11-03-2013, 05:47 PM
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CC Member
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Join Date: Jul 2005
Location: Bartlett,
Ill
Cobra Make, Engine: Everett-Morrison LS1
Posts: 2,448
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Not Ranked
for racing take out the power valves--your probably backing out of the throttle enough that manifold vacume builds up and closes the power valves---add about 4 or 5 jet sizes for starters when you remove the PV
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