Pages 4–8 (5 pages)

Operation: Fuel Metering Systems

From the 1956 Holley Model 4000 Carburetor Service Manual Supplement (C-228-1)

Year
1956
Make
Ford, Holley, Lincoln, Mercury
Vehicle
Carburetors, Components and Systems, Passenger Cars, Thunderbird
Type
Service Manual, Supplement
Models
Holley Model 4000 four-barrel downdraft; 1956 Lincoln, Mercury, Ford Thunderbird and police cars
Publication
Form N C-228-1 (Supplement to C-228)
Pages
18

Describes the fuel inlet system with its new ball-point needle valve, the main metering system with the redesigned discharge nozzle assembly and venturi transfer tubes, the idle system with permanent restrictions replacing removable idle tubes, the vacuum-operated power enrichment system and the secondary system. Cutaway drawings label the float, main jet, idle needle, economizer diaphragm and secondary diaphragm.

What this section covers

  • Fuel inlet system and ball-point needle valve
  • Main metering system and discharge nozzle
  • Idle system
  • Power enrichment system
  • Secondary system
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