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How To Adjust Holley Carburetor Vacuum Secondary Springs

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.


 


More Videos...


How To Adjust The Accelerator Pump On Holley Carburetors
How-to adjust the accelerator pump on Holley carburetors to avoid stumbling and hesitation upon acceleration. Tips include: How to check for the clearance between the accelerator pump diaphragm arm & operating lever; how-to select the correct accelerator pump nozzle size, and accelerator pump cam selection and installation. Additional information can be found on Holley's website: http://forums.holley.com/entry.php?428-How-To-Cure-Carburetor-Stumble





Holley 750 cfm 4150 Rebuild A to Z with a Percy's Adjust-A-Jet Addition Vacuum Secondary
Pretty typical vacuum secondary Holley rebuild. Newer Holley carbs come with power valve blow out protection. This is a old carb.





Holley Carburetor Tuning Secondary Circuit - Summit Racing Quick Flicks
Norm walks you though how to properly adjust the secondary circuit on a Holley 4 Barrel Carburetor. Vacuum Secondaries or Mechanical Secondaries it doesn't matter, Norm has you covered and achieving that top end speed. Find everything you need for your Holley Carburetor at http://www.summitracing.com/redirect?banner=SocialYT4535





Vacuum Lines Connection
Footage taken from Holley Carburetor Installation & Tuning DVD





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