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look at this dyno. why dose the Torque fall?

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Old 12-16-07, 03:46 PM
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look at this dyno. why dose the Torque fall?
I’m jut trying to find out why the torque begins to plummet after 6500rpm at 20lbs of boost. Any ideas?
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Old 12-16-07, 05:24 PM
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That's a sign of too much backpressure, your turbine housing is too small imo.
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