Chain on lr

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  • Illtsate32
    Senior Member
    • Jun 2015
    • 3079

    #1

    Chain on lr

    Ive been out of racing for a while a buddy has a bmod now back in the day we didnt run cars leaning on the rf like they do now so what is chained on the lr and for what purpose? And what is a ballpark length the chain should be? Thanks
  • MasterSbilt_Racer
    Senior Member
    • May 2007
    • 14303

    #2
    Originally posted by Illtsate32 View Post
    Ive been out of racing for a while a buddy has a bmod now back in the day we didnt run cars leaning on the rf like they do now so what is chained on the lr and for what purpose? And what is a ballpark length the chain should be? Thanks
    The car will keep jacking up on the LR until something stops it. You don't want that to be a shock. It is also nice to be able to adjust the travel. In comes the chain.

    Where to stop depends on your geometry. In general, limiting the top bar to somewhere in the 45 degree range is safe.
    Modern Day Spec Wedge Racing

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    • Illtsate32
      Senior Member
      • Jun 2015
      • 3079

      #3
      Originally posted by MasterSbilt_Racer View Post
      The car will keep jacking up on the LR until something stops it. You don't want that to be a shock. It is also nice to be able to adjust the travel. In comes the chain.Where to stop depends on your geometry. In general, limiting the top bar to somewhere in the 45 degree range is safe.
      Gotcha mastersbuilt..if you dont mind where abouts is the chain placed I guess where the chassis crosses over the rearend housing?

      Comment

      • MasterSbilt_Racer
        Senior Member
        • May 2007
        • 14303

        #4
        Originally posted by Illtsate32 View Post
        Gotcha mastersbuilt..if you dont mind where abouts is the chain placed I guess where the chassis crosses over the rearend housing?
        Different people have different opinions on that. You hook it on the chassis and the axle tube. The upper frame rail, straight down to the axle tube, is a common way to do it.
        Modern Day Spec Wedge Racing

        Comment

        • Illtsate32
          Senior Member
          • Jun 2015
          • 3079

          #5
          Ok thanks bud...

          Comment

          • hunterracing
            Senior Member
            • Jan 2009
            • 303

            #6
            Some say limit to 45 degrees but doesn't that change things how high or low the bar is at static ride height? So what would be good static ride height for bar to be at so you know where it needs stop at 45 to set chain?

            Comment

            • npoole37
              Member
              • Sep 2008
              • 39

              #7
              Would need to know bar length to answer that question. Shorter bars gain angle quicker than longer. The shorter the bar the less static angle needed to achieve 45 at a desired drop. A ballpark would be 4 inches of drop from ride height, and lock the chain tight there. A 16" bar would be around 24-26 degrees at static, and 45 at full drop at only 4". I personally run 5" of drop on a Shaw modified. Start at 21-23 degrees at static and at 5" of drop it hits 45. A 14" bar would need to be in the 18-20 degree range to achieve the same angle at full drop. Hopefully this helps answer your question.

              Comment

              • MasterSbilt_Racer
                Senior Member
                • May 2007
                • 14303

                #8
                Originally posted by npoole37 View Post
                Would need to know bar length to answer that question. Shorter bars gain angle quicker than longer. The shorter the bar the less static angle needed to achieve 45 at a desired drop. A ballpark would be 4 inches of drop from ride height, and lock the chain tight there. A 16" bar would be around 24-26 degrees at static, and 45 at full drop at only 4". I personally run 5" of drop on a Shaw modified. Start at 21-23 degrees at static and at 5" of drop it hits 45. A 14" bar would need to be in the 18-20 degree range to achieve the same angle at full drop. Hopefully this helps answer your question.
                Good reply. It all comes down to how much steer, LR loading, and about-to-rollover you can stand. You have to balance it all out in a package that works best for you. Of course you also have to avoid camming the cage over, breaking shock eyes off, and a laundry list of other things.
                Modern Day Spec Wedge Racing

                Comment

                • hunterracing
                  Senior Member
                  • Jan 2009
                  • 303

                  #9
                  Can someone measure steer by measuring wheel center to frame them jack up under seat and see how much it changes to know if you can go more drop or less? We are 17 15 bars.. so when u sit that do you raise it at track for more drive or just leave it there and never touch it and move lr bar for steer for slicker track?

                  Comment

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