World war 2

What Jets are in a Holley 750 double pumper?

Alex Dopico

What Jets are in a Holley 750 double pumper?

4779 (-4 -5) 750cfm. Primary Main Jets 70. Secondary Main Jets 80.

  • 4779 (-6 -7 -8 -9) 750cfm. Primary Main Jets 71. Secondary Main Jets 80.
  • 4780, (-1) 800cfm. Primary Main Jets 72. Secondary main jets 76.
  • 4780-2 800cfm. Primary Main Jets 70.
  • 4780 (-3 -4 -5 -6 -7) 800cfm. Primary main jets 71.
  • 4781 850cfm. Primary Main Jets 80,

    • What size jets are in a Holley 600 double pumper?

    Features:

    Barrels 4
    Model 4150
    Primary Main Jet 66
    Primary Power Valve 6.5
    Primary Pump Nozzle Size 28

    What model number is a Holley 750 double pumper?

    Technical Details

    Manufacturer ‎Holley
    Model ‎Holley 750 Ultra Double Pumper W/Blue Billet
    Item Weight ‎9.4 pounds
    Item model number ‎0-76750BL
    Is Discontinued By Manufacturer ‎No

    What size jets are in a 850 Holley?

    Features:

    Barrels 4
    Model 4150
    Primary Main Jet 80
    Primary Power Valve 4.5
    Primary Pump Nozzle Size 28

    Do Holley main jets affect idle?

    As far as jetting goes, the jet size will not affect idle, as the jets don’t come into play until the carb transitions to the primary circuit, unless the throttle blades are open far enough to expose the transfer slot.

    What size jets are in a Holley 850 double pumper?

    Features:

    Barrels 4
    Model 4150
    Primary Main Jet 80
    Primary Power Valve 6.5
    Primary Pump Nozzle Size 31

    What size jets do I need?

    The suggested change in jet size is to go down one jet size for every 1,500 feet in density altitude you go up. Conversely, for every 1,500 feet you go down in density altitude, go up one jet size.