Thread: holley 600 help
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Old 09-21-2013, 07:02 AM
  #3  
oldandtired
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Location: Sugar Hill, GA
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There were some carbs in their product offering that worked "backward".
You turn the idle screws counter clockwise (out) to lean the mixture.

This carb also had the double power valve - a little bit for hills and a big shot for passing.
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