Two questions.

Can you use Holley accelerator pump cams on Demon carbs?

Does any one have description of the accelerator pump cams? (i.e. which cam gives a short shot etc?)

http://www.goprp.com/extra/pumpcams.gif

That's an awesome chart - which axis is for time?

I don't think time would be a factor in this chart. I can only assume that it's cc (the y-axis) vs. degrees of possible rotation of the pump cam in percentage (the x-axis). The y-axis is the actual flow of one pump shot. 30cc pumps are actually 3cc pumps- Holley rates them per 10 shots.

That makes sense. The quicker the ramp-up in the chart (more shot with less cam rotation)the quicker the shot ("time") - exactly the info I was looking for.

For example, the blue cam in position 2 will give more gas initially than say a red or orange cam in position 2, even though the total shot ends up being the same. Great info, thanks for posting it.

Thanks for the awesome chart! graemlins/hurray.gif

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