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Thread: Which Dominator to choose

  1. #1
    Junior Member SHOW GUEST
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    Which Dominator to choose

    I'm trying to figure which Dominator would work best, 2 or 3 circuit.
    I've heard all the technical mumbo jumbo, and it clears up nothing.
    Now it has a very old Holley Dominator and we know we need to upgrade to a newer model. Last Sat we tested and ran a 9:96 @ 138 leaving gently from idle.
    motor is 496, alum heads, Team G, trans brake, 5400 stall, 4:56 gear,
    33X15 tire.
    We'd like to switch to a Quickfuel, but that is probably not in the budget, since now were probably going to have to strap a chute to this thing.
    So which Holley would everyone recommend, 2 or 3 circuit?
    Thanks
    Mike

  2. #2
    Senior Member DYNO OPERATOR
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    Which

    Mike

    I sent you a Private Message.

    Look at the top of the page and find NEW MESSAGES and click on that.

  3. #3
    Senior Member DYNO OPERATOR
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    Which

    3 circuits are for tunnel ram intakes with big plenums.

    2 circuits are for throttle stop classes.

    Most everything else uses a 3 circuit, trying to lean out the intermediate toward a 2 circuit.

    Buy the 3 circuit and try it. Then increase the intermediate air bleed until it slows down, then increase the main jet and see if it goes faster.

    Or buy a custom carb for your application from name brand builder.

    Or buy a used name brand carb for a lot less.

    Is that any better?

  4. #4
    Junior Member SHOW GUEST
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    Thanks Mark I picked up a 2 yr old used 3 circuit locally. Didn't bolt it on yet, but will test it over the next few days

  5. #5
    Senior Member RACING JUNKIE jmarksdragster's Avatar
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    Florida
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    Older Dominators can be made to run quite well. And I am partial to a 2 circuit for almost any application. I have run a 2 circuit setup on a 2.25 throttle blade 2.050 venturi carb that flows about 1740 CFM on my small block with no need for an intemediate circuit. A local guy here runs two 2 circuit 1050's on a 600+" engine that runs 4.40's in a dragster in the 1/8. The 3rd or intermediate circuit was designed for IR intakes where cylinder pulsing is not dampened by a plenum, these pulses can disrupt the flow from the boosters at low speeds. 4 and 6 cylinder engines may benefit as well because the pulses are stronger even with a plenum.

    What model number is the old Dominator, and the model number on the newer one?

    Mark Whitener
    http://racingfuelsystems.myfunforum.org
    __________

    Good work isn't cheap, and cheap work can't be good.

  6. #6
    Senior Member DYNO OPERATOR
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    Which

    Mark W. , I was hoping you would chime in after what I posted, to clear up the 3 circuit question.

  7. #7
    Senior Member RACING JUNKIE
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    2 circuit 1150, with qf or some other good metering blocks.

  8. #8
    Senior Member RACING JUNKIE TheRabbit's Avatar
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    Augusta, Ga.
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    Mark I've run 2 different BLP's and had really good success with them.
    I don't have the invoice, but do have the build sheet for the carb that was on my old 548.
    Model # 40365DL
    Ser# 13699

    The Big Bo looks pretty sweet. Some of our Pro Stock guys run it. It's a good carb for our Pro Stock class because we only allow a single carb or 1 split carb. The carburetor use to be limiting factor, but now there are several single 4 barrel carbs (or big 1 barrels like the Big Bo). that can support 1,400+ hp


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