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Speedway Motors Bill Smith

Holley 20-12 Accelrator Pump Cams

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Specs
Sold in Quantity:
Set
MFG. Part #:
20-12
Notes
Includes eight different cams and two mounting screws.

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What's in the Box

Includes eight assorted pump cams to fine-tune your accelerator pump shot. Accelerator pump shot relative to cam color from lightest to heaviest are as follows: White, Blue, Red, Orange, Black, Green, Pink & Brown.

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

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Holley Accelerator Pump Discharge Nozzles
                        

A good selection of pump discharge nozzle sizes is indispensable to the proper tuning of the accelerator pump system. The nozzle hole size determines the rate of fuel discharge. A larger hole will "shoot" the fuel at a faster rate with less pressure than a smaller hole. Sizes are stamped on each nozzle. For example the number "31" indicates the nozzle hole size is .031".

Includes one nozzle and two nozzle gaskets. 

The three styles offered are Tube Type, Straight Type, and Center Type. 

 

See Notes tab for what sizes are available for each.

 

 

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Wehrs Machine WM47 Carburetor Feet
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  • 5/16”-18 threads
  • 1-1/2” tall
  • Set of 4 (nuts included)