Holley accelerator pump
From Crankshaft Coalition Wiki
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The drawing below shows the transition slot as seen with the carb held upside down. The drawing on the left shows an overexposed transition slot. Baseline the throttle blades to give a transfer slot that looks like the image below, right (approximately as long as it is wide, or about 0.020", up to 0.040"): | The drawing below shows the transition slot as seen with the carb held upside down. The drawing on the left shows an overexposed transition slot. Baseline the throttle blades to give a transfer slot that looks like the image below, right (approximately as long as it is wide, or about 0.020", up to 0.040"): | ||
| − | [[File:Holley | + | [[File:Holley t-fer slot.jpg]] <br style="clear:both"/> |
From this point, if the idle speed is increased to the point where the transfer slot becomes over exposed, a poor idle and off-idle transition can be the result. One sure sign of this is the idle '''''mixture''''' screws do not cause the idle to change when turned in or out. Usually, adding initial timing to increase the idle speed will allow the throttle blades to be closed down some using the curb idle screw. This will return the idle mixture screws to normal and the idle will be smoother and cleaner, as will be the transition from idle to main circuits. | From this point, if the idle speed is increased to the point where the transfer slot becomes over exposed, a poor idle and off-idle transition can be the result. One sure sign of this is the idle '''''mixture''''' screws do not cause the idle to change when turned in or out. Usually, adding initial timing to increase the idle speed will allow the throttle blades to be closed down some using the curb idle screw. This will return the idle mixture screws to normal and the idle will be smoother and cleaner, as will be the transition from idle to main circuits. | ||
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[[File:Assembly.jpg]] | [[File:Assembly.jpg]] | ||
| − | Be sure the '''two''' gaskets are in place and not split. Any leakage past the gaskets will result in a less-than-normal discharge at the nozzles. | + | Be sure the '''two''' gaskets are in place and not split. Any leakage past the gaskets will result in a less-than-normal discharge at the nozzles. |
==Primary or secondary== | ==Primary or secondary== | ||
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==Resources== | ==Resources== | ||
| − | *Holley's accelerator pump instructions are on [http://www.holley.com/data/Products/Technical/199R8108-2.pdf pages 6 and 7] | + | *[[Media:HolleyCarbList.pdf|Aftermarket Holley carb numerical listing]] by carb number |
| + | *[[Holley HP series carb specs]] by carb number | ||
| + | *Holley's accelerator pump instructions are on [http://www.holley.com/data/Products/Technical/199R8108-2.pdf pages 6 and 7] | ||
*[http://www.holley.com/TechService/Instructions.asp Holley instruction manuals by part number] | *[http://www.holley.com/TechService/Instructions.asp Holley instruction manuals by part number] | ||
*[http://www.holley.com/data/Products/Technical/199R10014.pdf Manual, Exploded View and Nomenclature]for Holley models 2010, 2300, 4010, 4011, 4150, 4160, 4165, 4175, and 4500 | *[http://www.holley.com/data/Products/Technical/199R10014.pdf Manual, Exploded View and Nomenclature]for Holley models 2010, 2300, 4010, 4011, 4150, 4160, 4165, 4175, and 4500 | ||
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