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Holley Accelerator Pump Cams 20-12

Accelerator Pump Cam Kit, Holley, 2300/4150/4160 Carburetors, Kit

Estimated Ship Date: Tomorrow Would you rather pick it up? Select Location

Brand: Holley

Manufacturer's Part Number: 20-12

Part Type: Carburetor Accelerator Pump Cams

Product Line: Holley Accelerator Pump Cams

Summit Racing Part Number: HLY-20-12

UPC: 090127207451

Accelerator Pump Cam Material: Plastic

Quantity: Sold as a kit.

In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

These Holley accelerator pump cams will allow you to "tailor" accelerator pump performance to the engine's actual requirements. They include cams that have 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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Most Helpful Reviews Review this Product

6 Customer Reviews for Holley 20-12 - Holley Accelerator Pump Cams

Average Customer Review

5 Star

(4)

4 Star

(2)

3 Star

(0)

2 Star

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1 Star

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Nice kit

Summit RacingSummit Racing Verified Purchase

the green cam been the cure all solution for me on 4 separate apps, call me lucky i guess....

1 of 1 found this review helpful.

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Reviewer: DONALD from AL

Date: July 28, 2014

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GREAT!

Helped me get my carb dialed in. Only complaint is no instructions letting me know which cam does what, took some trial and error but in the end I got it. Invaluable in getting a carb tuned properly.

1 of 1 found this review helpful.

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Reviewer: ANTHONY from FL

Date: June 17, 2014

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These cams should fix your acceleration problems

Summit RacingSummit Racing Verified Purchase

With this good variety of cam profiles you will be able to clean up that acceleration stumble, hesitation, bog by changing the amount of, the timing of and the duration of your accelerator pump shot so you can taylor it to the weight of the car as required!!!!!

1 of 1 found this review helpful.

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Reviewer: BARRY from Canada

Date: May 03, 2014

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Pump Cams

Summit RacingSummit Racing Verified Purchase

I have installed a modified motor and am running a Holley Carburetor. This kit allowed me to tweek the carb to run as I wanted and is worth the output.

0 of 0 found this review helpful.

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Reviewer: GARY from OK

Date: February 15, 2015

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Good selection

Summit RacingSummit Racing Verified Purchase

Just wish I didn't have to go online to see the profiles of the cams. There SHOULD be instructions showing the timing of each color.

0 of 0 found this review helpful.

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Reviewer: PETE from CA

Date: February 13, 2015

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Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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