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Biggest front sway bar for S4 with a greedy oil pan

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  • Biggest front sway bar for S4 with a greedy oil pan

    What is the biggest front sway bar for a S14 with a greddy oil pan?
    Chicago Region SCCA SM # 688 http://www.scca-chicago.com
    TSSCC SM # 688 http://www.tsscc.org

  • #2
    Depends on how custom you want to go. I know a couple people that have done some slight chassis mods and use a straight "NASCAR" style sway bar up front. at that point, you can go as big as you want.
    Originally posted by SoSideways
    I don't care what color they are as long as they are LONG AND HARD.
    '04 G35 Sedan 6MT- The DD
    '96 240SX- The Track Toy

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    • #3
      I've been looking at the nascar bar more and more. It's nice to be able to tune it a ton with a new bar on top of end link movement tuning.
      '18 Chevrolet Volt - Electric fun hatch for DD duty!


      DefSport Koni Sleeve and Spring Perch Buy!!!
      http://www.nissanroadracing.com/showthread.php?t=5902

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      • #4
        I got some help from a pro driver this weekend. He autocrossed my car on Sunday and had some great tuning advice. He suggested a nascar style front bar but looking at the Greddy pan. I would have to change where it mounts. I don't know if that is allowed in SM. I'll have to check the rules.

        From what I've seen about off the shelf ones. The whiteline is 28mm, the megan I have is 27mm and the progress is 30mm. Both the progress and whiteline are adjustable so on full stiff they should be significantly more stiff than the Megan I currently have on there.
        Chicago Region SCCA SM # 688 http://www.scca-chicago.com
        TSSCC SM # 688 http://www.tsscc.org

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        • #5
          Suspension techniques is also 28mm, but it's non-adjustable and uses the donut-on-a-shaft type of mounting bushings. I cut that off and welded a tab with multiple holes in it to give me some adjustment. can't tell you rates as I *think* the center hole is about the same as the original and I have a couple more holes about 1/2" spacing. I also moved the mounting point on the control arm just a touch so I'm really not sure where everything is if you want to count numbers.
          I know the thing is stiff enough to break the 3/8" GR8 bolts on a somewhat regular basis. They are in single-shear, but still...
          Originally posted by SoSideways
          I don't care what color they are as long as they are LONG AND HARD.
          '04 G35 Sedan 6MT- The DD
          '96 240SX- The Track Toy

          Comment


          • #6
            Can you weld a mount on the strut and do that as the attachment point?

            That's kinda my plan at some point, as I'm tired of trying to make the FLCA attachment thing work reliably.
            '18 Chevrolet Volt - Electric fun hatch for DD duty!


            DefSport Koni Sleeve and Spring Perch Buy!!!
            http://www.nissanroadracing.com/showthread.php?t=5902

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            • #7
              And yes, a straight splined bar will need to have the mounting points moved out at the very least. I was thinking mounts could be made from some welded up DOM tubing to the frame.
              '18 Chevrolet Volt - Electric fun hatch for DD duty!


              DefSport Koni Sleeve and Spring Perch Buy!!!
              http://www.nissanroadracing.com/showthread.php?t=5902

              Comment


              • #8
                DOM tubing or bearing mounts.. http://www.mcmaster.com/#standard-mo...arings/=ucna9h

                The ones I've seen use a flange-mount bearing and/or some DOM tubing welded to a structural member- usually right above/below the frame rails.

                My only problem with mounting the endlinks to a strut is the great deal of movemement they undergo during steering and suspension travel. to keep the load changes consistent on the sway bar side, you have to use a long endlink and that winds up with additional unsprung weight, stress on things that didn't have stress before, and complicated geometry making sure the endlinks don't bind anywhere.

                I would still rather see the sway bars mounted to control arms via double-shear mounts. and adjustability on either sway bar length or control arm position.
                Originally posted by SoSideways
                I don't care what color they are as long as they are LONG AND HARD.
                '04 G35 Sedan 6MT- The DD
                '96 240SX- The Track Toy

                Comment


                • #9
                  The problem with mounting them to stock control arms is that very stiff arms are actually turning the arm into a secondary non-linear spring in series. So it makes tuning things difficult.

                  It's not THAT hard to put a sway bar link on a strut as long as it's pretty long, and we're talking about a few ounces of unsprung weight. I wouldn't call it that big of a deal considering the endlink on your control arm is "half" unsprung weight.
                  '18 Chevrolet Volt - Electric fun hatch for DD duty!


                  DefSport Koni Sleeve and Spring Perch Buy!!!
                  http://www.nissanroadracing.com/showthread.php?t=5902

                  Comment


                  • #10
                    Hey.. you guys are the ones buying aluminum and titanium lugnuts to save a couple ounces.. :P
                    Originally posted by SoSideways
                    I don't care what color they are as long as they are LONG AND HARD.
                    '04 G35 Sedan 6MT- The DD
                    '96 240SX- The Track Toy

                    Comment


                    • #11
                      the sikky bar is pretty thick, 32mm w/ 3 stifness adjustments. it's also made to clear engine swaps with big pans or pans located in a different area, so i'd imagine an sr20 greddy would clear. but maybe the internet can confirm that.

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                      • #12
                        SM rules say nothing about sway bars but anything allowed in SP or ST is allowed in SM. ST rules state that method of attachment and locating points are unrestricted. Sounds like I can do a nascar style bar per the rules even if I have to move the mounts forward 6" or so.
                        Chicago Region SCCA SM # 688 http://www.scca-chicago.com
                        TSSCC SM # 688 http://www.tsscc.org

                        Comment


                        • #13
                          The problem with the ST rules though is I don't think you can cut into the chassis (or maybe interior?) to mount the bar. I remember a few years ago Hollis had a rear bar that went through his spare tire well and he had to change the design.
                          Originally posted by SoSideways
                          I don't care what color they are as long as they are LONG AND HARD.
                          '04 G35 Sedan 6MT- The DD
                          '96 240SX- The Track Toy

                          Comment


                          • #14
                            Originally posted by gawdzilla View Post
                            the sikky bar is pretty thick, 32mm w/ 3 stifness adjustments. it's also made to clear engine swaps with big pans or pans located in a different area, so i'd imagine an sr20 greddy would clear. but maybe the internet can confirm that.
                            I think it's a solid boat anchor of a bar as well. Voted meh.

                            I'd rather mod up a 30 mm hollow Chinaspeed bar that's on eBay.
                            '18 Chevrolet Volt - Electric fun hatch for DD duty!


                            DefSport Koni Sleeve and Spring Perch Buy!!!
                            http://www.nissanroadracing.com/showthread.php?t=5902

                            Comment


                            • #15
                              I think I have a Tanabe 32mm. Don't know if they're still available or not, or if the greddy sump would interfere with it. That's the largest off the shelf bar that I've seen.

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