Lead on LR tube

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  • rakracing
    Senior Member
    • Dec 2014
    • 218

    #76
    Grt62, that's exactly what he said is next tungsten birdcages

    Comment

    • twisterf5
      Senior Member
      • May 2012
      • 334

      #77
      this is not the class i run but i do run a 4 bar car QC rear end. i made this post here because i thought i would get the best info on this set up and it sure did. our series we run has no rule on this now but will be banned next year. i did not wont to be the guy that his lead came off and hurt some one. so i made some lead donuts to go in the tube only bad part is not something you can take out at the track. but felt it was safer.

      Comment

      • manwplan
        Senior Member
        • Jul 2007
        • 351

        #78
        Originally posted by twisterf5 View Post
        this is not the class i run but i do run a 4 bar car QC rear end. i made this post here because i thought i would get the best info on this set up and it sure did. our series we run has no rule on this now but will be banned next year. i did not wont to be the guy that his lead came off and hurt some one. so i made some lead donuts to go in the tube only bad part is not something you can take out at the track. but felt it was safer.
        I can not state enough that if you think lead is dangerous on the axle tube then it is dangerous anywhere else on the car. If you mount lead properly it won't fall off. Where anyone got the idea that lead can only fall off when mounted to the axle tube is beyond me.

        Comment

        • zeroracing
          Senior Member
          • May 2007
          • 1014

          #79
          ^^^^ agree 100%, if you can't safely mount it to something like an axle tube you can't safely mount it any where In the car

          Comment

          • sidewinder69
            Member
            • Sep 2016
            • 95

            #80
            Would it be beneficial to run steel cage and steel axle tube on right side as well?

            Comment

            • Renegade Cust Susp
              Senior Member
              • Dec 2008
              • 349

              #81
              Would think you would add unsprung rear %. So it wouldn't add static LR, and may help overall drive instead of just driving LR more...
              Broc Burton
              go.fast.crs@gmail.com

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              • Krooser
                Senior Member
                • Nov 2012
                • 3117

                #82
                Member of the Luxemburg Speedway Hall of Fame
                Class of 2019

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                • MasterSbilt_Racer
                  Senior Member
                  • May 2007
                  • 14324

                  #83
                  I think that was at PRI 2015.
                  Modern Day Spec Wedge Racing

                  Comment

                  • billetbirdcage
                    Senior Member
                    • May 2007
                    • 2020

                    #84
                    Originally posted by MasterSbilt_Racer View Post
                    I think that was at PRI 2015.
                    Yes it was, many just didn't see it or know what it was for because it was on a rear end in the booth but didn't have anything attached to the clamp.

                    Comment

                    • Cranky
                      Senior Member
                      • Sep 2014
                      • 174

                      #85
                      Weight

                      So are you guys just using this weight on the rear to calculate the bite numbers as well or are you countering it with weight on the RR frame to keep bite numbers to a minimum?

                      Comment

                      • Ltemodel
                        Senior Member
                        • Jun 2007
                        • 307

                        #86
                        I think the lead on the LR tube has to do more with axle limiting and traction.

                        If you run a chain or a shock on the front of the LR to limit the height, at one point the chain will snap and pull traction out of the LR. Once the tire starts to spin, it blows up like a dragster tire leaving the line.

                        Once the tire grows and the stretch leaves, the tire looses traction. Putting a ton of lead on the tube will keep traction in the car even when it limits out on the chain.

                        The sprung weight can still move around and transfer the same around the car, but the LR tire always stays connected.
                        Last edited by Ltemodel; 01-02-2017, 05:59 AM. Reason: Should be sprung weight, oops
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                        • RW57
                          Senior Member
                          • Dec 2007
                          • 662

                          #87
                          Talked to friend of mine this week also a track promoter said racern at his track picked up a new car not gonna say brand just not a major player yet but rapidly getting there . Car had steel LR axle tube steel birdcage on LR. Also had hub filled with some kind of heavy expensive metal also LR brake rotor had more of same heavy metal inserted into cooling fins on LR.

                          Comment

                          • MasterSbilt_Racer
                            Senior Member
                            • May 2007
                            • 14324

                            #88
                            Originally posted by RW57 View Post
                            Talked to friend of mine this week also a track promoter said racern at his track picked up a new car not gonna say brand just not a major player yet but rapidly getting there . Car had steel LR axle tube steel birdcage on LR. Also had hub filled with some kind of heavy expensive metal also LR brake rotor had more of same heavy metal inserted into cooling fins on LR.
                            You know how racers think. 25# made me pick up a tenth. 250# and I lap the field. Lol
                            Modern Day Spec Wedge Racing

                            Comment

                            • Krooser
                              Senior Member
                              • Nov 2012
                              • 3117

                              #89
                              Using that reasoning MBR I should be able to strap my butt to the axle and win Daytona with a street stock.....
                              Member of the Luxemburg Speedway Hall of Fame
                              Class of 2019

                              Comment

                              • MasterSbilt_Racer
                                Senior Member
                                • May 2007
                                • 14324

                                #90
                                Originally posted by Krooser View Post
                                Using that reasoning MBR I should be able to strap my butt to the axle and win Daytona with a street stock.....
                                The other guys are racing street stocks too! lol
                                Modern Day Spec Wedge Racing

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