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Holley 20-12

Holley Accelerator Pump Cam Assortment Includes 8 Different Cams

510-20-12

made in usa
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$28.08
Holley Accelerator Pump Cam Assortment Includes 8 Different Cams $28.08
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Accelerator Pump Cam Assortment
  • Includes 8 Different Cams
  • Holley 20-12 Details

  • Tailor Accelerator Pump Performance
  • Each Cam Is Different Shape/Profile
  • Gives Different Results

  • Specifications:

    Accelerator Pump Cam Material
    Plastic
    Quantity
    Sold as a kit
    Manufacturer's Part Number:
    20-12

    Tailor pump shot to individual engines.
    Includes 8 pump cams to fine-tune your Holley carb's accelerator pump shot. This accelerator pump cam assortment will allow you to "tailor" and fine tune your carburetor for your engine's actual requirements. Each cam has a different shape or profile to give different results. Cam "lift" directly affects the accelerator pump stroke and, therefore, pump capacity. Ramp profile or shape controls the "timing" of the shot. A steeply-rising ramp shape will give a fast, heavy fuel shot right off idle. Conversely, a gently sloping ramp will spread the pump action over a longer period of time.


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    20-12 is rated 5.0 out of 5 by 3.
    Rated 5 out of 5 by from A must have My car bogged from a dead stop , now no hesitation ! A must have to tune your holley to your car . Made a big difference in performance .
    Date published: 2016-09-28
    Rated 5 out of 5 by from I have needed these pump cams a long time . I have a 50cc pump on now and the brown cam works great . Thanks Jegs !
    Date published: 2015-09-16
    Rated 5 out of 5 by from Neccessary for fine tuning Holley carbs! This handy kit is a valuable part of fine tuning Holley carbs! The last Holley I purchased was so far off from right that I spent almost as much on parts to fix it as I did for the Carb, but it was worth it because it performs great now!
    Date published: 2014-11-02
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