Also, if you order a pump cam kit, you will notice that the cams are double profiled. Web pump cam lift vs. It delivers a full shot, quickly. 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. The #1 & #2 refers to the holes in the throttle lever for the screw that attaches the cams, positions 1 and 2.
The #1 and #2 used to be called summer and winter, with winter being slightly more volume due to temps and fuel. The #1 & #2 refers to the holes in the throttle lever for the screw that attaches the cams, positions 1 and 2. Everything is adjusted as it should be. Web primary pump cam is pink with a number 23 nozzle. The yellow and brown cams are for 50cc pumps.
I’m thinking the nozzle should be around 27 on the front, unsure what it should be on the back. 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 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. Web white and pink cams are a good starting point, as they are more linear.
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The most commonly used accelerator pump cam profile is the white version. The #1 & #2 refers to the holes in the throttle lever for the screw that attaches the cams, positions 1 and 2. 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. Web the chart is right. Web these two charts show the lift profile of the various holley fuel pump cams when located using hole 1. 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 pump cam lift vs. The pink cam is the least aggressive cam in the pack. Hold the carb at wot and adjust the spring on the lever for 15 thou clearance between it and the pump arm. The yellow and brown cams are for 50cc pumps. Web white and pink cams are a good starting point, as they are more linear. 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. Web use # 2 holes in the cam and carb positions for starting. The blue cam is the most aggressive cam in the pack. Web the brown is a 50cc pump cam;
Get A #31 Discharge Nozzle Installed.
The pink cam is the least aggressive cam in the pack. Web the chart is right. Throttle position 41r643 yellow 41r336 brown 41r427 blue 41r466 orange 41r290 green 41r240 red 41r218 white 41r330 pink 41r234 black. Remember if you change you pump cam to readjust your accel pump linkage, you don't want to over extend it.
The Yellow And Brown Cams Are For 50Cc Pumps.
Web use # 2 holes in the cam and carb positions for starting. Categories / gauges and gauge accessories As for the pump cams, does what’s in there sound right? Also in plumbing an fittings and hose.
It Delivers A Full Shot, Quickly.
White, blue, red, orange, black, green, pink & brown. This will help you pick the next size up or next size down when changing them out. These cams offer options relative to the amount of pump lift per degree of throttle opening. I’m thinking the nozzle should be around 27 on the front, unsure what it should be on the back.
Web Below Is Pic Of Holley Pump Cams, And How They Deliver Fuel Based On Throttle Positions.
None of this information will mean diddly squat if your pump arm follower. The blue cam is the most aggressive cam in the pack. The chart is for the 30cc pump cams. Web i also run the pink cam on my 600 dp that has been substantially modified for better flow.