10-31-2010, 06:05 PM
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CC Member
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Join Date: Jul 2002
Location: Greenville,sc,
SC
Cobra Make, Engine: Kirkham 427 (KMP 266); CAV GT40
Posts: 1,464
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Not Ranked
most of the research I did led me to conclude that anything over 3/4 turn out meant that your idle jet was too small. I would agree that going to the 70 jet is the right idea, assuming you have 2 progression holes. With 3 holes you can get by with a smaller jet. You need to be concerned about cylinder washdown with the idle screw turned so far out I would think
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SPF Daytona coupe 055, Roush 427R
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