SECONDARY LINKAGE SCREW

Old 06-01-2011, 03:32 AM
  #1  
JEFF69Z28
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Default SECONDARY LINKAGE SCREW

THERE IS A ADJUSTMENT SCREW ON THE SECONDARY SIDE OF MY CARB WHAT IS THIS FOR AND HOW DO I KNOW WHEN TO ADJUST IT IF NEEDED?
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Old 06-01-2011, 04:46 AM
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curtisreed
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Are you talking about the secondary idle adjustment screw? If so it allows you to adjust the idle on a car with low vacuum/big cam, without uncovering too much transfer slot in the primaries.

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Old 06-01-2011, 05:00 AM
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JEFF69Z28
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INSTEAD OF RAISEING THE IDLE WITH THE PRIMARY ADJUSTMENT SCREW I CAN RAISE IT MORE IF NEEDED WITH THE SECONDARY SCREW.
900 RPM WITH PRIMARY & 200 MORE WITH SECONDARY.
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Old 06-01-2011, 05:05 AM
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hammertime
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They are normally adjusted the same, if the primary is in say 4 turns, the secondary is in 4 turns also.
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Old 06-02-2011, 07:52 PM
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markdunlap
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Default secondary

I like to take the primary to a minimum position and then adjust the secondary to get the RPM I want. I think the carb is more responsive off idle that way. Just my opinion.
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