How to rebuild automotive carburetors
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Often the best place to start is to baseline the carb back to factory specs. This eliminates any chance that a previous owner's changes will mess up the way the carb works on your engine. | Often the best place to start is to baseline the carb back to factory specs. This eliminates any chance that a previous owner's changes will mess up the way the carb works on your engine. | ||
| − | [ | + | [[Media:HolleyCarbList.pdf|'''Aftermarket Holley carb numerical listing''']] by carb number shows the factory specs as well as the part numbers for rebuild kits and gaskets. To compare metering plates to jet sizes, see the info [[Media:08 Holley Catalog pages - 90.pdf|'''here''']]. |
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The seat can be re formed by using an old check ball and a small punch. Drop the check ball into the check ball passage, then with the vacuum chamber solidly supported, lightly tap the old check ball with the punch and a small hammer. This re forms the seat. | The seat can be re formed by using an old check ball and a small punch. Drop the check ball into the check ball passage, then with the vacuum chamber solidly supported, lightly tap the old check ball with the punch and a small hammer. This re forms the seat. | ||
| − | '''NOTE:''' There are small | + | '''NOTE:''' There are small grooves in the vacuum chamber check ball seat. This is normal, so do not try to use this method to remove the grooves. They need to be there to allow the secondaries to work correctly. |
A tuning trick is to use a deeper or shallower groove to change the opening rate. A tool can be made from a modified phillips head screwdriver to cut deeper and/or more grooves in the seat. Also, a lighter (aluminum) check ball can be used. | A tuning trick is to use a deeper or shallower groove to change the opening rate. A tool can be made from a modified phillips head screwdriver to cut deeper and/or more grooves in the seat. Also, a lighter (aluminum) check ball can be used. | ||
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