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Thread: Demon 850 CFM Mechanical Secondaries Double Pumper Carburetor Model SDA-850-MS

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    KEPSTANG's Avatar
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    Demon 850 CFM Mechanical Secondaries Double Pumper Carburetor Model SDA-850-MS

    Demon 850 CFM Mechanical Secondaries Double Pumper Carburetor Model SDA-850-MS Screamin Demon

    I have several of these carburetors and are new in the box as shipped by Holley. Pictures are of one of the carburetors not being sold and are to show actual contents. Accessory bag with instructions will be checked prior to shipping to verify contents. The carburetor will not be disturbed.
    Contents include the carburetor, base and air cleaner gasket, Instructions, stickers, kick down linkage as well as linkage options for a less or more aggressive secondary opening ratio.

    If you don’t see it in the pictures, do not assume that it is included.

    I probably should not have to say this due to the nature of high performance engine components…… BUT this carburetor could run perfect out of the box for your application or not. As with all carburetors, your specific engine combination combined with a given automotive drivetrain or marine (Prop/Jet) drive may require tuning. But you knew this ………………. The instructions are a good place to start and Holley’s tech department as well as other knowledgeable resources are available.

    Barrels 4
    Booster Down Leg
    Brand Demon
    CFM 850
    Choke None
    Circuit 2
    Emission Code 3
    Finish Shiny
    Fuel Gasoline
    Fuel Inlet Dual
    Fuel System Carbureted
    High Speed Air Bleed 33
    Idle Air Bleed Size 70
    Material Aluminum
    Model Screamin Demon
    Primary Main Jet 82
    Primary Power Valve 4.5
    Primary Pump Nozzle Size 33;33
    Product Type Carburetor
    Secondaries Mechanical
    Secondary Main Jet 93
    Supercharged Application No
    Throttle Bore 1.75 inch

    $450.00 Each
    Call or text 205-919-7345
    Attached Thumbnails Attached Thumbnails IMG_6511.jpg   IMG_6510.jpg   IMG_6505.jpg   IMG_6506.jpg   IMG_6507.jpg  

    IMG_6508.jpg   IMG_6509.jpg  

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    Team Dirt Bag Intern NUTTZ
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    Re: Demon 850 CFM Mechanical Secondaries Double Pumper Carburetor Model SDA-850-MS

    Damn, pretty good deal!
    Heavy Lake Lay Up Family Boat Ready To Race Any Takers

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    Re: Demon 850 CFM Mechanical Secondaries Double Pumper Carburetor Model SDA-850-MS

    Holley had these on sale for $225 each back in May. Free shipping too. Mine is waiting for me to install it on the Carlson
    FIVE HUNDRED AND FORTY FIVE CUBIC INCHES BABY
    I
    t's a budget build, the grocery budget.

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    Re: Demon 850 CFM Mechanical Secondaries Double Pumper Carburetor Model SDA-850-MS

    Hey Rich, make sure to install a zinc anode on the party boat so the aluminum doesn't corrode from electrolosis! Good score
    Heavy Lake Lay Up Family Boat Ready To Race Any Takers

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    Re: Demon 850 CFM Mechanical Secondaries Double Pumper Carburetor Model SDA-850-MS

    Wow! $225 was a steal! They were like $529 on Jegs, then wet to like $555.

  8. #6
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    Re: Demon 850 CFM Mechanical Secondaries Double Pumper Carburetor Model SDA-850-MS

    Got two left. $425.00 Shipped....................

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