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Should new Bilstein sports feel this still.

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  • Should new Bilstein sports feel this still.

    Feel like I'm bouncing around like a car with cut springs right now. Not sure if new bilstein sports shocks it suppose to be this stiff. I have Bmw Motorsport springs and just installed new bilstein sports and it's crazy stiff. Feels like there isn't any compression. Car rides 1/2 inch higher then it did before also.

    Anyone else experience this with new bilsteins? Can't imagine this softens up over time.

  • #2
    Originally posted by tl33 View Post
    I have Bmw Motorsport springs and just installed new bilstein sports and it's crazy stiff. Feels like there isn't any compression. Car rides 1/2 inch higher then it did before also.

    Anyone else experience this with new bilsteins? Can't imagine this softens up over time.
    What rate are the springs?

    The Bilstiens are gas pressureised and therefore do add a little to the ride height.
    Sport Evo No.47

    My Sport Evo Restoration

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    • #3
      I also have Bilstein sport shocks and stock springs, and it is quite stiff, when compared to either good stock shocks or Bilstein heavy duty. Especially on rough roads, which we have plenty of here in rural CA. On smooth roads they're OK.
      Larry

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      • #4
        Bilstein sport shocks, h&r race springs. Yes, my ride is pretty stiff although mostly due to my springs.

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        • #5
          How low is the car? The problem with gas filled shocks is that they are compressed at rest, and more compressed they are the stiffer they get. I actually prefer the non gas Koni's for this reason.



          - Tire is the other control arm bushing.

          zhpregistry.net

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          • #6
            All this gas talk is giving me flatulence.
            --------------------------------------
            The God's chariot... (OO==[][]==OO)
            sigpic

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            • #7
              Originally posted by noro View Post
              How low is the car? The problem with gas filled shocks is that they are compressed at rest, and more compressed they are the stiffer they get. I actually prefer the non gas Koni's for this reason.
              ^This.^

              I briefly ran Bilsteins and hated them. I wanted a fairly stiff ride, but the Bilsteins made it feel like the car had no suspension at all. They were so stiff it almost felt like it was the chassis flexing over bumps more than the suspension traveling.

              Konis feel "right" to me.

              Contrary to what many believe, stiff shocks contribute far more to a harsh ride than spring rates do.
              Last edited by Ironhead; 05-29-2015, 10:19 AM.

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              • #8
                I just installed a Bilstein/eibach b12 kit on my m3 and i hate to say it but i agree with ironhead. On anything but a smooth road "harsh" is the only way to describe the ride... i went downtown last night for the first and last time as the roads are abysmal and i was cringing with every pothole and patch.... i was fearing for my frame... on a smooth road however the combination is awesome...

                Im rebuilding a 1990 318iS and will be putting something much more forgiving on.... koni's maybe....

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                • #9
                  Originally posted by Ironhead View Post

                  . They were so stiff it almost felt like it was the chassis flexing over bumps more than the suspension traveling.

                  .
                  Wow. Honestly, thats kinda how I feel with brand new bilsteins and h&r race springs. Looks like Im on the market for a set of konis

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                  • #10
                    The thing is also, there is no need for that degree of harshness. I track my car all the time and it corners pretty much dead flat, yet the ride quality on bumpy roads is quite tolerable.

                    I know it has fallen out of fashion a bit in recent years for some reason, but I still think the Ground Control/Koni setup for these cars is hard to beat for the money. There are sexier (more expensive) setups out there, but I have been using the GC setup for over 10 years now and have never really come up with any excuse to try anything else (and I am a serious hardware nerd). They are good at integrating shock adjustment/valving with spring rate, so you can just bolt the parts in and go.

                    The setup just works, for around half the money of some of the sexier stuff. The 450 front/650 rear spring rate seems to be what most settle on. It is completely street friendly, yet very capable on the track.

                    I seriously question the benefit of the really expensive suspensions on any car that has not been completely caged (rigid chassis) anyway.
                    Last edited by Ironhead; 05-29-2015, 02:30 PM.

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                    • Grinder
                      Grinder commented
                      Editing a comment
                      Ironhead, how low does this drop the car? I am pretty sure I am still on a stock setup with 140K but need to change shortly. I currently have about a 1.75" wheel gap front and rear. Want to lose about 1.25" of the gap when I change.

                    • Ironhead
                      Ironhead commented
                      Editing a comment
                      The Ground Control suspension is adjustable. I would estimate it allows you adjustment anywhere from stock to around a 2" drop.

                  • #11
                    On the website they have three offerings: Coilovers, coilovers kit, and Coilovers street touring kit. Do I need the plates in the kit to get it to factory spec when it drops? I don't plan on tracking the car yet so I don't need excessive camber adjustment. Coilovers or street touring?

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                    • #12
                      Something I remembered is that the Bilstien Sports have internal bump stops. These are quite long and therefore if you lower the car significantly, you will be sat on the bump stops, which will increase the effective spring rate significantly.

                      I use Bilstien Sports with 150lb/in Fronts and 430lb/in rears at the stock ride height and it rides perfectly well, even on the UK's crappy roads.

                      In the UK, Bilstein offer a rebuild service and you can have them re-valved and the bump stops shortened.
                      Sport Evo No.47

                      My Sport Evo Restoration

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                      • #13
                        Originally posted by Grinder View Post
                        On the website they have three offerings: Coilovers, coilovers kit, and Coilovers street touring kit. Do I need the plates in the kit to get it to factory spec when it drops? I don't plan on tracking the car yet so I don't need excessive camber adjustment. Coilovers or street touring?
                        I have the complete coilover kit.

                        I am concerned about offering too much advice because I bought mine over 10 years ago and I know their offerings and kits have changed since then.

                        If I were you I would just call GC to get specifics. Just make sure you talk to Jay Morris, the owner. GC got some bad reviews several years back because a lot of the "order filling guys" who worked there had a bit of an attitude and weren't too knowledgeable. I have never heard anyone say anything negative about the owner. He is a died in the wool BMW guy and I think he even owns a modified E30....or did at one time. He definitely knows what he is talking about and will steer you in the right direction.

                        If you are going to significantly lower the car, you will definitely want some spacers like these (you can get them elsewhere) in roughly the same thickness of the amount you are lowering:

                        http://www.akgmotorsport.com/catalog...ion%2FBushings

                        Without them, bump steer will make the car very squirrely and you won't like the result.

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                        • #14
                          Good discussion here guys. Grinder, I actually just emailed GC about their offerings for my sporty-street-slight-drop application, I'll let you know what they say. I bought a set of Bilstein sports and was planning to go with H&R Sports but this thread and some friendly advice have given me pause.

                          GC coilovers would be the easy choice except that it requires the stock strut housings to be modified... I like to keep all of my modifications reversible.

                          I'm looking at this now: http://www.ground-control-store.com/...ion.php/II=912
                          1988 Lachs - sold
                          1988 DS - sold
                          Bay Area M3 FB group

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                          • #15
                            Two quick questions, where do the bump spaces actually go within the stack? If I put plates at the top of the stack for camber adjustment, can I still run a strut brace bar? I currently have a racing dynamics custom-built bar but would like to change to a Mason (I think that's the name)

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