accelerato pump adjustment - Team Camaro Tech
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post #1 of 3 (permalink) Old Nov 29th, 03, 04:55 PM Thread Starter
Join Date: Aug 2003
Posts: 14

I have a 600 holley which I am trying to adjust the accelerator pump arm clearance. I can not get the arm tight at idle. I turned the nut all the way up and down and still can not get tight. Is it best to turn the bottom nut or the top nut. In the past I held the bottom nut while I turned the top nut. What am I doing wrong I seriously need help.
silver67 is offline  
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post #2 of 3 (permalink) Old Nov 30th, 03, 04:15 PM
Join Date: Oct 2002
Posts: 41

The pump should be adjusted so there is about .015 clearance with the butterflies wide open. Here is a link to Holley's website: At the bottom of the page is a diagram of how to adjust the accelerator pump.
gary754 is offline  
post #3 of 3 (permalink) Old Nov 30th, 03, 06:55 PM
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Join Date: Mar 2002
Location: Austin, TX, USA
Posts: 5,277

If you are following the procedure, there are a couple other possibilities. First, some cams won't line up well with the arm. In smoe cases, you have to bend the rod that rides on the cam.

A road I once followed is trying to fatten up the shot by installing more agressive cams to compensate for a hesitation problem. I also used hole #2 in a couple of cases. What I found was that I had another issue (vacuum leak and timing problems). I dropped back to an orange cam in hole #1, and everything setup properly.

68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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