Fox built Fireball Roberts' engine for the 1955 race on the
Daytona Beach Road Course. He started building the engine at 8:00 pm the night before the race and got done at 4:00 am. Roberts car qualified fourth and led every lap of the 160 lap event, winning by 1 minute and 14 seconds ahead of
Tim Flock. Fox opened his own engine shop after the season. Car owner
John Masoni approached Fox in 1960 to build a car for the
1960 Daytona 500, which would be driven by
Junior Johnson. Fox built the car in seven days. The car was about slower than the
Pontiac racecars in practice. While they were trying to figure out how to increase their speed, a
Cotton Owens' faster Pontiac racecar passed him. Johnson noticed that when he was able to keep up with Owens' car if he followed closely behind in its
slipstream. Johnson followed the Pontiac racecars in the race, pitting when they did. At the end,
Bobby Johns had the only Pontiac which was competing for the win. Johnson followed
Jack Smith's lapped Pontiac until Johns caught the duo and passed Johnson for the lead with 30 laps left in the race. Johns led the race until his rear window fell out with ten laps remaining. Johns recovered to finish second, 23 seconds behind Johnson. The practice of "
drafting" has become a common tactic among NASCAR drivers on high speed tracks. Rookie
David Pearson won three races that season in a Ray Fox-prepared
Pontiac.
Car owner Fox began owning his own car starting in 1962. Drivers to race in Fox's car include
Buck Baker,
Buddy Baker,
Darel Dieringer,
Junior Johnson,
Fred Lorenzen,
Fireball Roberts,
Cale Yarborough, and
LeeRoy Yarbrough. In 1965, LeeRoy Yarbrough drove a Fox-prepared
Dodge Coronet racecar to a new closed-course world speed record at . He set the record on the second lap and he was increasing speed on the third lap when the car began smoking. NASCAR black flagged the car and Yarbrough slowed down. When he arrived in the pits, the pit crew found a bolt in the tire. The bolt easily could have caused a flat tire, which could have been deadly at high speed. In the late 1960s, Fox bought
Holman Moody's shop at the
Charlotte airport. Fox retired in 1972, selling the company to his son Ray Fox Jr. ==NASCAR inspector==