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Anonymous
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Hi can someone please tell me how do you set up the the accelerator pump on a 350 holley
Get Dave Emanuel's Holley book from the early 1980's. There is no subsitute.
It coveres the set-up of the accelerator pump, the squirters and the placing of the spring on the cam. There are a few different types of plastic cam, which profiles the discharge.
I could give you a long rambling talk, but it would only be a poor copy.
Other Holley books are simpler and a bit more user friendly, but none better than his.
(Only other things I'd add is
1.Never tune a car by braile. You can't randomly try a bunch of settings unless you understand what it is your trying to do.
2.A Holley with dirty fuel is worse than useless. Any issues with accelerator pump set-up are best takled when the main jets and power valve are set.
3.A 350 cfm carb is only a 130-150 flywheel hp device, tops. A Weber ADM 34 is infact a better carb.
4.If you want push-you in the back response, take a 2-5 mpg fuel consumption drop and get a 500 cfm carb.)
5.If you drop the fuel pressure to 2.5 to 3 psi rather than 5 to 6 psi, the fuel consumption will improve. You may find this requires bigger squirters, a different cam position.
6.Power valves should be a lower vacuum number than what it would be on the Chev/AMC/International V8's the 350 cfm carb was first designed for in the early sixties. A 10.5 power valve will be running too rich on a high performance six cylinder car, even the 8.5 may be too rich on the highway. Go for a 6.5 for a start.)
It coveres the set-up of the accelerator pump, the squirters and the placing of the spring on the cam. There are a few different types of plastic cam, which profiles the discharge.
I could give you a long rambling talk, but it would only be a poor copy.
Other Holley books are simpler and a bit more user friendly, but none better than his.
(Only other things I'd add is
1.Never tune a car by braile. You can't randomly try a bunch of settings unless you understand what it is your trying to do.
2.A Holley with dirty fuel is worse than useless. Any issues with accelerator pump set-up are best takled when the main jets and power valve are set.
3.A 350 cfm carb is only a 130-150 flywheel hp device, tops. A Weber ADM 34 is infact a better carb.
4.If you want push-you in the back response, take a 2-5 mpg fuel consumption drop and get a 500 cfm carb.)
5.If you drop the fuel pressure to 2.5 to 3 psi rather than 5 to 6 psi, the fuel consumption will improve. You may find this requires bigger squirters, a different cam position.
6.Power valves should be a lower vacuum number than what it would be on the Chev/AMC/International V8's the 350 cfm carb was first designed for in the early sixties. A 10.5 power valve will be running too rich on a high performance six cylinder car, even the 8.5 may be too rich on the highway. Go for a 6.5 for a start.)
sir, open the throttle to full throttle. i believe a .015 thou feeler guage is then inserted between the pump arm & the lever off the plastic cam.adjust the bolt to bottom the pump diaphram with the .015 feeler guage under the adjusting bolt to lever. return the throttle to closed position. make sure there is no freeplay in the linkage of course with the feeler guage now removed. good shooting. william
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Anonymous
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thanks for the info. Was111 this is just what I needed to Know
Regards
Regards
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