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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 10-07-2007, 10:59 PM   #11
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The rear manifold is either capped at the exit or a custom one is used.
See that large single pipe that comes out of the turbo and makes the downpipe? That'* where the exhaust comes out.
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Old 10-07-2007, 11:52 PM   #12
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Yes, I see it now.
The rear exhaust connection is blocked off and only used as a mounting support.
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Old 10-08-2007, 12:29 PM   #13
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Oh, ok, thanks for clearing that up!
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Old 10-08-2007, 12:31 PM   #14
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Quote:
Originally Posted by Foghorn
Quote:
Originally Posted by chadow427
I don't think so Bill, thats just the crossover from the front to the back, the exhaust on the backside of the turbo just hooks up to the rear manifold, and the gas continues on to the downpipe and out the car.
Negative.

The rear manifold feeds the turbo. The usual downpipe position is connect to the BOV while what used to be the crossover pipe connection on the rear manifold is then routed to the turbo.

The Cartuning setup, as well as the Statama, have both engine banks driving the turbo. There'* no other practical way to do it.

Cheers,
So basically that rear manifold can't flow that well, the angle'* all wrong, isn't it?
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Old 10-08-2007, 01:03 PM   #15
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Quote:
Originally Posted by chadow427
[

So basically that rear manifold can't flow that well, the angle'* all wrong, isn't it?
Hence why, as mentioned above, a lot of guys will put on an Fbody manifold, or have a custom one made. Flow is important, but it doesn't have to be the best with boost. It'* also important to keep the exhaust hot until it gets into the Turbine housing, if the exhaust cools to much it wont spool the turbo as quickly.

It'd be almost impossible to have one manifold dump into the exhaust, and one into the turbo. Each bank would require very different tuning due to backpressure/scavenging differences.
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Old 10-08-2007, 01:11 PM   #16
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Hell, the big power guys have problems popping pistons because of unequal pressures in the stock manifolds. I thing trying to run a turbo off one bank would probably blow it sky-high.
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Old 10-08-2007, 02:32 PM   #17
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Quote:
Originally Posted by chadow427
Quote:
Originally Posted by Foghorn
Quote:
Originally Posted by chadow427
I don't think so Bill, thats just the crossover from the front to the back, the exhaust on the backside of the turbo just hooks up to the rear manifold, and the gas continues on to the downpipe and out the car.
Negative.

The rear manifold feeds the turbo. The usual downpipe position is connect to the BOV while what used to be the crossover pipe connection on the rear manifold is then routed to the turbo.

The Cartuning setup, as well as the Statama, have both engine banks driving the turbo. There'* no other practical way to do it.

Cheers,
So basically that rear manifold can't flow that well, the angle'* all wrong, isn't it?
Yep, you're right about that.

I think Cartuning has a cheap modified rear manifold available, they change #6 primary to flow in the direction of the turbo as opposed to flowing toward the old downpipe.

Cheers,
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