shortening RR wheelbase

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • el paso mod 19
    Member
    • May 2013
    • 65

    #1

    shortening RR wheelbase

    My car does not want to stay under me when picking up the throttle. It just wants to keep going to the wall. I have been told to shorten RR wb. I was even up. I shorten RR, and now have the right side 3/4" shorter. Haven't had car out yet but got to thinking "what happens to the handling if I go too far? And what is going to short? Can you give me some heads up on what to expect? Right now the car enters good but as soon as I try to get on the gas it goes to the wall until I get out of the throttle. Thanks
  • jsf74
    Senior Member
    • Aug 2011
    • 544

    #2
    your making the car tighter? do u have a push or are u loose.

    Comment

    • el paso mod 19
      Member
      • May 2013
      • 65

      #3
      To me it feels like loose. Or is it too much rear steer? Backend does not stay under me, just drives rear towards wall. Doesn't feel or sound like the tires are getting buzzed, just keeps driving around towards the front.

      Comment

      • 7uptruckracer
        Senior Member
        • May 2009
        • 1336

        #4
        Could be too little bite static or dynamic because you described it only on throttle and a rear end tracking deal would be tailed out all the time I definitely don't agree if you were already square to suck the RR in thats not a good compromise at all you want to pick something that will effect the least elsewhere. Maybe look into a LR spring, Stagger or Bite depending on how you are in other parts of the corner, Post your scale and spring info

        Comment

        • JustAddDirt
          Senior Member
          • May 2007
          • 1893

          #5
          how much stagger are you running?
          I think there should be lifeguards in the genepool.

          Comment

          • Mod77L
            Member
            • Nov 2009
            • 46

            #6
            You might be on to something with the rear steer. How much angle is in your LR lower bar? Too much angle will send the car to the wall on the throttle just as you describe.

            Comment

            • el paso mod 19
              Member
              • May 2013
              • 65

              #7
              I was running almost 2" and moved it down to 3/4" stagger. Did help some but not enough. LL bar is about 6 degrees(I'm out of town and don't have my setup book with me), LU is 23 degrees, RL level, and RU 16 degrees. I've been warned that with the right side leading that it may want to steer towards the wall if I would have to get off the throttle suddenly, because of coming down off the bars too fast. By the way, car is spring behind/shock in front on left side and shock/coilover in front on right side. Also, with leading right side, it would seem to me that I would need to get back on throttle quickly after turning in to keep from getting a push. Trying to learn as much as possible before getting car on track and take a chance of plowing into wall on first lap.

              Comment

              • powerslide
                Senior Member
                • May 2007
                • 2696

                #8
                With that little of stagger and the RR shorter i cant see how you would still be chasing the rear of the car up the track. Where are you measuring trail to/from? Who built the car?

                Comment

                • el paso mod 19
                  Member
                  • May 2013
                  • 65

                  #9
                  Powerslide, I haven't had car out since I shorten the right side. I think it will help my problem but wanted input. The car is an AOS which is built by local driver. Front on metric with chevelle lowers and pinto spindles. His cars are fast, I just have something a little off.

                  Comment

                  • racin6mod
                    Senior Member
                    • Feb 2008
                    • 2172

                    #10
                    did you mean nova lowers with pinto spindles?

                    Comment

                    • el paso mod 19
                      Member
                      • May 2013
                      • 65

                      #11
                      Yes. Sorry.

                      Comment

                      • powerslide
                        Senior Member
                        • May 2007
                        • 2696

                        #12
                        I wouldnt go past even. What backspace RR? Sounds like something is bound up, have you taken birdcages off and checked them? Have you traveled the rear suspension through its motions and make sure something isnt bound? Checked RR shock still good? What RR spring is in it and how far down on the birdcage is the mount?

                        Comment

                        • 7uptruckracer
                          Senior Member
                          • May 2009
                          • 1336

                          #13
                          I agree with powerslide 100% Your bars aren't that radical at all.... check for binds. post complete rear end spring shock and scale info you shouldn't have to lead the RR. What tire are you on? How much bite etc. Lr Drop? Bar angle at full drop?

                          Comment

                          • Dirtrunner35
                            Senior Member
                            • May 2010
                            • 632

                            #14
                            HMM sounds like your driving the car in and getting on the gas WITHOUT the rear sliding a little and it goes to the wall when hitting the gas,

                            Comment

                            • missile07
                              Senior Member
                              • Aug 2007
                              • 680

                              #15
                              We pull the RR forward just about all the time for driver feel. Says he can really tell a difference after the car starts to tail out, but we do run a little more drop than normal.

                              By forward I mean even to 1/2 inch forward. Seems to help him get under cars coming out of the turn. Just my opinion.

                              Comment

                              Working...
                              X