05-15-2013, 01:15 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Your heads must perform horribly. To peak at only 5000 with the cam that you have says something for how efficient the heads and intake are.
I use similar durations on engines that are 40 cubes bigger than yours and peak 1000 rpm higher.
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