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Holley Pump Cam Chart

Holley Pump Cam Chart - Web these two charts show the lift profile of the various holley fuel pump cams when located using hole 1. The pink cam is the least aggressive cam in the pack. The two positions recenter the cam, and as the chart shows, the effect varies with the cam profile. Also in plumbing an fittings and hose. These cams offer options relative to the amount of pump lift per degree of throttle opening. The yellow and brown cams are for 50cc pumps. Web below you will find a chart and graph that illustrate the lift of each colored accelerator pump cam at various degrees of throttle rotation. Everything is adjusted as it should be. As for the pump cams, does what’s in there sound right? Web use # 2 holes in the cam and carb positions for starting.

Utilizing this chart will help you determine the correct accelerator pump cam for your specific application based on how aggressive the accelerator cam profile is. Categories / gauges and gauge accessories This will help you pick the next size up or next size down when changing them out. Web i also run the pink cam on my 600 dp that has been substantially modified for better flow. Remember if you change you pump cam to readjust your accel pump linkage, you don't want to over extend it. Web pump cam lift vs. Web when you look through holley literature and videos regarding tuning the accelerator (squirter) pump cam, most say to use position 1 (smaller squirt later) for heavy cars and position 2 (bigger squirt earlier) for a light car. Everything is adjusted as it should be. Web the brown is a 50cc pump cam; Hold the carb at wot and adjust the spring on the lever for 15 thou clearance between it and the pump arm.

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The #1 & #2 Refers To The Holes In The Throttle Lever For The Screw That Attaches The Cams, Positions 1 And 2.

My combination and dyno sheet: Web white and pink cams are a good starting point, as they are more linear. Web accelerator pump shot relative to cam color from lightest to heaviest are as follows: The yellow and brown cams are for 50cc pumps.

Secondary Pump Cam Is Brown With A Number 31 Nozzle.

None of this information will mean diddly squat if your pump arm follower. You will also probably wind up playing with squirters if you are trying to fix a stumble. This will help you pick the next size up or next size down when changing them out. Also in plumbing an fittings and hose.

Web Accelerator Pump Cams On Holley Carbs Can Be Swapped Out To Deliver Advanced Or Delayed Accelerator Pump Delivery Depending On Your Engine's Normal Idle Speed.

Web these two charts show the lift profile of the various holley fuel pump cams when located using hole 1. They will not work with 30cc pumps. But that does not seem to relate with the chart at all that i can tell. The two positions recenter the cam, and as the chart shows, the effect varies with the cam profile.

Remember If You Change You Pump Cam To Readjust Your Accel Pump Linkage, You Don't Want To Over Extend It.

In the days of `57 ford 312’s and `60 dodge 383’s the purpose was for a summer and winter setting of the accelerator pump. Holley includes a graph in the catalog we’ve reproduced for this article that shows how each of the cams alter the lift curve. Web here is the chart i like to use and it has done the best for me. Categories / gauges and gauge accessories

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