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Thread: if you had no carb and had a choice between

  1. #1
    Junior Member APPRENTICE
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    May 2005
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    if you had no carb and had a choice between

    1050 holley 850 demon and 850 proform gas carb to be run a 440 blueprinted but 10:50 flat tappet 600 lift 308 duration. which would you chose please base answer on your own experience using these carbs in a similar applications.

  2. #2
    Senior Member DYNO OPERATOR
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    Apr 2008
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    504

    Carb choice

    The 1050 holley is the best choice or the three you sited. The boosters have a far better signal curve than any thing that Barry grant offers period. This curve is necessary for the enrichment required at high speed and enough signal to meter at low air demands. The larger the booster the more it hurts air flow, but the stronger the signal. The signal strength derived by annular boosters is an obstruction to high speed air flow at the top. The older boosters like on the 850 holley and the old 1050 holley used are called bar boosters, at worst have a better signal curve than the best annular booster available today. If you want the best first choice try to find a holley with bar boosters. They don't have skirts like it sounds. If you would like an expert on this subject you should google Norm, He designed all of Dave Brasswells carbs back in the 80's with these boosters that I have refered to. He is the best and HONEST two qualitys that seldom cross paths. His site can be found by typing Competition Fuel Systems Tuscon arizona. Good luck hunting and happy new year.javascript:emoticon('')

  3. #3
    Senior Member RACING JUNKIE fla1976's Avatar
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    Carb


  4. #4
    just my 2 cents from experience the demons are junk never will i own another

  5. #5
    Senior Member DYNO OPERATOR
    Join Date
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    Re: Carb choice

    Quote Originally Posted by TopspeedLowet
    The 1050 holley is the best choice or the three you sited. The boosters have a far better signal curve than any thing that Barry grant offers period. This curve is necessary for the enrichment required at high speed and enough signal to meter at low air demands. The larger the booster the more it hurts air flow, but the stronger the signal. The signal strength derived by annular boosters is an obstruction to high speed air flow at the top. The older boosters like on the 850 holley and the old 1050 holley used are called bar boosters, at worst have a better signal curve than the best annular booster available today. If you want the best first choice try to find a holley with bar boosters. They don't have skirts like it sounds. If you would like an expert on this subject you should google Norm, He designed all of Dave Brasswells carbs back in the 80's with these boosters that I have refered to. He is the best and HONEST two qualitys that seldom cross paths. His site can be found by typing Competition Fuel Systems Tuscon arizona. Good luck hunting and happy new year.javascript:emoticon('')
    The bitterness of low quality remains long after the sweetness of low price is forgotten.

  6. #6
    Senior Member RACING JUNKIE mopar1968's Avatar
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    I run both big blocks and small blocks, i would run the proform 850, have had better luck with a 850, you can always jet to engine, just don't overkill, Mopars doesn't like alot of fuel if you don't have the engine to run it!!!





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  7. #7
    Senior Member RACING JUNKIE jmarksdragster's Avatar
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    I always look for the biggest carb within reason, my choice for a 440 would be the Dominator. However, there are a lot of versions out there, some Dominators require a little extra work. With a few simple metering changes an HP 8082 2-circuit would be my choice.
    Mark Whitener
    http://racingfuelsystems.myfunforum.org
    __________

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

  8. #8
    Please do yourself a favor and call Pro Systems Carburators (727)490-6717. Ask for Patrick, tell him The Undertaker sent you. You will not be sorry...


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