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  1. #1
    Grease Monkey
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    Z8 coil-over kits

    I'm looking for input from anyone who has had experience with a coil-over kit on their Z8. Hamann makes one and I believe H&R may offer one in Europe. Anyone used either one of these or know of another coil-over kit that will fit a Z8? Thanks.

  2. #2
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    Re: Z8 coil-over kits

    KW is another source for coilovers. A variant 2 is listed on their website, I use a variant 3 with adjustable bound and rebound.
    Very good experiences so far.

    Be aware that coilovers take more space towards the wheel, so you can use 19" wheels, however, you have to stick with the original widths.

    Cheers,
    Dieter

  3. #3
    Grease Monkey
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    Re: Z8 coil-over kits

    Thanks for the information. Any idea what the spring rates are, front and rear, for the KW coil overs? Did KW take any steps to reduce weight of the components? Is the difference between Variant 2 and Variant 3 just the double adjustable dampers or is there a spring rate difference also? Do you have to remove the coil overs to adjust damping rates? Would you characterize the KW suspension as firm but street oriented or more track oriented? Thanks for your help in this matter!

  4. #4
    dwz8
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    Re: Z8 coil-over kits

    Spring rates:
    I'll investigate and will get back to you once I'll have an answer.

    Weight:
    I didn't weigh the components, perhaps the KW weight is somewhere in their documentation, then we could compare to the OEM setup.

    Difference between V2 and V3:
    The main difference is the double adjustable dampers on V3 versus adjustable rebound on V2. However, the Variant 3 is not really on their list, it was specifically developed for and on my car, and this did include stiffer springs. Again, I am waiting for a response here.

    Adjustment:
    You don't have to remove the coilovers for adjustment, everything is done in place. The process is described here
    The rebound adjustment is straightforward for the front, for the rear you simply remove the two grills and the carpet underneath the softtop, then you can see the top of the dampers.

    Street vs. Track:
    This clearly depends on the spring rate you choose and the setting of the dampers. My springs are stiff enough for track usage, however, I had my wife with me on our trip to Como (1,500 mls or so), and she didn't complain. I didn't even change the damper setting for the long trip.
    The range you can control the dampers is wide enough to accomplish both, and it takes you about 10 min. to change it.

    Compared to the ACS setup:
    - stiffer springs keep the body from rolling to much
    - stiffer bound setting does the same, and it increases mechanical grip a lot
    - stiffer rebound setting stops the body from rolling and shaking

    All in all, it keeps the car much better to the ground than ACS, however, you loose a bit of comfort.
    Mechanical grip is now - together with Dinan rollbars (unchanged setting that we all prefered on these) and 19" PZero Rosso - a LOT better than before. I must say that I hardly disable DSC right now because the grip is so good that it takes quite brute force to get into the range where DSC comes into play. Of course, I am driving the Quaife, which helps a lot as well.

    Variant 2 is all in all comparable to the ACS setup, however, you can adjust the height.
    Again: Coilovers need more room, so you may need spacers depending on which wheels you have.

    Cheers,
    Dieter

  5. #5
    Grease Monkey
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    Re: Z8 coil-over kits

    Thanks for your comprehensive reply. You are fortunate to have so many options to choose from in Germany since availability in the US is virtually nil. Any spring rate specs you come up with would be of great interest. Sounds like you've got an outstanding set up on your Z8!

  6. #6
    dwz8
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    Re: Z8 coil-over kits

    Anything you want to buy here in Germany may be shipped to the US.

    So - within reasonable boundaries - if I can be of help I would offer to get the parts here and ship them to you.

    Cheers,
    Dieter

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    Re: Z8 coil-over kits

    I am still working on getting the details. The Head of the Engineering group is in the US right now, and his notes are on his desk in Germany.
    Once he will be back he promised to send me the details.

  8. #8
    Michael
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    Re: Z8 coil-over kits

    I was under the impression the Hamann coilovers cleared the huge 20x10 and 20x11 inch wheels they also produce.

    Any knowledge of that? Dosen't shadowman have this set up?

  9. #9
    Grease Monkey
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    Re: Z8 coil-over kits

    The problem with coil overs on Z8s is they won't clear the stock wheels so you have to use at least a 19" wheel and even then spacers may be required to provide adequate clearance. I don't know if Shadowman installed the Hamann kit but I will follow up and see. Thanks for your input.

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