Corvette Racing To Debut New Widebody C6.R At Sebring
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You may not have noticed, but Corvette Racing was busy during the past couple months fine-tuning its latest version of the C6.R. A wider, broader, better C6.R. And it will make its racing debut this Sunday at the start of the 12 Hours of Sebring.
Specifically, the new body style stands at 80.6 inches wide — 2 inches wider than last year’s setup that saw the only season victory during the 24 Hours of Le Mans. But this is much more than a wide body kit, as the C6.R race cars had to be fitted with new Michelin racing tires optimized for the wide stance. Additionally, the suspension system had to be completely recalibrated to better help the cars hug the track and maintain grip through corners at speed.
As for other modifications, the rear wing is mounted 75mm higher than last year, and the front fascia now bristles with dive plane “whiskers” to enhance front downforce as the 5.5-liter Chevrolet small-block V-8 breathes through twin 29.2mm intake air restrictors (.4mm larger than in 2011) as specified by the GT regulations. We’ve provided the full spec sheet just below, along with the presser.
So, who’s putting their Sunday after St. Patrick’s Day aside to watch all of the ALMS action?
2012 Corvette ZR1 and Corvette C6.R Specifications
| 2012 Corvette ZR1 | 2012 Corvette C6.R | |
| Displacement (L / ci): | 6.2 / 376 | 5.5 / 336 |
| Horsepower: | 638 @ 6500 rpm | 491 @ 5800 rpm |
| Torque (lb-ft): | 604 @ 3800 rpm | 485 @ 4800 rpm |
| Bore diameter (mm / in): | 103.25 / 4.06 | 103.89 / 4.090 |
| Crankshaft stroke (mm / in): | 92 / 3.62 | 80.90 / 3.185 |
| “V” angle (deg): | 90 | 90 |
| Cylinder bore spacing (mm / ci): |
111.7 / 4.40 | 111.7 / 4.40 |
| Valvetrain: | pushrod with overhead valves, titanium inlet | pushrod with overhead valves, titanium inlet and exhaust |
| Valves per cylinder: | 2 | 2 |
| Camshaft drive: | chain | chain |
| Cylinder case material: | aluminum | aluminum |
| Cylinder liners: | dry iron | aluminum |
| Cylinder head material: | aluminum | aluminum, CNC ported |
| Lubrication system: | dry sump | dry sump |
| Fuel system: | sequential EFI | sequential EFI |
| Throttle system: | supercharged w/intercooler, throttle body | individual runner, two 29.2mm intake air restrictors (series mandated) |
| Fuel: | premium unleaded gasoline required | E85R ethanol (ALMS) E10 (Le Mans) |
| Body style: | two-door hatchback coupe | two-door hatchback coupe |
| Drivetrain: | longitudinal front engine, rear-wheel drive | longitudinal front engine, rear-wheel drive |
| Transmission: | Tremec TR6060 6-speed manual transaxle | Xtrac 6-speed sequential transaxle |
| Chassis: | hydroformed aluminum chassis, composite body | hydroformed aluminum chassis, composite body |
| Wheelbase (mm / in): | 2685 / 105.7 | 2685 / 105.7 |
| Length (mm / in): | 4476 / 176.2 | 4476 / 176.2 |
| Width (mm / in): | 1929 / 75.9 | 2047 / 80.6 |
| Height (mm / in): | 1236 / 48.7 | 1166 / 45.9 |
| Weight (kg / lb): | 1521 / 3353 | 1245 / 2745 |
| Front suspension: | independent, short/long arm double wishbone, cast aluminum controls, transverse-mounted composite leaf spring, monotube shock absorbers, anti-roll bar | independent, short/long double wishbone, fabricated steel upper & lower, machined aluminum knuckle, coil-over multi-adjustable shock absorbers, anti-roll bar |
| Rear suspension: | independent, short/long arm double wishbone, cast aluminum control arms, transverse-mounted composite leaf spring, monotube shock absorbers; anti-roll bar | independent, short/long arm double wishbone, steel fabricated upper & lower control arms, machined aluminum knuckle, coil-over multi-adjustable shock absorbers, anti-roll bar |
| Brakes: | front and rear power-assisted carbon-ceramic disc with 6-piston front and 4-piston rear calipers, cross-drilled rotors, ABS | 4-wheel disc with monoblock calipers, steel rotors and ceramic composite pads |
| Wheels (in): | 19 x 10 (front); 20 x 12 (rear) | 18 x 12.5 (front); 18 x 13 (rear) |
| Tires: | Michelin Pilot Sport 2, P285/30ZR19 (front), P335/25ZR20 (rear) |
Michelin racing tires, 30/68-18 (front), 31/71-18 (rear) |
| Fuel capacity (L / gal): | 68.1 / 18 | 90 / 23.77 (E10) 110 / 29 (E85) |
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