Steve Horne, the president of Truesports, commissioned the project in 1989 to develop the first "Made in America" Indy car since the 1986 Eagle,[3] with a design team led by chief engineer Don Halliday and aerodynamicist Gary Grossenbacher.

[4] During the 1991 season, Pruett qualified within the top 10 in 13 out of 17 races, and earned 67 points en route to 10th place in the championship.

The outfit entered 9 races with rookie Brian Till and scored 8 points, but did not continue onto the 1993 season.

[6] The 92C showed potential during the early season, with Pruett finished 7th at Phoenix and qualifying 3rd at Long Beach.

Now in the black-and-yellow Miller livery, the chassis was tested in November 1992 at Phoenix International Raceway,[9] suffering a crash in the process.

[11] Groff, who was originally slated to begin his racing season after the Indianapolis 500,[11] nonetheless appeared in official practice during the month of May, sharing the R/H-001 with Rahal.

Both R/H-001 cars struggled to get up to speed during practice, and Rahal waved off his first qualification attempt on May 15 after a lap of 214.179 mph.

Rahal subsequently attempted to qualify his spare car in the final moments of Bump Day, but came up short with an average of 216.342 mph.

[11] Rahal originally intended to introduce an all-new design, the R/H-002, in June; however, this project was cancelled following the team's failure to qualify for the 1993 Indianapolis 500.