Background
The winged Mopars first appeared in 1969 with the Dodge Charger Daytona, carrying streamlining and aerodynamic downforce to new heights in NASCAR.
The 1969 regulations required that Dodge build only 500 of the pointy-nose high-wing Daytonas.
When Plymouth decided to emulate the success of the Daytona with the Road Runner Superbird in 1970 NASCAR made it quite a bit more difficult, requiring that any model raced in NASCAR be built in sufficient quantities to supply all the manufacturer's U.S. dealers.
For Plymouth that meant building nearly 2,000 of its bullet-shaped NASCAR Superbirds, just to qualify them for racing on NASCAR's two high speed ovals, Daytona and Talladega.
The concept was defined and the benefits were clear: "Win on Sunday, sell on Monday."
A competitive Plymouth also would bring Petty Enterprises back to the Plymouth family.
As a racer Richard wanted a competitive car to drive. As a businessman he wanted the Plymouth competition parts distribution franchise.
He got both.
Then Pete Hamilton, driving a Petty Enterprises Plymouth Road Runner Superbird, won the season-opening Daytona 500.
Even though the Dodge Charger and Plymouth Road Runner were built on the same mid-sized Chrysler platform, the bodywork was substantially different. Plymouth was forced to develop its own variation on the extended-nose, raised-wing Charger concept.
The Superbird's nose was 1" longer than the Charger's and had a raised entry angle. The rear wing stood on supports with a much deeper rake which swept back farther and inclined gently toward the body's centre-line.
Engineering afficionados sometimes ask what kind of aerodynamic research the designers at Plymouth did to arrive at the ideal placement height for the rear wing.
The answer is simple: they didn't do any.
They just made sure it was high enough to allow the boot lid to open without banging into the wing.
NASCAR teams, on the other hand, experimented with chin spoiler placement and wing angle of attack to achieve delicately balanced aerodynamic performance in the different track settings and speeds.
The Road Runner Superbird became the most popular and well known of all the NASCAR specials built during the Sixties and Seventies, helped in no small measure by NASCAR's insistence that Plymouth build plenty of them so they created a high profile on the street.
Most of the street Superbirds are very well equipped with luxury and convenience options in addition to the performance equipment which was included in the Superbird package.
Those included the 375hp 440cu in V8, Torqueflite automatic transmission, performance axle, power steering, power disc brakes and hood hold down pins. A black vinyl covered roof also was standard.








