With the growth of GT racing in the 1990s, Porsche revived the RSR moniker with the 964 Carrera RSR. and developed a race car to take part in national championship series in Europe, Japan, and United States such as the 24-Hours of Le Mans, Daytona and Spa. Customers and privateers were able to choose between three distinct factory-built 3.8-liter engines, each tuned to a different specification dependent on the appropriate class of competition. Standard equipment included a full welded Matter roll cage, an aluminum front hood, front strut brace, fully ball-jointed suspension at the front and rear, two-way adjustable Bilstein suspension, a deeper front spoiler with upturned edges and an adjustable rear wing with integrated intake ducts, bolted-on fender flares, a single racing seat and harness, battery switch and a fire extinguishing system.
The 993 RSR was powered by a M64/75 type engine. The engine block was that of the 993 3.8 RS model but fitted with special barrels and pistons that had deeper valve pockets to accomodate the high lift RSR cams. Lighter valves with thinner valve stems were implemented with stronger valve springs to accommodate the higher red line of 6900 rpm. The inlet plenum and exhaust manifolds were completely redesigned and mated to six individual throttle bodies. Power was delivered through a single-mass flywheel and a 6-speed Type G50/30 manual gearbox reworked specifically for the RSR.
More information coming soon.
One of 30 993 Cup RSR produced for the 1997 racing season
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