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Thread: CONVERTOR SIZE?

  1. #1
    Junior Member JOURNEYMAN
    Join Date
    Nov 2007
    Posts
    28

    CONVERTOR SIZE?

    Can someone tell me the benefits or drawbacks from a smaller 8in compared to a 10in convertor?

  2. #2
    Senior Member RACING JUNKIE jmarksdragster's Avatar
    Join Date
    Jul 2007
    Location
    Florida
    Posts
    635
    No drawback to either, each has it's place. A 10" can stall about 3500 to around 6000 depending on the engine, an 8" from about 5000 to over 7000 ( I have an 8" that stalls 7100). Vehicle weight, engine torque HP and RPM range, gear, tire size and trans type all play into the right one. Let me know what you plan to do with it and I can steer you in the right direction.
    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
    Aug 2005
    Location
    Tell City, IN
    Posts
    356
    I was told by a manufacture that my 9.5 don't have the effeciency as a smaller converter. He recommended an 8" Converter.
    Maybe it was a sales thing? maybe he know what he was talking about?..

  4. #4
    Senior Member RACING JUNKIE
    Join Date
    Sep 2007
    Posts
    4,143
    I would call Coan or another good converter manufacturer and tell them everything about your application and have one built to your needs.

  5. #5
    Senior Member RACING JUNKIE
    Join Date
    May 2003
    Location
    Coldwater, MI
    Posts
    2,998
    Quote Originally Posted by jmarksdragster
    No drawback to either, each has it's place. A 10" can stall about 3500 to around 6000 depending on the engine, an 8" from about 5000 to over 7000 ( I have an 8" that stalls 7100). Vehicle weight, engine torque HP and RPM range, gear, tire size and trans type all play into the right one. Let me know what you plan to do with it and I can steer you in the right direction.

    What he said, depends on combo mostly.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com


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