This 1973 Porsche 914-based race car was acquired by the seller 36 years ago and previously campaigned in SCCA SP class. In 1997 the seller began to refresh the car, and ultimately redesigned it into a partially tube-framed racer with 993 GT1-style bodywork. The car is powered by a 993-sourced 3.6L flat-six paired with a Hewland DG300 5-speed manual transaxle. Other modifications include 993-based front and rear suspension, a center driving position, and more. This Porsche race car is offered with a 1998 article on the car from Excellence magazine, manuals for the PI Club Expert dash, a logbook, and a California bill of sale.

The fiberglass 993 GT1-style bodywork was custom made by QRS Fiberglass with design help from Randy Beck, son of Porsche replica builder Chuck Beck. A factory 911 roof was used to make a mold for the fiberglass roof, which incorporates a custom roof-mounted intake constructed using a Pro-Stock drag car hood scoop. The car measures 37″ tall overall, making it 2.5″ shorter than the 993 GT1 it is designed to emulate, and the complete bodywork weighs 110 pounds. The red finish is gel coat to save weight.

The wing is designed to replicate the 993 GT1 item, and was scaled up from a wing on a 1/43 scale model of the real car. The suspension hardware was sourced from a 993-generation 911, with the front and rear control arms mounted to the tubular chassis members. The car is equipped with 993 RSR-specification Bilstein Racing shock absorbers, and the seller reports that the rubber suspension bushings have been replaced with Mono-Ball spherical bearings.

An exterior walk-around video is viewable above. The three-piece BBS wheels measure 16″ in diameter and are 11.5″ wide at the front and 14″ wide at the rear. The seller reports that the car weighs 1,776 pounds in its current configuration with three gallons of fuel.

The remaining elements of the 914 tub are visible in the cockpit. The driver’s seat has been relocated for a centered driving position, and the fitted Tilton brake and clutch pedal system incorporates a brake bias adjuster. Protection is provided by a roll cage constructed from 1.5″ DOM tubing with .120″ wall thickness. The seller reports that both the harnesses and the fire suppression system were replaced in 2017.

A video showing engine startup and the functions of both the PI Club Expert digital dash and interior switch panel is shown above, and an exterior view of the engine starting is viewable here. The seller reports that the car has approximately 25 hours of run time on the current chassis, and less on the current engine.

The car was previously powered by a 2.8-liter 911 RSR engine and gearbox. It is currently equipped with an air-cooled 3.6L flat-six from a 1995 Porsche 911 which reportedly had 35k miles. A recent compression and leakdown test gave the following results:

Cylinder 1: 160 PSI, 4%

Cylinder 2: 150 PSI, 2%

Cylinder 3: 160 PSI, 4%

Cylinder 4: 150 PSI, 2%

Cylinder 5: 170 PSI, 5%

Cylinder 6: 160 PSI, 4%

Power is sent to the rear wheels via a 5-speed Hewland DG300 transaxle, which was rebuilt in October of 2005 and has had five hours of run time since. The fuel cell bladder was replaced in April 2019.

A tubular chassis extends both fore and aft from the 914 tub, and the seller reports that it is primarily constructed from 1.5″ chromoly tubing with wall thicknesses between .049″ and .095″ depending on load. Chassis Fabrication was handled by Bobbie Hart and the team at California Motorsports. Additional photos are provided showing the chassis with the bodywork removed.

A spare set of bodywork finished in white includes replacement doors and both front and rear clamshells. A set of narrower wheels are also included for easier transport.

A December 1998 article from Excellence magazine featuring the car is included, and describes the process that brought the car to its present configuration. The seller reports that when initially completed the car went 3 seconds per lap faster than it had previously with the same engine and gearbox. A photo of the car in its previous 914 bodywork is shown in the gallery below.

A video of the car at Streets of Willow demonstrating clutchless shifting is viewable above, and an additional video showing the car on-track is viewable below.

The seller of this car will make it available for viewing during the BaT Alumni Gathering at Laguna Seca on Saturday, August 17th. All are welcome to attend, meet the BaT Team, and hang out with the owners of more than 80 cars that were bought on BaT Auctions. We hope to see you there!