machined
them with new, sharp tools, then selected the best and sent them down the
Flint assembly line. These engines produced 290hp ±1.5%, compared to the stock
235hp L98.
Unlike the B9P Corvette Challenge cars, which were equipped
with rollcages, racing seats and harnesses, fire systems and racing exhaust
by contractors Protofab and Powell Motorsports, purchasers of an R9G had to
turn this factory stock machine into a race car on their own. But most of
the teams that bought the R9G had plenty of racing experience, either in the
Escort Endurance series or the Corvette Challenge.
The R9G package was not advertised to the public, but the
major Corvette teams like Kim Baker,
Doug Rippie, and Tommy Morrison certainly
knew about the car and built their World Challenge efforts around them. Only
23 R9G cars were built in 1990, and Chevrolet discontinued the package after
that year. Chevrolet also pulled the plug on direct support of any World Challenge
team, so possibly that is why some of the 23 R9G
