Newb question.

[HKSenilyks]

This doesn't have anything to do with dsm's, or turbos for that matter. But does anyone know why supercharged cars don't need Blow off valves?
I recently bought a supercharged Buick Park ave. and always wondered. Is it because as the t.b. butterfly closes as the supercharger slow down err....?

[User Name]

A bov is made protect the compressor section of the turbo from damage due to pressure surges, not applicable on SC's.

The supercharger recycles the boosted air back into the intake, so as to minimize parasitic loss.

[Goat Blower]

Superchargers are a little more robust, but the real reason is your car is an automatic. The engine doesn't immediately drop into vacuum from a boosted stated when you let off the gas on an auto. Buick GN's didn't have a BOV from the factory and they were turbocharged, and all were autos.

[HKSenilyks]

Yea I had a turbo sunbird that didn't come stock with a B.O.V. it was also an auto.

[311evo]

you can technically use one, but they wont do much unless ur running alot of boost. there kind of pointless as the main point of having a BOV is to save your turbo from compressor surge.

[Super Bleeder!!]

Depends on the application. Your car has roots blower and its located after the throttlebody.

A lot of the med-hi boost centrifugal kits these days (vortec) do inlcude bovs.

[Kracka]

A lot of the med-hi boost centrifugal kits these days (vortec) do inlcude bovs.

Yup, a lot of the supercharged S2000 guys are using BOV's.

[tpunx99GSX]

actually i dont think even our dsms dont need a bov. I was actually thinking off blocking mine off when i go to the track, that way it holds a little more boost between shifts. (not sure if this will work or not on our cars) My buddy with the S15 Silvia (yes a real one) doesnt run a BOV when he goes to the track and hes on higher boost (17-20).
sure it wears the turbos compressor a little, but for how many times we change turbos, we arent going for longevity anyways.

[Shane@DBPerformance]

I was going to say something, but this thread is retarded.

[Halon]

^
That made me chuckle :)