The Callaway Corvette
Sledgehammer was a project by tuner Reeves Callaway
to build a corvette that would demonstrate his skill
and ability in building high performance cars. The car started out as a stock 1988 Chevrolet
Corvette, light grey in color
. First, a body kit was installed to increase the aerodynamic
efficiency of the car to help it achieve a higher top speed and provide for more stable
handling at 200+ mph. The internals of the engine
were built up, a dry sump oil system with coolers
was installed, and of course, massive brakes
went on. Next, the twin turbos went on at 22 PSI
with custom built headers and exhaust. The tires used were Goodyear
ZR40 Gatorbacks, however were custom made with a different rubber
compound and shaved
to prevent heat buildup.
When completed, the car put out 898 HP. The car was to be tested on an oval track for a top speed run, with some anticipation. It topped out at 254.76 mph. For some perspective, this is a higher top speed than any street legal exotic you can buy to date, and the sledgehammer was built 12 years ago.
What really makes it impressive is that the car was driven to the track from Connecticut to Ohio, partially through the rain, never trailered. It also featured a full interior with leather seats, power windows and door locks, air conditioning, and full stereo. It also included all stock sound deadening, providing for a rather quiet ride for a car of this class (louder than stock of course). Callaway thought he could produce and sell these cars for $400,000 however none beyond the prototype were every produced.