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Neutral suspension setup - Page 2
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Thread: Neutral suspension setup

  1. #11
    Senior Member nilfinite's Avatar
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    As far as I know, the best practices for this car haven't been fully figured out yet.

    I've been tweaking my setup for a while now and haven't gotten to the perfect setup yet. I need to try more parts (aka spend more money) to find the perfect configuration.

    So far what I've learned is that rear ride height makes a huge difference on the car's balance (this applies if you have coilovers). Increase the rear height (assuming the front height stays the same) and get more oversteer.

    My current hypothesis is that the this car actually needs a front sway bar to maximize front grip at the limit. To balance out the increased stiffness of the front sway, need an even stiffer rear torsion bar.

    I've tried these mods:
    Neu-F 28mm torsion bar
    CPR 30mm torsion bar (tapered to fit stock brackets)
    CPR front lower bar
    RRM Chassis Bars
    Bilstein Coilovers
    Whiteline Caster bushings to get to 3.9 degrees of Caster
    -1.75 Camber & -2.0 Camber
    0 Toe & -0.06 Toe

    All of these changes were incremental improvements (especially the torsion bar & coilovers) but I'm still not happy with the front suspension. It does crazy stuff at the limit, reducing front grip and inducing understeer.
    Last edited by nilfinite; 12-11-2014 at 05:51 PM.

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    texanbrit (12-15-2014)

  3. #12
    Senior Member zyxelenator's Avatar
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    Next oil change I will remove front lower bar and see what happens on same road. Regarding alignment, my rear got shims and should be close to 0 toe now and front has camber bolts set to -1 degree and 0 toe.
    Found specs of my springs: Color: Blue; Lower rate: 1.0-Inch Front, 1.35-Inch Rear ; Spring rate: 280F & 230R
    Last edited by zyxelenator; 12-11-2014 at 07:45 PM.
    Dmytriy
    Red 2013 500T
    Forge blow off plate, Injen intake, TMC catless DP, Tork Tune, TuningPros lowering springs, Boomba check valve, Neu-f short shifter adaptor,Red leather shift boot, STS rear sway bar,CPR lower brace bar,CPR engine cover (RED), Madness upper strut bar, Ported TB, Red PTP turbo Blanket,Red HPSI silicone hoses, CPR red X bar, CF hood,AAD AOS, EL Gato braces.
    Silver 2006 BMW 550i -stock
    Silver 2006 Nissan Frontier XE 5 speed -stock

  4. #13
    Lifetime Member Lifetime Member Gundy's Avatar
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    Hmmmm...getting this high centered front engine front wheel drive neutral.
    Good one!
    I am embraceing the understeer. Just a different driving style. I like my twitchy
    over steering Sprite. I can see where I can even induce understeer with suspension
    changes. BUT.....the thing has 50/50 weight distribution.
    These puppies are front end loaded. Nature of the beast. In too fast? Crank the wheel
    and let the scrub begin. Hope it slows before you are off and WOT when ya can.
    Fun stuff.
    I embrace it's style.
    Still, I did add chassis braces and a upgraded torsion bar and Koni shocks.
    Still understeers. Just tighter feeling.
    It is a LOT better under heavy braking with the mods.
    The dang thing corners like it is on rails. Just gotta find that right speed
    going in.
    2013 Abarth

  5. #14
    Senior Member jguerdat's Avatar
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    Quote Originally Posted by zyxelenator View Post
    Regarding alignment, my rear got shims and should be close to 0 toe now and front has camber bolts set to -1 degree and 0 toe.
    Generally, less negative front camber = less front bite (more understeer). This can be balanced with spring rates but not with what you have installed.
    Jeff Guerdat

    2013 Fiat 500 Abarth
    1970 Fiat 850 Spider
    2016 Cadillac ATS-V 6 speed manual

  6. #15
    Senior Member zyxelenator's Avatar
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    What would be DD friendly front camber?( Not to chew up tires fast) - 1.75?
    Dmytriy
    Red 2013 500T
    Forge blow off plate, Injen intake, TMC catless DP, Tork Tune, TuningPros lowering springs, Boomba check valve, Neu-f short shifter adaptor,Red leather shift boot, STS rear sway bar,CPR lower brace bar,CPR engine cover (RED), Madness upper strut bar, Ported TB, Red PTP turbo Blanket,Red HPSI silicone hoses, CPR red X bar, CF hood,AAD AOS, EL Gato braces.
    Silver 2006 BMW 550i -stock
    Silver 2006 Nissan Frontier XE 5 speed -stock

  7. #16
    Senior Member jguerdat's Avatar
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    Frankly, I've been using -2.5 degrees on the front since April with even wear. That said, I autocross the car some with my daughter so the cornering wear may have an effect on the even wear.
    Jeff Guerdat

    2013 Fiat 500 Abarth
    1970 Fiat 850 Spider
    2016 Cadillac ATS-V 6 speed manual

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