They will not work with 30cc pumps. Web i also run the pink cam on my 600 dp that has been substantially modified for better flow. 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 the chart is right. The pink cam is the least aggressive cam in the pack.
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. None of this information will mean diddly squat if your pump arm follower. Everything is adjusted as it should be. Web here is the chart i like to use and it has done the best for me. Web primary pump cam is pink with a number 23 nozzle.
The chart is for the 30cc pump cams. They will not work with 30cc pumps. Web below is pic of holley pump cams, and how they deliver fuel based on throttle positions. This will help you pick the next size up or next size down when changing them out. In addition to playing with the cam, you can also increase the pump shot from 35 to 50 ccs, but that shouldn't really be necessary.
Carb Science Series — Accelerator Pump Tuning for Holley Carburetors
Holley accelerator pumps/cams Grumpys Performance Garage
Holley vac. sec. question Team Camaro Tech
Holley 50cc Pump Cam Chart A Visual Reference of Charts Chart Master
Holley accelerator pumps/cams Grumpys Performance Garage
Confusion in Tuning the Holley Accelerator Pump Cam CorvetteForum
Holley pump cam color ID info Vintage Mustang Forums
Holley accelerator pumps/cams Grumpys Performance Garage
Holley Pump Cams
Holley accelerator pumps/cams Grumpys Performance Garage
You will also probably wind up playing with squirters if you are trying to fix a stumble. Secondary pump cam is brown with a number 31 nozzle. Remember if you change you pump cam to readjust your accel pump linkage, you don't want to over extend it. If holes 2 or 3 are used, the motion is retarded (moved to the right on the graph by about 5 to 8 degrees). White, blue, red, orange, black, green, pink & brown. They will not work with 30cc pumps. Web below is pic of holley pump cams, and how they deliver fuel based on throttle positions. These cams offer options relative to the amount of pump lift per degree of throttle opening. 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. 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. Everything is adjusted as it should be. The #1 and #2 used to be called summer and winter, with winter being slightly more volume due to temps and fuel. Also, if you order a pump cam kit, you will notice that the cams are double profiled. Hold the carb at wot and adjust the spring on the lever for 15 thou clearance between it and the pump arm. Web the brown is a 50cc pump cam;
The Pump Diaphragm, The Pump Cam And The Pump Nozzle.
Get a #31 discharge nozzle installed. 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 below you will find a chart and graph that illustrate the lift of each colored accelerator pump cam at various degrees of throttle rotation. Web pump cam lift vs.
But That Does Not Seem To Relate With The Chart At All That I Can Tell.
Web the brown is a 50cc pump cam; Everything is adjusted as it should be. Web primary pump cam is pink with a number 23 nozzle. Web here is the chart i like to use and it has done the best for me.
It Delivers A Full Shot, Quickly.
The two positions recenter the cam, and as the chart shows, the effect varies with the cam profile. 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. These cams offer options relative to the amount of pump lift per degree of throttle opening. Categories / gauges and gauge accessories
Also, If You Order A Pump Cam Kit, You Will Notice That The Cams Are Double Profiled.
Secondary pump cam is brown with a number 31 nozzle. Throttle position 41r643 yellow 41r336 brown 41r427 blue 41r466 orange 41r290 green 41r240 red 41r218 white 41r330 pink 41r234 black. Web accelerator pump shot relative to cam color from lightest to heaviest are as follows: The longer the graph the longer the shot duration per pump shot and the shorter the graph the shorter the shot but is a quicker and bigger but less duration of throttle opening.