Holley - Mechanical Secondary Square Bore

Double Pumpers are usually used for Drag Racing and other forms of Competition. Greater care must be taken for “size selection” with a double pumper. Under full acceleration, double pumper, mechanical secondary carbs, initially depend only on the accelerator pumps to provide adequate fuel, until enough air flow can be established to begin pulling in the main system. The larger the carb, the higher the airflow required to accomplish this. If the carb is too large, the pump shot will be consumed before the main system starts. The result is a “bog”. Remember, too much fuel will cause “cylinder bore wash” and can cause serious damage to your engine.


 

Holley 600 cfm 4 barrel 4150 Carburetor

Holley - Mechanical Secondary Square Bore - Holley 600 cfm 4 barrel 4150 Carburetor
Features;Mechanical secondaries,MECHANICAL choke ,dual inlet fuel bowls,power valve protection.Primary jet 66 ,secondary jet 73,power valve 6.5.Primary pump nozzle .028 ”,secondary pump nozzle .032 ”.Centre hung floats.Has a ”polished,shiny appearance”, [when shiny runs out we will be using the old Holley “Classic Dichromate ” finish ].Jets relate to 0-4776-7 list number.Rebuild kit is- QJ123060.
PP-QJ12920 Double Pumper-Mechanical Secondary
£465.08

 

Holley 650 cfm 4 barrel 4150 Carburetor

Holley - Mechanical Secondary Square Bore - Holley 650 cfm 4 barrel 4150 Carburetor
Features;Mechanical secondaries,MECHANICAL choke ,dual inlet fuel bowls,power valve protection.Primary jet 67 ,secondary jet 73,power valve 6.5.Primary pump nozzle .028 ”,secondary pump nozzle .028 ”.Centre hung floats.Has a ”polished,shiny appearance”, [when shiny runs out we will be using the old Holley “Classic Dichromate ” finish ].Jets relate to 0-4777-7 list number.Rebuild kit is- QJ123060.
PP-QJ12930 Double Pumper-Mechanical Secondary
£490.69

 

Holley 700 cfm 4 barrel 4150 Carburetor

Holley - Mechanical Secondary Square Bore - Holley 700 cfm 4 barrel 4150 Carburetor
Features;Mechanical secondaries,MECHANICAL choke ,dual inlet fuel bowls,power valve protection.Primary jet 69 ,secondary jet 78,power valve 6.5.Primary pump nozzle .028 ”,secondary pump nozzle .031 ”.Centre hung floats.Has the old Holley “Classic Dichromate ” finish..Jets relate to 0-4778-7 list number.Rebuild kit is-QJ123060.
PP-QJ141255 Double Pumper-Mechanical Secondary
£486.48

 

Holley 750 cfm 4 barrel 4150 Carburetor

Holley - Mechanical Secondary Square Bore - Holley 750 cfm 4 barrel 4150 Carburetor
Features;Mechanical secondaries,MECHANICAL choke ,dual inlet fuel bowls,power valve protection.Primary jet 71 ,secondary jet 80,power valve 6.5.Primary pump nozzle .028 ”,secondary pump nozzle .031 ”.Centre hung floats.Has the old Holley “Classic Dichromate ” finish..Jets relate to 0-4779-9 list number.Rebuild kit is-QJ123060.
PP-QJ129305 Double Pumper-Mechanical Secondary
£528.71

 

Holley 800 cfm 4 barrel 4150 Carburetor

Holley - Mechanical Secondary Square Bore - Holley 800 cfm 4 barrel 4150 Carburetor
Features;Mechanical secondaries,MECHANICAL choke ,dual inlet fuel bowls,power valve protection.Primary jet 71 ,secondary jet 85,power valve 6.5.Primary pump nozzle .031 ”,secondary pump nozzle .031 ”.Centre hung floats.Has the old Holley “Classic Dichromate ” finish ].Jets relate to 0-4780-7 list number.Rebuild kit is-QJ123060.
PP-QJ129310 Double Pumper-Mechanical Secondary
£516.18

 

Holley 850 cfm 4 barrel 4150 Carburetor

Holley - Mechanical Secondary Square Bore - Holley 850 cfm 4 barrel 4150 Carburetor
Features;Mechanical secondaries,MECHANICAL choke ,dual inlet fuel bowls,power valve protection.Primary jet 80 ,secondary jet 78,secondary power valve 6.5.Primary pump nozzle .031 ”,secondary pump nozzle .031 ”.Centre hung floats.Has the old Holley “Classic Dichromate ” finish..Jets relate to 0-4781-8 list number.Rebuild kit is-QJ123060.
PP-QJ129315 Double Pumper-Mechanical Secondary
£559.62

 

Holley 650 cfm 4 barrel 4150 RACE HP Carburetor

Holley - Mechanical Secondary Square Bore - Holley 650 cfm 4 barrel 4150 RACE HP Carburetor
Features;Progressive mechanical secondaries,NO choke ,“Either side ”,dual inlet fuel bowls,straight leg boosters,double 30cc accelerator pumps,power valve protection.Primary jet 70 ,secondary jet 70,power valve 6.5.Primary pump nozzle .028 ”,secondary pump nozzle .029 ”.Centre hung floats.Classic Holley Dichromate finish.Jets relate to 0-80541-1 list number.Rebuild kit is-QJ141405.
PP-QJ140965 4150 HP-Race-Mechanical Secondary
£819.30

 

Holley 750 cfm 4 barrel 4150 RACE HP Carburetor

Holley - Mechanical Secondary Square Bore - Holley 750 cfm 4 barrel 4150 RACE HP Carburetor
Features;Progressive mechanical secondaries,NO choke ,“Either side ”,dual inlet fuel bowls,down leg boosters,double 30cc accelerator pumps,power valve protection.Primary jet 73 ,secondary jet 73,secondary power valve 6.5.Primary pump nozzle .031 ”,secondary pump nozzle .031 ”.Centre hung floats.Classic Holley Dichromate finish.Jets relate to 0-80528-1 list number.Rebuild kit is-QJ141405.
PP-QJ140945 4150 HP-Race-Mechanical Secondary
£889.93

 

Holley 750 cfm 4 barrel 4150 RACE HP Carburetor

Holley - Mechanical Secondary Square Bore - Holley 750 cfm 4 barrel 4150 RACE HP Carburetor
Features;Vacuum secondaries,NO choke ,“Either side ”,dual inlet fuel bowls,power valve protection.Primary jet 72 ,secondary jet 84, secondary power valve 6.5 [some models ].Primary pump nozzle .031 ”,brown secondary spring,quick change secondary chamber lid, centre hung floats.Classic Holley Dichromate finish.Jets relate to 0-80529-1 list number.Rebuild kit is-QJ141405.
PP-QJ140950 4150 HP-Race-Vacuum Secondary
£923.08

 

Holley 950 cfm 4 barrel 4150 RACE HP Carburetor

Holley - Mechanical Secondary Square Bore - Holley 950 cfm 4 barrel 4150 RACE HP Carburetor
Features;Progressive mechanical secondaries,NO choke ,“Either side ”,dual inlet fuel bowls,double-step down leg boosters,double 30cc accelerator pumps,power valve protection.Primary jet 78 ,secondary jet 78,primary &secondary power valve s6.5.Primary &secondary pump nozzles .031 ”.Centre hung floats.Classic Holley Dichromate finish.Jets relate to 0-80496-1 list number.Rebuild kit is-QJ141405.
PP-QJ140880 4150 HP-Race-Mechanical Secondary
£913.03

 

Holley 1000 cfm 4 barrel 4150 RACE HP Carburetor

Holley - Mechanical Secondary Square Bore - Holley 1000 cfm 4 barrel 4150 RACE HP Carburetor
Features;Progressive mechanical secondaries,NO choke ,“Either side ”,dual inlet fuel bowls,double-step down leg boosters,double-30cc primary,50cc secondary accelerator pumps,power valve protection.Primary jet 84,secondary jet 84,6.5 secondary power valve.Primary pump nozzle .031 ”,secondary pump nozzle .036 ”.Centre hung floats.Classic Holley Dichromate finish.Jets relate to 0-80513-1 list number.Rebuild kit is-QJ141405.
PP-QJ141520 4150 HP-Race-Mechanical Secondary
£854.81

 

Holley - Mechanical Secondary Square Bore - Holley 600 cfm 4 barrel 4150 Carburetor Holley - Mechanical Secondary Square Bore - Holley 650 cfm 4 barrel 4150 Carburetor Holley - Mechanical Secondary Square Bore - Holley 700 cfm 4 barrel 4150 Carburetor Holley - Mechanical Secondary Square Bore - Holley 750 cfm 4 barrel 4150 Carburetor Holley - Mechanical Secondary Square Bore - Holley 800 cfm 4 barrel 4150 Carburetor