do squat.

Hope that adds to the discussion.

[TTT]

on my old liberty RS, I used to get a little bit of oil comming out of my atmo bov..

can anyone tell me why this was?

[Jimbo2000]

Can you make all BOV's plumbback, or only specially designed ones?

i am not a riceboy but dont have a big adversion to the noise as long as it only comes on when boosting.

But i dont really want a atmo venting one as i couldnt be bothered with the hassle from the cops

yes i will be running large amounts of boost on occasion

[TTT]

not all bovs can be made plumb back..

like the turbosmart type 2 or any others where the air gets released through a series of holes..

you'd need a bov that releases from a single area that you can put a hose over and connect back to the inlet.

[Jimbo2000]

does that still make the ricey noise?

[TTT]

no.. if you have a pod filter, you will hear a slight whooshing sound between gear changes but no ptshhhh like normal..

if you have a standard air box, then you will probably hear nothing..

[Jimbo2000]

thanks for the help mate.