need more drive coming off...help please

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  • bluemod
    Senior Member
    • Aug 2011
    • 214

    #16
    After changing the shocks around the car rolls over alot to the right side never had that much roll. found another problem in the rr bars rrbb was trailing almost an inch. The rrtb was trailing 1/2inch. So i set both to trail a quarter of an inch. On a 1/2 mile high bank track should you have to have alot of trail to make the car turn?

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    • drtrkr244
      Banned
      • Dec 2007
      • 1024

      #17
      Thats a good starting point.Some car builders put lead in RF, some RR.

      An adjustment I recommend for my customers, for more drive, is lowering RTB.Generally, ur not off gas too long, so it doesnt affect the entry.

      Comment

      • JustAddDirt
        Senior Member
        • May 2007
        • 1893

        #18
        Originally posted by bluemod View Post
        After changing the shocks around the car rolls over alot to the right side never had that much roll. found another problem in the rr bars rrbb was trailing almost an inch. The rrtb was trailing 1/2inch. So i set both to trail a quarter of an inch. On a 1/2 mile high bank track should you have to have alot of trail to make the car turn?
        If you are on a small tighter 1/2 mile yes, but if you are on a bigger cornered track, I would say even up. You get more rear steer as the car gets up on the bars, and rolls over. Dont know if you need that extra 1/4" or not.
        Just have to feel it out and see.
        Also, How much stagger u typically run?
        I think there should be lifeguards in the genepool.

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        • bluemod
          Senior Member
          • Aug 2011
          • 214

          #19
          we have to run tires from the track and the most stagger i can get out of the g60s are 2in in the rear and 1/2 an inch in the front. I cant find g60-15 anywhere to buy but the track

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          • bluemod
            Senior Member
            • Aug 2011
            • 214

            #20
            we raced and the car was upside down. We swapped the shocks around on the front and shortened the rrbs a quater of an inch. The car pushed so hard is was bad it was like drivin a diffrent car than what i had.

            Comment

            • JustAddDirt
              Senior Member
              • May 2007
              • 1893

              #21
              Originally posted by bluemod View Post
              we raced and the car was upside down. We swapped the shocks around on the front and shortened the rrbs a quater of an inch. The car pushed so hard is was bad it was like drivin a diffrent car than what i had.
              So now you have too much drive?
              did u put the 1/4" lead back in it?
              Did u raise RRbottom bar 1 hole?
              lower rr top bar 1 hole?
              might need to even up springs in front. 2 750's
              That will loosen up entry and through middle as well.
              I think there should be lifeguards in the genepool.

              Comment

              • washeduptoo
                Senior Member
                • May 2007
                • 1353

                #22
                Are you squaring the rear end in the car or are you going by bar lengths to square, that might not work depending upon how it was built.

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                • oldtrackchamp4x
                  Senior Member
                  • Nov 2009
                  • 270

                  #23
                  Sounds to me like you are doing way to many things to the car at one time and now it's really off.I would put the car BACK to where it was when it was JUST loose on exit. Then just make ONE change at a time, like BITE or LLB or LUB. JMO

                  Comment

                  • bluemod
                    Senior Member
                    • Aug 2011
                    • 214

                    #24
                    We took out the 1/2in trail in the rr. Did not move any bars. And swaped the shocks around.
                    Put it on the scales after the race and we got

                    this is weight at each wheel

                    lf625 rf 456
                    lr 699 rr672

                    same springs in same location

                    left%54.4
                    cross%46.6
                    rear%55.3

                    stagger

                    lf 83in rf84in
                    lr83in rr85in

                    Car would not turn going in just strait to the wall no matter where at in the turn and this is a sweepin high bank track. To me the right front weight seems alot low. please all thoughts to help

                    Comment

                    • oldtrackchamp4x
                      Senior Member
                      • Nov 2009
                      • 270

                      #25
                      What were your scale numbers BEFORE you made any recent changes? From what you now have I feel your bite and cross are both low. I've never been on a high banked 1/2 mile, only 1/4- 3/10, so i might be talking out my rear, but I think you should raise your bite up to 70-80 lbs, which should loosen entry and tighten exit, but i would put the trail where it was, leave the shocks as they are now then scale then try the car. I'm assuming your ride heights are all correct and you are adjusting your weight jacks correctly to keep the heights the same. There are some way smart guys on here so i'm basically telling what has worked for me now and in the past. JMO Good Luck

                      Comment

                      • bluemod
                        Senior Member
                        • Aug 2011
                        • 214

                        #26
                        Originally posted by bluemod View Post
                        We took out the 1/2in trail in the rr. Did not move any bars. And swaped the shocks around.
                        Put it on the scales after the race and we got

                        this is weight at each wheel

                        lf625 rf 456
                        lr 699 rr672

                        same springs in same location

                        left%54.4
                        cross%46.6
                        rear%55.3

                        stagger

                        lf 83in rf84in
                        lr83in rr85in

                        Car would not turn going in just strait to the wall no matter where at in the turn and this is a sweepin high bank track. To me the right front weight seems alot low. please all thoughts to help
                        before was
                        lf617 rf501
                        lf 699 rr661

                        left%54.1
                        cross 47.2
                        rear%55
                        everything else the same
                        Last edited by bluemod; 05-13-2012, 09:42 PM.

                        Comment

                        • bluemod
                          Senior Member
                          • Aug 2011
                          • 214

                          #27
                          we swaped everything back to the way it was the last couple races when we were running good whats the easyest way to loosen the car up getting in

                          Comment

                          • charcoal01
                            Senior Member
                            • Jul 2008
                            • 545

                            #28
                            Raise the right lower or add steer.

                            Comment

                            • bluemod
                              Senior Member
                              • Aug 2011
                              • 214

                              #29
                              Will this have anyother effects on the car besides on entry? Also lowerin the j-bar on the frame puting more angle on it what does this do?

                              Comment

                              • xxxmod
                                Senior Member
                                • Jan 2012
                                • 111

                                #30
                                Originally posted by bluemod View Post
                                we swaped everything back to the way it was the last couple races when we were running good whats the easyest way to loosen the car up getting in
                                More back brake,better back brakes,softer front brake pads.

                                Comment

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