[jwisjw]

While I understand the SS 1LE is a great car I would like to think there could be improvements over what GM has provided.

Taking Fifty's spring data.

Non-MRC SS Rates: 137 lbs/in (Front) 577 lbs/in (Rear)
1LE Rates: 178 lbs/in (Front) 539 lbs/in (Rear)

Spring rates seem to be within the "noise". The two major variables would possibly be the MRC vs Non MRC shocks and the Non MRC SS has bumpstops that play into the suspension package vs the SS 1LE, which I don't believe it has bumpstops.

Rough Swaybar Data

Talked with a MFG and according to them the swaybars are increased ~21% in the front and 36% in the rear from the SS vs the SS 1LE

Front Bar Rate
SS - ~376lbs/inch
SS 1LE - ~457lbs/inch

Rear Bar Rate
SS - ~115lbs/inch
SS 1LE - ~157lbs/inch

From a limited autocross experience with the SS 1LE, I personally think it could improve especially with various surfaces. Transitionally it is much better than my stock SS but still a little eager in the rear, not sure if that is due to the wheel widths/shocks/swaybars. I do have a Custom Koni package that I recently installed on my SS, so I should know shortly how much that will improve the car transitionally and loading it laterally. Then I will determine if I need a front or rear bar within the next couple of events.

Looking at the overall data provided though, the SS 1LE improvements really seem to be just an OTS (off the shelf) sway bar solutions that a lot of MFG would have probably provided if the SS 1LE wasn't around. Maybe because the SS 1LE package came out, some MFG's may have changed their test mule to that package. To me it doesn't seem out of line to wonder if the ZL1 1LE offers stiffer bars.