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2003 - 2004 Corvette Suspension Comparison

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The following information comes from page 128-131 of the September 2003 issue of Car and Driver magazine.

Specifications
  Base MSRC Z51 Z06
Spring Rates, Front/Rear, *lb/in: 440/577 457/577 525/634 525/714
Front Anti-Roll-Bar dia x wall thickness, in: 0.91 x 0.15 0.91 x 0.15 1.13 x 0.18 1.18 x 0.18
Rear Anti-Roll-Bar dia x wall thickness, in: 0.68 x 0.10 0.68 x 0.10 0.93 x 0.14 0.93 x 0.14
Shock Absorbers: Sachs 34mm gas-charged monotube Delphi MagneRide monotube Sachs 45mm gas-charged monotube Sachs 45mm gas-charged monotube
Wheels: F: 8.5 x 17 in,
R: 9.5 x 18 in
F: 8.5 x 17 in,
R: 9.5 x 18 in
F: 8.5 x 17 in,
R: 9.5 x 18 in
F: 9.5 x 17 in,
R: 10.5 x 18 in
Tires: Goodyear Eagle F1 GS Extended Mobility,
F:  P245/45ZR-17,
R:  P275/40ZR-18
Goodyear Eagle F1 GS Extended Mobility,
F:  P245/45ZR-17,
R:  P275/40ZR-18
Goodyear Eagle F1 GS Extended Mobility,
F:  P245/45ZR-17,
R:  P275/40ZR-18
Goodyear Eagle F1 Supercar,
F:  P265/40ZR-17,
R:  P295/35ZR-18
Curb Weight, lb: 3,270 3,290 3,293 3,152
* Rear spring rates shown are for manual-transmission test cars. Add 11 lb/in for automatics.

Performance Review
  Base MSRC
Tour
MSRC
Sport
Z51 Z06
Stock Tires
Roadholding, 300-ft Skidpad, g: 0.91 0.90 0.91 0.92 0.98
Emergency-lane-change maneuver, mph: 61.4 60.7 62.9 65.2 68.6
Increasing/decreasing slalom, *mph: 49.8/49.9 51.4/49.6 49.0/51.0 51.6/51.5 54.5/55.1
Autocross Course, sec: 59.0 59.2 57.7 57.1 55.4
Racecourse Segment, sec: 54.3 52.9 53.3 52.8 50.8
Z06 Tires
Roadholding, 300-ft Skidpad, g: 0.93 0.96 0.96 0.96 0.98
Emergency-lane-change maneuver, mph: 63.4 62.6 62.4 68.5 68.6
Increasing/decreasing slalom, *mph: 53.9/52.9 54.8/51.4 54.4/54.0 55.6/54.8 54.5/55.1
Autocross Course, sec: 57.4 57.3 57.1 56.0 55.4
Racecourse Segment, sec: 51.4 51.5 51.4 51.8 50.8
* This 938-foot slalom consists of 10 gates, eath of which is 6 feet longer and spaced 3 feet farther apart so that it becomes two different courses when run in two directions. In the increasing direction, the car is accelerating so there is weight transfer to the rear axle. Conversley, in the decreasing direction, the car is slowing and loading the front-tire contact pathes. It should also be noted that the Z06's shorter gearing required a 2-3 upshift before the end of the course when running in the increasing direction, which cost it roughly 0.25 second (1.2 mph) on those runs.

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