SS #670 Modifications:
Springs

[General Motors]

When I first installed a Spohn torque arm, I started having a lot of problems with torque arm cross member clearance. It seemed really easy to hit speed bumps. I talked to Steve and he explained that the Eibach springs that are part of the Bilstein Suspension package lower the car. This was certainly news to me. I called SLP and they denied any change in ride height. But I went to my dealer and measured all of the SS's they had; before I was done I could tell if a car had Eibachs simply by checking the rear ride height. All of them (including mine) were as much as 2" lower in the rear.

I had also upgraded my sway bars and found that the stiffer bars and the Eibach springs were a bit too much. The back end would tend to break loose without warning during hard cornering. Stiffer sway bars reduce body roll but they also increase spring rate on the loaded corner of the car. Putting (slightly) softer springs in seemed like the solution so I installed the 1LE/SS springs that would have been stock on an early production 2000 SS.

Application Front Rear
Rate Part # Rate Part #
1998-2000 Z28 292 lb/in GM 22077197 114 lb/in GM 22077421
1998-1999 1LE 360 lb/in GM 22132887 130-180 lb/in GM 22132889
1998-2000 SS
1998-2000 Y2Y Bilstein 300-450 lb/in SLP 70009 115-185 lb/in SLP 70009

The 1LE/SS part numbers were only used on early production 2000 SS cars and are no longer available; late production received Z28 springs. The SLP Eibach spring are now sold as a front/rear set. And their webpage now notes they are up to lower 1" than stock.

I'm happy with my new setup. The car rolls slightly more in when cornering and it's easier to tell where the limit is. Now it handles more like a car and less like a go-cart.


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[SS #670 Mods: Sway bars] [SS #670 Mods: Shocks and struts] [SS #670 Mods: Springs] [SS #670 Mods: Panhard bar] [SS #670 Mods: Lower control arms] [SS #670 Mods: Subframe connectors] [SS #670 Mods: Adjustable torque arm]
[SS #670 Mods: Differential] [SS #670 Mods: ZR1 wheels] [SS #670 Mods: Shock tower brace] [SS #670 Mods: Brakes] [SS #670 Mods: Hurst billet plus shifter] [SS #670 Mods: Heel/Toe throttle extension plate] [SS #670 Mods: Driveshaft safety loop]
[SS #670 Mods: Radiator] [SS #670 Mods: Oil cooler]
[SS #670 Mods: Differential vent tube] [SS #670 Mods: Shiftlight] [SS #670 Mods: Airbox lid] [SS #670 Mods: Polyurethane bushings]
[SS #670 Mods: Auto Meter gauge pod] [SS #670 Mods: Disable CAGS] [SS #670 Mods: Disable daytime running lights]

[SS #670 Mods: EFILive] [SS #670 Mods: LS1_Edit]
[SS #670 Mods: Battery] [SS #670 Mods: Valentine One remote display] [SS #670 Mods: Headlights] [SS #670 Mods: iPod integration] [SS #670 Mods: LEDs] [SS #670 Mods: Cellular phone] [SS #670 Mods: Zaino Bros' show car polish]

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Craig Leres