Holley Accelerator Pump Cam Chart - Web the brown is a 50cc pump cam; Holley includes a graph in the catalog we’ve reproduced for this article that shows how each of the cams alter the lift curve. They include cams that have a different shape or profile to give different results. Each cam is different shape/profile. I just changed out accelerator pump cam originally pink on my quick fuel carb to white (natural) in the #2 spot. This product is universal and applies to all vehicles.
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. Here's a picture, double pumper on the left, vacuum secondary on the right. Its purpose is to inject a certain amount of fuel down the throttle bores when the throttle. White, blue, red, orange, black, green, pink and brown. If holes 2 or 3 are used, the motion is retarded (moved to the right on the graph by about 5 to 8 degrees).
Here's a picture, double pumper on the left, vacuum secondary on the right. The only way these charts and graphs are going to have any meaning is to spell out the cc’s discharged per the various opening angle (say 10degree increments) of the throttle for one stroke. Web pump cam lift vs. Each cam is different shape/profile and gives different results. Throttle position 41r643 yellow 41r336 brown 41r427 blue 41r466 orange 41r290 green 41r240 red 41r218 white 41r330 pink 41r234 black.
The chart is for the 30cc pump cams. But that does not seem to relate with the chart at all that i can tell. Switching cams will directly affect the movement of the accelerator pump lever and, subsequently, the amount of fuel available at the pump nozzle. Cam lift directly affects the accelerator pump stroke, and, therefore, pump capacity.
#1 · Sep 21, 2020.
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. Kit includes a helpful tuning chart to assist you in selecting the appropriate accelerator pump cam; The pump diaphragm, the pump cam and the pump nozzle. Contains 8 cams and 2 screws
Web Holley Accelerator Pump Cams Will Allow You To Tailor Accelerator Pump Performance To Your Engine's Actual Requirements.
Holley accelerator pump cams will allow you to tailor accelerator pump performance to your engine's actual requirements. Color coding makes it easy to identify specific cam applications when installed; After all we don’t sit there and pump the gas ten times. If holes 2 or 3 are used, the motion is retarded (moved to the right on the graph by about 5 to 8 degrees).
They Include Cams That Have A Different Shape Or Profile To Give Different Results.
Then change the squirter nozzles from.033” to.025”. Here's a picture, double pumper on the left, vacuum secondary on the right. This product is universal and applies to all vehicles. Web earls classic hose and hose ends.
728 Posts · Joined 2009.
Note on the upper left of each carb, the dp has linkage attached to the base plate/throttle shaft that actuates the secondary pump lever. Hi, so i have the rest of my 670 street avenger carb on my 360 tuned in now pretty good. Switching cams will directly affect the movement of the accelerator pump lever and, subsequently, the amount of fuel available at the pump nozzle. Its purpose is to inject a certain amount of fuel down the throttle bores when the throttle.
The chart is for the 30cc pump cams. 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. Hi, so i have the rest of my 670 street avenger carb on my 360 tuned in now pretty good. White, blue, red, orange, black, green, pink & brown. 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.