Looks like the bowtie brigade wants to face off with the blue oval in more than just IMSA’s GT class. Chevy today announced its newest road-racing Camaro, the race-only Camaro GT4.R, which will be eligible to race in professional sports cars series like the Continental Tire SportsCar Challenge (CTSC), Pirelli World Challenge (PWC), and other GT4-spec championships across the world. Based on the ZL1, the new GT4.R will have a race-prepped 6.2-liter LT1 V8 with an Xtrac six-speed sequential transmission and traction control.
Chevy technical partner Pratt & Miller—who also run the Corvette Racing C7.Rs at Le Mans and in IMSA competition—assisted in development of the GT4.R. The car has been built to GT4 specification, a class of cars used internationally in a number of series as well as stateside in CTSC’s GS class and in PWC’s GTS class [See below for more]. The GT4 rules allow sequential gearboxes, traction control, and aerodynamic devices. Chevy added two-way adjustable Ohlins dampers, an Xtrac limited-slip differential, six-piston Brembo calipers with adjustable anti-lock brakes, and new aero that includes a rear wing, front splitter, and dive planes to increase downforce. Engine sounds pretty healthy from this tease:
The Camaro GT4.R will likely debut in IMSA competition with Stevenson Motorsports in the Continental Tire SportsCar Challenge race at Sebring International Raceway in March. Stevenson raced a Camaro Z/28 for several years in CTSC, winning dozens of races and seven championships in the series. It will face the new Mustang GT4 in IMSA competition, as well as stout entries that include Porsche Cayman GT4s and McLaren 570S GT4s.
We’re not sure if the GT4.R will run in Pirelli World Challenge, but former Camaro Z/28 team Blackdog Speed Shop seems pretty excited about the new car, if its Facebook page is any indication.
The “GT4” specification denotes a competition specification for sports cars, as noted by the Stephane Ratel Organization (SRO). Rather than meeting specific performance targets like horsepower or weight, parity in GT4 is measured in a testing environment by a control driver with a target lap time. Based on the outcomes, adjustments are made with regard to power, weight, and other items. These cars include race versions based on mass-produced sports cars like the Mustang and Porsche Cayman as well as niche sports cars like the KTM X-Bow.
Generally speaking, GT4 is a specification used by some other sports car sanctioning bodies. In the United States, that includes the GS class of the IMSA Continental Tire SportsCar Challenge and GTS class of Pirelli World Challenge. The Nurburgring endurance series VLN also uses GT4-spec cars in its SP10 class and the Hankook 24H Series includes GT4-spec cars in its SP3 class. To confuse things further, GT4 is also a class name in some places (British GT Championship) and its own series (GT4 European Series).