Gear help

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  • Deish98
    Senior Member
    • Jan 2012
    • 238

    #1

    Gear help

    i have a ford 9inch rear end... What kind of gear would work on a one quarter race track high banked
  • kencar87
    Member
    • Oct 2011
    • 44

    #2
    more information

    we need more info as far as car type, size of motor and type, what division you run, type tire type of hp you think your motor has, just need more info and the answers will come in.

    Comment

    • Deish98
      Senior Member
      • Jan 2012
      • 238

      #3
      08 shaw modified with 383 chevy motor

      Comment

      • Dirtrunner35
        Senior Member
        • May 2010
        • 632

        #4
        Depends on how many rpm"s you want to run, 583 or more

        Comment

        • kencar87
          Member
          • Oct 2011
          • 44

          #5
          gear

          Now we got some information, first off I would say with your motor, decent hp, I would start out with a 630 to a 648-- 7500 to 7800 if less r use less gear, on a 406 I would start with a 620 and work up or down with that. 420-430 588 to 600 to 610 depends on condition of track . this is the type of gearing I have used in the past with these type motors on a good banked 1/4 mile track

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          • Deish98
            Senior Member
            • Jan 2012
            • 238

            #6
            most the time the track is slick

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            • oldtrackchamp4x
              Senior Member
              • Nov 2009
              • 270

              #7
              I would look at your engine torque curve with the cam you are using. It won't do you any good if you turn more rpms then your cam is good for, as it won't pull all the way up the straights. I run a 583 gear on a 1/4 banked track and only run 6800-7200 rpm, my racing buddies say my motor sounds like a Massey Ferguson tractor motor when i rev it up, but there has not been a time when their BIG rpm motors have gotten by me off the corner and up the straights. jmo.

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              • imca90
                Member
                • Jan 2012
                • 51

                #8
                What track

                Comment

                • kencar87
                  Member
                  • Oct 2011
                  • 44

                  #9
                  gear

                  old track champ has got it right, gear it for your rpm range per your cam. When I gave you those starting points it was based on the type cams I have been running over the years. you need to know just how far your motor will pull with out just making noise, if you run out of power before you get to the end of the shoot, to much gear, you want to still be pulling at the end and thats the sweet spot you want good luck, I am sure you will figure it out.

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                  • oldtrackchamp4x
                    Senior Member
                    • Nov 2009
                    • 270

                    #10
                    IMCA 90; Lovelock Speedway, Lovelock NV. Lovelockspeedway.com

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                    • Deish98
                      Senior Member
                      • Jan 2012
                      • 238

                      #11
                      thanks for all the imformation every1 and the track is Tri State Spedway

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