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How To Adjust Holley Carburetor Vacuum Secondary Springs

By: Bill Tichenor | 12/02/2009 < Back to Motor Life Home
Holley offers some tips on how to properly operate and adjust four-barrel carburetors with vacuum secondary throttle blades. The video describes the various rate secondary springs, how to change them, and the testing procedures to follow to make sure the secondaries open properly for best performance.
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