Choosing a carburetor
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4776, 4777, 4778, 4779, 4780, 4781 - These are the traditional "double pumpers". Ranging from 600 cfm to 850 cfm, they are a mainstay of racing and hot street engines. If matched correctly to their application they can be used on the street but economy will not be as good as a vacuum secondary carb similarly chosen. These are 1850 type carbs, having both a primary and secondary metering block and accelerator pumps on both the primary and secondary sides of the carb. | 4776, 4777, 4778, 4779, 4780, 4781 - These are the traditional "double pumpers". Ranging from 600 cfm to 850 cfm, they are a mainstay of racing and hot street engines. If matched correctly to their application they can be used on the street but economy will not be as good as a vacuum secondary carb similarly chosen. These are 1850 type carbs, having both a primary and secondary metering block and accelerator pumps on both the primary and secondary sides of the carb. | ||
| − | BTW, the 4160 is a vacuum secondary carb- w/one | + | BTW, the model 4160 is a vacuum secondary carb- w/few exceptions, one is the 0-4224 660 cfm "center squirter" carb, originally designed to fit on a dual four barrel intake end-to-end. Another is the 450 cfm 0-9776 Model 4160 mechanical secondary carb. It has no secondary accelerator pump. These carbs are designed to be used in a multiple carb application. They have no choke flap, they have side hung float bowls and single fuel inlet. The model 4150 can be either a vacuum secondary or a double pumper carb. |
4604 - This is one of the Holley 3-barrel carbs rated at 1050 cfm. The 3 barrel Holley was originally designed for NASCAR stock car racing and was used on the 426 Hemi in 1964. It preceded the Dominator and offered in several versions. It never really hit its stride, suffering from issues below WOT because of the less-than-ideal secondary venturi shape (and booster style in the 1050 cfm version). It was made basically from a Holley 850 w/the center taken out of the secondaries. It used an oversize secondary vacuum diaphragm housing (which the diaphragms are no longer available for) and an early version of the "cathedral" center hung float bowls made famous later, on the Dominator. A carb kit for a 850 can be used w/some modification to rebuild them. Today it has a following among collectors and some actually still use them. They can fetch high prices for good examples. | 4604 - This is one of the Holley 3-barrel carbs rated at 1050 cfm. The 3 barrel Holley was originally designed for NASCAR stock car racing and was used on the 426 Hemi in 1964. It preceded the Dominator and offered in several versions. It never really hit its stride, suffering from issues below WOT because of the less-than-ideal secondary venturi shape (and booster style in the 1050 cfm version). It was made basically from a Holley 850 w/the center taken out of the secondaries. It used an oversize secondary vacuum diaphragm housing (which the diaphragms are no longer available for) and an early version of the "cathedral" center hung float bowls made famous later, on the Dominator. A carb kit for a 850 can be used w/some modification to rebuild them. Today it has a following among collectors and some actually still use them. They can fetch high prices for good examples. | ||
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