Chassis jumping when heavy launching

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  • VladaS2
    S2Forum Enthusiast
    • Aug 2006
    • 185
    • Country: Yugoslavia

    #1

    Chassis jumping when heavy launching

    I have noticed my coupe lifts it's front significantly when doing 6000+ rpm launches - like a shark on attack. I reckon a lot of energy is wasted that way.

    I've heard that it's the shocks that are causing this, not the springs. I already have yellow Koni's (with default springs) so I would like to hear some opinions on this.

    Cheers
    My Online Blog
  • GT500
    S2Forum Fiend
    • Jun 2006
    • 2181
    • Country: United Kingdom

    #2
    Originally posted by VladaS2
    I have noticed my coupe lifts it's front significantly when doing 6000+ rpm launches - like a shark on attack. I reckon a lot of energy is wasted that way.

    I've heard that it's the shocks that are causing this, not the springs. I already have yellow Koni's (with default springs) so I would like to hear some opinions on this.

    Cheers
    Thats what you get with crappy Konis! Waste of time, Bilstiens needed.
    Rob..
    94 RS2 Noggy,LHD,MTM map,18"cup 1s,245/35/18,Bilsteins,RS2 H&Rs,Cup splitter.
    87 UR 20v ABY
    97 S6 Avant
    96 A6 C4 2.5 TDI quattro avant,Ming,Wietec/eibach,chipped
    1967 Ford Mustang,Eleanor,460ci v8

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    • S2central.net
      Retired OG Mod
      • Jul 2003
      • 16590
      • Country: Northern Ireland

      #3
      Hmmmm - easy with the Koni bashing there - I have lots of vids and watched many big power URs and S2s on the drag strip for launches. It is amazing how they hunch down at the rear and lift the nose... Been that way since first WRC cars... DUnno what the cure is - I posted a Q on this last week actually.


      PAul
      Paul Nugent
      Webmaster http://S2central.net
      Administrator http://S2forum.com

      1994 S2 Coupe ABY - aka Project Lazarus
      2001 A6 allroad 2.5TDi - family tank
      2003 S4 Avant 4.2 V8 - daily burble

      Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

      There are only 10 kinds of people that understand binary - those that do, and those that don't

      Comment

      • GT500
        S2Forum Fiend
        • Jun 2006
        • 2181
        • Country: United Kingdom

        #4
        Sorry Paul BUT I tried two sets of those yellowey orange joke shockers on my UR. Just rubbish. It would rear up like tontos horse when the boost came in! and rolley polley on track!
        Bilsteins just transform the whole car,
        I think Koni get a load of boge oe shockers and paint them their colour. I couldn't tell the difference!
        Have you tried the same car with both makes?
        Last edited by GT500; 3 July 2007, 22:45.
        Rob..
        94 RS2 Noggy,LHD,MTM map,18"cup 1s,245/35/18,Bilsteins,RS2 H&Rs,Cup splitter.
        87 UR 20v ABY
        97 S6 Avant
        96 A6 C4 2.5 TDI quattro avant,Ming,Wietec/eibach,chipped
        1967 Ford Mustang,Eleanor,460ci v8

        Comment

        • mcandmar
          S2Forum Zealot
          • Apr 2004
          • 5118
          • Country: Ireland

          #5
          Kills me to say it, but i know scooby owners fit anti lift kits to stop that. No idea how they work..

          Mark.
          91CQ20v - Gone to a new home
          93UR-S4 - The Magic Carpet
          94S2Bus - The Emerald Express

          Comment

          • mcandmar
            S2Forum Zealot
            • Apr 2004
            • 5118
            • Country: Ireland

            #6
            P.S. Found this http://www.subarureview.com/showreview.php?id=26 , looks like its just a geometry change
            91CQ20v - Gone to a new home
            93UR-S4 - The Magic Carpet
            94S2Bus - The Emerald Express

            Comment

            • VladaS2
              S2Forum Enthusiast
              • Aug 2006
              • 185
              • Country: Yugoslavia

              #7
              Whiteline Anti-Lift kit? Sounds interesting. Wonder if there is one for S2...?
              My Online Blog

              Comment

              • Keeper of The Kitten
                S2Forum Fiend
                • Dec 2003
                • 2317
                • Country: England

                #8
                Usually, it's all about angling the lower wishbone legs to converge at a higher point towards the longitudinal centre of the vehicle - that means the rear leg higher than the front leg on front wishbones, and the front leg higher than the rear leg on rear wishbones.

                This counteracts excessive lift and dive/squat at each end to a certain degree, depending on how severely angled the wishbones are.

                To explain this a little more: taking the geometry to extremes, if you rotated the wishbones all the way over so that both inboard points are aligned vertically instead of horizontally, the wishbones won't move up or down at all.

                It's also possible to fit droop limiters in an effort to counteract front wheels lifting, which can be as simple as a piece of cable or chain, but that's something which needs careful consideration as the effect when cornering might be less desirable.
                Martin Cutting

                aka Keeper of "The Teutonic Kitten"

                It's not better than sex, but it runs it a close second.

                Comment

                • maRS2
                  S2Forum Addict
                  • Oct 2003
                  • 366
                  • Home: France Current: Thailand

                  #9
                  The Main thing that the Subaru Anti lift kit does is ad some caster angle.
                  Had it on my ex Subaru and lot of talk about it.

                  I think the Audi have very small caster angle oem.
                  so something like that could help:
                  Looking for more caster in your small Chassis Audi 4kq/CGT/80/90/CQ/RS2? We now have a simple solution that not only gives a more secure mounting of the subframe, but also caster adjustment. Bushings include 2 offset positions and are supplied with steel dowel pins and file to create a...
                  RS2 chip by mihnea,PKM short IM, forge dump valve, 3" custom stainless exhaust, 18"X8" Porsche 996 rims, conti contact 245/35 Front 225/40 Rear, QR sport top mount, Powerflex bushes, aloy sub frame bushes, neuspeed 19mm RARB,Hard tranny mount, V8 torsen on RS2

                  Comment

                  • S2central.net
                    Retired OG Mod
                    • Jul 2003
                    • 16590
                    • Country: Northern Ireland

                    #10
                    Originally posted by Keeper of The Kitten
                    Usually, it's all about angling the lower wishbone legs to converge at a higher point towards the longitudinal centre of the vehicle - that means the rear leg higher than the front leg on front wishbones, and the front leg higher than the rear leg on rear wishbones.

                    This counteracts excessive lift and dive/squat at each end to a certain degree, depending on how severely angled the wishbones are.

                    To explain this a little more: taking the geometry to extremes, if you rotated the wishbones all the way over so that both inboard points are aligned vertically instead of horizontally, the wishbones won't move up or down at all.

                    It's also possible to fit droop limiters in an effort to counteract front wheels lifting, which can be as simple as a piece of cable or chain, but that's something which needs careful consideration as the effect when cornering might be less desirable.

                    Very nice explanation there - thanks !
                    Paul Nugent
                    Webmaster http://S2central.net
                    Administrator http://S2forum.com

                    1994 S2 Coupe ABY - aka Project Lazarus
                    2001 A6 allroad 2.5TDi - family tank
                    2003 S4 Avant 4.2 V8 - daily burble

                    Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

                    There are only 10 kinds of people that understand binary - those that do, and those that don't

                    Comment

                    • dan_b
                      S2Forum Possessed
                      • Sep 2003
                      • 3670
                      • Home: United Kingdom Current: England

                      #11
                      Originally posted by GT500
                      Sorry Paul BUT I tried two sets of those yellowey orange joke shockers on my UR. Just rubbish. It would rear up like tontos horse when the boost came in! and rolley polley on track!
                      Bilsteins just transform the whole car,
                      I think Koni get a load of boge oe shockers and paint them their colour. I couldn't tell the difference!
                      Have you tried the same car with both makes?
                      I think Newsh has direct experience of replacing OE with Konis on standard springs?
                      Ex S2 owner, now running around in an A4 Avant quattro...

                      Comment

                      • 4WheelDrifter
                        S2Forum Zealot
                        • Oct 2004
                        • 5773
                        • Country: Devon

                        #12
                        I've not noticed Audiman's car jump about on launches.
                        SS

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