Wind tunnel testing showed that the shape was aerodynamically efficient but would benefit from a few enhancements suggested by Max Schenkel, an aerodynamicist at General Motors who also served as a staff engineer on the Aerotech project.

Welburn had originally wanted the car to have faired-in wheel wells but Goodyear engineers working with Oldsmobile had concerns about excessive heat buildup in the covered space.

Welburn's original design incorporated a long tail inspired by the Porsche 917LH, which ran counter to Louckes' plan for setting a closed-course record on the Indianapolis Motor Speedway.

Construction of the first car was completed by the end of 1986, and was tested by Foyt at the General Motors proving grounds at Mesa, Arizona.

After successful runs at the General Motors proving grounds, the development team decided to test Welburn's long-tail design as well.

Under this scheme the derivative engines had to keep the Quad 4's four-stroke combustion cycle, double overhead cams, multi-valve cylinder head and, significantly, 100 mm (3.94 in) bore spacing.

The long-tail version proved to be even more capable than its short-tail sibling, allowing Foyt to reach a top speed of 275 mph (443 km/h) in the flying mile after some practice runs.

[1] Foyt set a new speed record with the long-tail version the next day, averaging 267.399 mph (430.337 km/h) after flying-mile runs in both directions of the track.

Between December 7 and 15, 1992, a third Aerotech was built, and the two earlier cars were brought out of storage and made ready to run with the addition of functional lights.

[1] Released in 1989, the Aerotech II is a wagon-back sports coupe concept with a 2.3-liter Quad 4 making 230 hp (170 kW) that made its debut at the North American International Auto Show in Detroit.

Built by Bird Engineering, the karts have steel tubular chassis with fiberglass bodies painted two-tone silver with red accents.

Power goes from a 3 hp (2.2 kW) Briggs & Stratton single-cylinder engine through a centrifugal clutch and drive chain to 6 in (150 mm) wheels.