Help with my base suspension setup, 08 GT Koni and steeda content.

Discussion in 'Suspension and Chassis' started by Crowd Chaser 08, Jun 14, 2019 at 5:17 AM.

  1. Crowd Chaser 08

    Crowd Chaser 08 TMO Beginner

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    Hi all,

    New member and S197 owner here.

    I recently picked up an 08 GT Premium with comfort and appearance package. It has decent engine mods making 330 RWHP, suspensions is a wreck. Currently it has Eibach sportline springs on stock shocks, it is way too low and almost on the bump stops. Looks cool, handles for poo.

    Sold my 92 GT and picked this up as the Fox chassis cars are going up in value and this one was a good deal with 26k miles on it. The 92 was my HPDE car and summer DD, that's what I want from the 08 also.

    My local tracks are Gingerman and Grattan with the latter being my favorite. I race in the Lemons series in an 89 notchback, that cures my itch to compete.

    Lets start with what I have, to work with.

    Full weight car.
    Steeda competition springs and sway bars, Koni sports, Ford lower control arms, ? adjustable panhard, Steeda strut mounts. GT500 wheels with stock tire sizes, 255 F 285 R. Stock brakes with Hawk pads and hopefully ducts by then.

    This is round one to get me on the track in this thing. First event is July 17 TNiA at Gingerman, with my daughter sharing the car for her first track event.

    Do any of you have any experience with these components and have any recommendations for initial settings for the damper and sway bar settings.

    Round two will be control arm/bushing/bump steer, and a square setup for tires, in a 200TW, current tires are Conti 340TW summer tires.

    Done with the first post ramble.

    Tony
     
    Grant 302 likes this.
  2. Norm Peterson

    Norm Peterson Corner Barstool Sitter

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    With slightly stiffer springs (BMR 260 vs your 225) up front I was reasonably happy with the struts at 2 full turns up from full soft. Never really got the rear setting to my liking before the diff started making noise, but +1.75 turns was close but not there for 220 lb/in rear springs. Might be a good place to start for 185's, though.

    Caveats - I don't know how the Steeda bar stiffnesses compare to the Strano bar stiffnesses, which might affect things a little. As might your staggered setup vs the square setups I've always tracked with (255/45's on 18x9.5 GT500 wheels, 285/35's on 18x11 Forgestars).

    I'm also running the Steeda HD strut mounts, at about -1.9°, maybe -2.0° camber. Car is only lowered about 0.6", sig pic is most likely from when it was still on the OE springs. You can see a brake duct inlet. My ducting doesn't go all the way to the nozzles on the backing plates/dust shields, but it ends fairly close and has been sufficient so far (Carbotech XP8's, 10's, and 12's on the little 12.4" OE rotors, G-loc R10's on a 14" SVT/GT500 upgrade).


    Norm
     
    Last edited: Jun 14, 2019 at 6:09 AM
  3. Norm Peterson

    Norm Peterson Corner Barstool Sitter

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    Your engine is making a good bit more power than mine, so you'll want to give some thought to gearing and tire size. You'll want to avoid needing 5th as long as you have a stock-gearset TR3650, it's just too far away from 4th. Supposedly there is an 0.81 5th, but at that point you might as well start considering 6-speed boxes.


    Norm
     

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