[97TunedMustang]

Ive already read practically everything on how BPV's function and what their purpose is and how BOV's also function. Now if you hang with me on this i want to know if this sounds feasible. There is an outlet on the Air intake for extra air to travel to the BPV when the throttle abruptly closes correct. same idea with a turbo setup. Now the line off the intake goes to the BPV. Say you removed the BPV and connected the bottom of a BOV to that instead. Now the other tube off the side of the bypass is going back into the supercharger as recirculated air. not enough pressure behind it anyway when its exhausted into the super to considerably speed it up or slow it down. It seems plausible you could seal off this connection with no adverse effects to the supercharger. its just extra air anyway. Now at this point you have an extra vaccum line originally off the top of the BPV which you really dont need at this point. again i dont believe it would adversely affect the supercharger. Now at this point you have a BOV attached to the output for excess air on the intake. if the BOV is set to release that air into the atmosphere at 7psi or higher as a stock BPV would back into the supercharger it should serve the same purpose. At this point youd have a supercharged engine with a Vrmmm PShhhh of a turbo'd setup. i just got to thinking so... does it sound reasonable ... or am i totally insane?

Even turbod engines can have CBV's to return the excess air to the turbine rather then vent it in a BOV setup so why cant the same thing work with a s/c? or can it..

[mdvaldosta]

A BOV is simply a bypass valve that gets vented to the atmosphere. They do the same thing, only one vents to the atmosphere the other back to the intake tract. You can put a blowoff valve on a supercharged car so long as the mass air meter is setup for blow through, that way you don't vent off metered air.

[87vert]

if you want it to act like a turbo just get a turbo

[JunkyardTurbos]

It looks like you are draw-through. You can't do a BOV. Like mdval said, a BOV vents into the atmosphere. You'll be blowing metered air out. You need a bypass valve that routes the metered air back into the intake. It still goes psssssshhhh though.

[Grinster24]

From what I've heard most s/c don't make enough boost to have a BOV become efficient. But just passing info I have heard.

[03blownmach1]

I thought 8lbs of boost from a S/C is same as 8lbs from a turbo?

[mdvaldosta]

Originally Posted by Grinster24 From what I've heard most s/c don't make enough boost to have a BOV become efficient. But just passing info I have heard.

Doesn't work that way, the only difference between the two is where they vent too. Other than that their identical pieces.

Originally Posted by 03blownmach1 I thought 8lbs of boost from a S/C is same as 8lbs from a turbo?

You get the same amount of air flowing through both ways, but a S/C requires power from the crank to spin it (costing horsepower), whereas a turbo uses spent exhaust gas (which only causes a slight restriction) to power it.

Therefore, a turbocharger will produce more power than a supercharger at all boost levels.

[ttop5.0]

this guy knows his stuff man i'm tellin you, my god....

[BriansTib]

a BOV probably wouldnt work on a S/C. Turbos force in air, so when the TB closes, there is a build up of pressure and it opens the BOV and vents out. On a super charger (roots type), its sucking in air, plus the supercharger itself if behind the TB. So unless its a centrifugal supercharger, you wont see a build up of pressure before the TB when its closed.

You could do it on a centrifugal because the supercharger is before the TB and there would a pressure build up between shifts or when the TB closes.

[ChrisJ]

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