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Old 05-11-2004, 06:26 PM
RedBarchetta RedBarchetta is offline
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Join Date: Oct 2003
Location: Yorba Linda, CA
Cobra Make, Engine: SPF w/392CI stroker
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Default Re: Holley carb help needed

Quote:
Originally posted by davidlee


[b]....BAD stumble at approx 2100 rpm.....I checked the vacuum 16.5-17.5 at idle prox 20 at on load running on the highway. I have not changed the power valve and assume it is 6.5 from the factory.
Aside from running too big a carb, you might not be running the correct power valve (i.e. the factory one is set to open at a much lower "load" vacuum level than your engine may be experiencing). Just something else to consider.....
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