Traction advice

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  • Matt49
    Senior Member
    • Jun 2007
    • 3123

    #16
    I think VCoG in general is one of the most overlooked things in car setups. Its pretty dang important and most people don't give it much thought.

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    • Egoracing
      Senior Member
      • May 2007
      • 4852

      #17
      Billet, Do you look at the car as 3 sections? I had someone YEARS ago, that really taught me a lot and he won a bunch of races, said you have to look at the cars centerline (He was referring to weight and to COG) in 3 separate sections. #1 Engine area, #2 Drivers area, #3 Rear Section. He said to really understand the cars it made it easier to predict what was going to happen by making changes to any of the locations. He proved part of his theory when an asphalt series went to perimeter chassis and he showed me how it was going to change the car, then went out and won the next 3 races without an issue while some top teams struggled with the change.

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      • lovin dirt
        Member
        • Dec 2008
        • 74

        #18
        Sorry to show my ignorance, but how do you determine you COG.
        Thanks, Mike

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        • let-r-eat
          Senior Member
          • May 2007
          • 2319

          #19
          The COG is usually around camshaft height give or take depending on combination. The COG of the engine is the axis in which the engine would spin in balance if it were on a rotisserie. Same with the car or any object for that matter.Center of horizontal balance might be a better visual term.
          BUCKLE UP NOW, YA HEAR?

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          • 7uptruckracer
            Senior Member
            • May 2009
            • 1336

            #20
            There is a way to check it with scales and some blocks or a jack, It can be dangerous. But you take your ride height weights jack the back up super high like 18 or 24 inches I don't remember and notate some changes and plug them in to a formula and that gives it to you I'll look it up later at home or someone else who remembers off the top of their head better then me post it.

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            • Len72P
              Member
              • Sep 2008
              • 44

              #21
              Check out Longacre tech articals. Gives a method to check COG chassis. I have done it along with a second method from the internet and they both came out very close. My BW late model with steel block alum heads came out at 19.25 inchs.

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              • Len72P
                Member
                • Sep 2008
                • 44

                #22
                Here's the other one I used , Rob Robinette's C of G Height Calculator. They both came out close to same , within a 1/2 inch.

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