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Thread: 2 Vs. 3 Circuit Dominator

  1. #1
    Junior Member APPRENTICE
    Join Date
    Nov 2006
    Posts
    13

    2 Vs. 3 Circuit Dominator

    Guys,

    Im wondering what experiences people have had with 2 and 3 circuit dominators. I drag race an 800 hp 540 in a 3200 pound car. Ive been running a 3 circuit 1250 but am looking at a used 1150 - 2 circuit (part #7320). Any thoughts would be great.

  2. #2
    Senior Member RACING JUNKIE jmarksdragster's Avatar
    Join Date
    Jul 2007
    Location
    Florida
    Posts
    635
    http://www.motorsportsvillage.com/fo...pic.php?t=3742
    Just converted a 1250, still a little lean (ran out of jets) but still made more than a 1050 on the dyno.
    Mark Whitener
    http://racingfuelsystems.myfunforum.org
    __________

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

  3. #3
    Senior Member EXPERT BUILDER
    Join Date
    Jan 2005
    Posts
    336
    im not a carb guru,but my 3 circuit runs rich even after buying the complete assortment of air bleeds.i bought a aem air to fuel ratio gage to monitor.ive heard the three circuit is main advantage is transbraked vehicles at the track.

    if your gonna be driving on street ive heard 2 circuits are better.

    if your gonna be racing primarily then 3 circuit.

    if no racing at all and want to get easiest carb on the streets get a 4150 series,they make em up to i believe 1000 cfm.

    good luck russ

  4. #4
    Member JUNIOR BUILDER
    Join Date
    Jul 2003
    Location
    U.S.A.
    Posts
    80
    The 3 circuit carbs are all real rich at part throttle. The only way around it is to either Block the 3rd circuit or drill and tap it and make your own " jets " or restrictions using a 10-32 set screw.

    I've blocked the 3rd circuit and added a restriction to the idle transfer slot on 2 # 9375 Carbs and both performed MUCH better after the mods. One of them was used on 3 differant engines.

    There wasnt much if any change in ET, but idle quality was much improved and during part throttle operation there was a HUGE difference.

    No More Blackend Spark Plugs.


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