August 5, 2018

Serious Challenges Confront the Callaway Team at the Nürburgring

Nevertheless, Callaway Competition Retains Drivers’ Championship Points Lead

The Callaway team of Marvin Kirchhöfer and Daniel Keilwitz faced more than their share of troubles at the Nürburgring this weekend. After qualifying seventh for Saturday’s Race 1, the Corvette C7 GT3-R was engulfed in a chaotic Lap One. In Turn One, contact with the Team ISR Audi R8 of Filip Salaquarda and Frank Stippler resulted in a drive-through penalty and ultimately put the Callaway team out of the race.

In Sunday’s Race 2, Keilwitz advanced from tenth to third in just 14 laps. Then a faulty alternator resulted in the second DNF of the weekend. Despite their misfortunes and with no points awarded for the weekend, Kirchhöfer and Keilwitz remain in first place in the Drivers’ Championship standings and the Callaway team slipped only to second place in Teams’ Championship points.

More ADAC GT Masters race details to follow . . .


ADAC GT Masters
Nürburgring, Nürburg Germany
Race #1 ADAC GT Masters YouTube Video: Saturday, August 4
Race #2 ADAC GT Masters YouTube Video: Sunday, August 5


ADAC GT Masters
Circuit Zandvoort, Zandvoort, The Netherlands
Race #1: Saturday, August 18
Race #2: Sunday, August 19

Callaway Corvette C7 GT3-R #1

Callaway Competition: An International Effort

  • Commercially available race cars for FIA GT3 competition worldwide.
  • Designed, constructed and homologated by Callaway Competition GmbH, under exclusive authorization by Chevrolet Division, GM.
  • Configurable for all GT3 racing series.
  • Incorporates experience gained by Callaway Competition GmbH during 20+ years of international sports car racing.

Motorsports has always played a crucial role at Callaway. The marque possesses a legendary record at many of the world’s great race tracks: Spa, Suzuka, Paul Ricard, Nurburgring Nordschleife and GP courses, Monza, Vallelunga, Hockeheim, Daytona, Lime Rock, Road Atlanta, Sears Point, Laguna Seca, Charlotte, Texas World Speedway, Watkins Glen and Mugello.

Currently, Callaway Competition – Germany campaigns its own GT3 race team and sells Corvette GT3 race cars and support parts and equipment to leading race teams throughout Europe. Since GM has expanded Callaway’s exclusive authorization to homologate, construct and sell Corvette GT3 race cars worldwide, including North America, a new organization, Callaway Competition – USA, also constructs and sells the Corvette race cars.

The first Callaway Corvette C7 GT3-R’s were constructed by Callaway Competition in Leingarten Germany, setting new standards in the league of GT3 race cars. Development of the Callaway Corvette C7 GT3-R began in mid-2014 on CAD, under the supervision of Ernst Wöhr and Giovanni Ciccone, with technically-relevant parts designed by Mike Gramke and Uwe Hoffmann.

The body and dashboard were CAD-designed by Paul Deutschman, Callaway’s designer of over 30 years, of Deutschman Design – Montreal, Canada. By the end of 2014, vehicle design was established and, in the spring of 2015, prototype construction commenced at Callaway’s German facility.

Callaway Competition supplied dimensional data for specialist suppliers who milled forms for body parts. The carbon fiber parts from these forms were chiefly manufactured in Leingarten, with some produced by friendly firms.

The only stock components retained from the Corvette C7 are the chassis, which is reinforced with the roll cage, the lower control arms, the upper half of the rear bumper and the tail lights. The naturally aspirated 6.2-liter engine was carried over from the Callaway Corvette Z06.R GT3 with minor changes. Other parts were newly developed and manufactured, with the major part of the technical components from aluminum and carbon fiber hand-built in Leingarten.

The front spoiler, diffuser and rear wing aerodynamic components were developed and implemented in CAD (Paul Schreiber and Alex Koppe). The shape and the profile of the rear wing corresponds to all the latest developments in aerodynamics.

Callaway Competition General Manager Ernst Wöhr and Team Manager Giovanni Ciccone utilized all their race car building experience in the construction of the Corvette C7 GT3-R.



  • 6.2L, 381 cid LS-series aluminum V8, 4.060” x 3.625” bore and stroke
  • Engine management mapped for 98 (RON) octane unleaded fuel
  • 540 to 600 bhp and 470 to 500 lb-ft torque, depending on intake restrictor
  • Dry sump lubrication system, 14 L capacity, with quick fill capability and oil level sensor
  • Bosch electronic engine management, with multi-point sequential port injection
  • Drive-by-wire throttle actuation
  • Motorsport-spec engine wiring harness
  • Stainless steel exhaust system with tri-y headers, side pipe mufflers, catalytic converters


  • Rear-mounted X-Trac 6 speed sequential gearbox, MEGA-line paddle shift actuator
  • Sachs racing clutch
  • Gearbox-mounted starter, clutch and alternator
  • Plate and viscous coupling differential
  • Carbon propeller shaft
  • Tripod joint halfshafts
  • Transaxle cooling system

Driver Support Equipment

  • Bosch Racing Anti Lock braking system, adjustable
  • Bosch Traction Control, adjustable
  • MEGA-line paddle shift system
  • Adjustable power steering assistance
  • Multi-function steering wheel
  • Pit speed monitoring functionality
  • Launch control system
  • Pit timing system
driver support


  • Brembo Endurance 6-piston front and 4-piston rear calipers, CNC-machined, with titanium pistons and radiators
  • Brembo Endurance brake discs, 390mm/330mm diameter, grooved and ventilated
  • Driver adjustable pedal box
  • Driver adjustable brake bias
  • Front and rear brake cooling ducts
gt3-r brakes

Chassis and Suspension

  • Reinforced aluminum chassis, with integrated carbon panels
  • Steel safety cage, constructed to FIA specifications
  • 120 L (31.7 gal) FIA-FT3 fuel cell, spare fuel pump, low fuel level indicator
  • Pneumatic jack system (optional LH or RH side)
  • Integrated fuel filler into the rear brake cooling duct
  • Low friction, rose-jointed, independent double wishbone configuration, front and rear
  • Adjustable ride height, camber, toe, rollcenter
  • Machined aluminum uprights
  • Central wheel locking system
  • Coil-over springs, adjustable Bilstein racing dampers, integrated ride height adjustment
  • Adjustable front and rear anti-roll bars
fuel filler
suspension dwg


  • C7 GT3-R body configured for optimum airflow management without road car constraints
  • CAD-designed carbon composite body panels utilizing advanced air management software
  • Fender and hood louvers and extractors
  • Flat underbody and efficient rear diffuser
  • Increased front splitter surface area
  • Adjustable rear wing
  • Integrated side-exit exhaust system

Interior and Safety

  • FIA integrated steel roll cage, with provision for lifting device
  • Driver side door with integrated impact structure
  • FIA Roof-Rescue hatch
  • Quick release doors and door windows
  • FIA-homologated, Racetech advanced racing seat with six-point racing harness
  • Adjustable pedal box and steering wheel position
  • Bosch multi-color trans-reflective dashboard display
  • Backlighted touch panel for electronic controls
  • Motorsport-spec wiring harness
  • Firesense zero360 fire extinguisher system


  • OZ forged aluminum, center lock attachment
  • Front 18” x 12.5”, with 315/680-18 tires
  • Rear 18” x 13”, with 325/705-18 tires

Data Acquisition

  • Bosch Motorsport Data Logger
  • 720 channels, 1 GB memory, up to 1000Hz sampling rate
  • High speed Ethernet download capable
  • WinDarab 7 Light datalogging software
  • GPS based lap timing
  • Sensors include (standard package):
    • Wheel speed FL
    • Wheel speed FR
    • Wheel speed RL
    • Wheel speed RR
    • Brake pressure front
    • Brake pressure rear
    • Brake pressure FL
    • Brake pressure FR
    • Brake pressure RL
    • Brake pressure RR
    • Clutch pressure
    • X/Y acceleration
    • Yaw rate
    • Steering angle
    • Gearbox temperature
    • Oil tank level
    • Low fuel level switch
    • GPS
data acquisition


  • Driver Comfort / Features
    • Large seat option
    • Active seat cooling
    • Active helmet cooling
    • Off-the-jack start

  • Endurance Lighting
    • Additional headlights

  • VLN Kit
    • VLN-type refueling system
    • VLN-type exhaust system
    • Speed limiters
    • Anti-lift strategy
    • Restrictor mapping

  • Service / Maintenance
    • Quick fill bottle, water
    • Quick fill bottle, engine oil
    • Quick fill bottle, gearbox oil
    • Gearbox tooling kit
    • Set-up equipment

  • Additional Data Acquisition
    • WinDarab 7 Expert software
    • Removable USB data storage
    • Damper displacement kit
    • Tire pressure monitoring system
    • Radar-based collision avoidance
    • CAN bus integrated video system
    • Advanced telemetry
    • Sensors on request
roof hatch

For more information regarding pricing, availability, factory race support or any other Corvette C7 GT3-R details, please email Callaway Cars at or call (860) 434-9002.