Whats wrong with this pic?
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Joined: Feb 2004
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From: Alexandria La.
X2
I guess they can afford it ,not me though lol. Thanks for the explination also.
I guess they can afford it ,not me though lol. Thanks for the explination also.
the theory behind it.
Normally, your valve is closed when there's no vacuum in the manifold. If you hook up the top side of a gate you'd get what would be normal BOV operation.
Now, on a gate you've still got the bottom port, which would normally be used to apply boost pressure and push open the gate to regulate. But on the intake side, you can put say CO2 on there to hold it open.
So when you stage the car you can basically leave the intake tube wide open and have very little boost, but the actual exhaust side wastegate will stay closed and your turbo will be running near max shaft speed for your launch RPM. Awesome for initial boost response within the first 10 to 60 feet of a pass, but VERY hard on parts
Big turbos have relatively heavy wheels, and that whole inertia thing at 80k+ shaft RPM is what causes all those sheared compressor wheel failures you hear about. atleast IMO
MAX shaft speed, slam the intake gate shut and there's a huge pressure and load spike before the exhaust wastegate can react.
Normally, your valve is closed when there's no vacuum in the manifold. If you hook up the top side of a gate you'd get what would be normal BOV operation.
Now, on a gate you've still got the bottom port, which would normally be used to apply boost pressure and push open the gate to regulate. But on the intake side, you can put say CO2 on there to hold it open.
So when you stage the car you can basically leave the intake tube wide open and have very little boost, but the actual exhaust side wastegate will stay closed and your turbo will be running near max shaft speed for your launch RPM. Awesome for initial boost response within the first 10 to 60 feet of a pass, but VERY hard on parts
Big turbos have relatively heavy wheels, and that whole inertia thing at 80k+ shaft RPM is what causes all those sheared compressor wheel failures you hear about. atleast IMO
MAX shaft speed, slam the intake gate shut and there's a huge pressure and load spike before the exhaust wastegate can react.
Wow, I feel like an *** now. I was laughing, and now I'm not. Learn something new every day I guess. Strange concept, but I guess it works. Definitely not something we'd see on a driver, but a drag car it makes sense!
Yeah, basically the exhaust housing gets ALL the exhaust and the WG acts like a boost controller on the intake charge, regulating the how much makes it in...
That's hard on the turbo though!
But why the BOV on the exhaust side? How does that work?
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