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Old 04-09-2002, 10:52 PM
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If you are running a Holley try going down to a lower number power valve (say from 8.5 to 6.5). Vacuum conditions could be causing it to open slightly when you don't need it, this will make a big difference in fuel economy. Other carbs have similar adjustments you can make to them to change the power valve opening, you didn't say what you had.
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