340HP

Common sense tells me, it should.. Right? I mean, the whole purpose of a BOV is so that you don't destroy your turbine when the compressed air bounces off the throttle plate (while shifting) and rushes back towards the compressor. The BOV vents the air and you hear a whoosh.

A centrifugal SC works similarly to a turbo (which needs a BOV), except that it's powered by pulleys and a belt, not the exhaust.

Thoughts?

dansouliere

Yes it does.. but when I had the vortech kit on my Stang it was not a traditional BOV it was a plastic looking POS and was almost silent.

joust75

iTrader: (1)

I would say no. The turbine on an sc spins only as fast as the engine does, and when the engine winds down it forces the turbine to do so as well.
With a turbo the inertia keeps the blades moving longer thus providing boost for longer. The Bov is more necessary in this application.
However I know vortech supplies a BOV, but because the pressure is reduced more immediately before the BOV activates than a turbo you dont get the familiar (and to some desireable) BOV squishhhhh.
Never a bad idea to have a BOV. Strangly enough, I know the Greddy TT comes without one.
I am going SC, but I love the BOV sound so I am upset to know I will not be getting to experience it.

booger

iTrader: (6)

yes ...on a 350z and g35 you need the BOV . If you dont have one , the pressure has no where to go when you let off the gas and will cause compresser surg . Comp . surge will cause your blower to fail sooner or later

Lawn Dart

iTrader: (4)

Most use a compressor bypass valve. It eliminates compressor surge by venting discharge air back to the inlet side of the compressor.

340HP

I want the squishhhhh sound. I miss it from my Talon TSI. Might have to go with a turbo.

Lawn Dart

iTrader: (4)

I suppose you could remove and block off the bypass valve, then install a blow-off valve.

wick3d350Z

is 400rwhp and 350rtq accomplishable with the vortech system? what has to be done to do it?

booger

iTrader: (6)

The 400whp is obtainable . the 350trq is going to be hard . With a one step smaller serp pulley , most are making 390whp and 300 to325 trq . The Vortech kit comes with a BOV . Its a Mondo BOV and it whistles very loud untill it closes and you get into boost . I put a filter on it and stuffed it full foam , to quiet it down

340HP

Ah, that's good news. Thanks for the info.

qwkphkr

A compressor bypass valve and a blow off valve are the same device. The one described in the pics above is simply vented to the intake v/s the atmosphere. Generally, a 7psi system will not make much noise blowing off and may not be noticeable inside the car. That doesn't mean that there is no need for it. The air slamming back into the compressor blades when the throttle closes does create a great deal of stress on the compressor shaft bearings as booger suggests and will eventually cause failure.

340HP

That's more good news! Thanks for input.

With the 430 stroker and the Vortech SC, you could do more than 9 PSI tho..