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Does an exhaust crossover matter under boost?

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Old Apr 15, 2010 | 09:45 PM
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Default Does an exhaust crossover matter under boost?

I'm going to go true duals once I get my car boosted. I'd like to keep it simple and go straight back from the headers and over the axle. I understand most people use an X or Y pipe for backpressure/scavenging. How much HP will I lose not having a crossover. It'll be so much easier/cleaner not running one, but if its going to hurt numbers too much, I'll figure a way to run an Xpipe.

Thanks!
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Old Apr 16, 2010 | 09:21 PM
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A crossover or x-pipe needs exhaust pulses to scavenge effectively. Downstream of the turbo, the exhaust pulses are pretty much "chopped up" by the turbine wheel, there are no realistically no pulses left. There is no gain to running an x-pipe post-turbo. Just make it smooth and free-flowing and you should be good.
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Old Apr 16, 2010 | 09:59 PM
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Originally Posted by Uglydog56
A crossover or x-pipe needs exhaust pulses to scavenge effectively. Downstream of the turbo, the exhaust pulses are pretty much "chopped up" by the turbine wheel, there are no realistically no pulses left. There is no gain to running an x-pipe post-turbo. Just make it smooth and free-flowing and you should be good.
He has a Vortech not a turbo.

X pipe should be fine.
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Old Apr 16, 2010 | 10:33 PM
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Thanks, found what I need then-> http://www.summitracing.com/parts/BIG-53631FLT/
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Old Apr 16, 2010 | 11:58 PM
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It will help on a blower car. It is also a good place for a WBO2 sensor to get an average3 reading from both banks.
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Old Apr 17, 2010 | 02:38 PM
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oops you're right. Should have read the sig. Definitely get the xpipe.
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Old Apr 17, 2010 | 08:06 PM
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Thanks all, going with summit Xpipe + Magnaflow 4x9 mufflers.
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