Thread: Mechanical or Vacuum Secondaries?
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Old 04-20-2021, 04:29 PM
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Grubby Grubby is offline
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Join Date: Nov 2007
Location: Clayton, IN
Cobra Make, Engine: ERA 838
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I changed a 428 stroker from a 750 vac secondary to 850 double pumper and you couldn't tell it was the same car.

The throttle response was way better and overall power seemed to be more.

John
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