David S. Wallens wrote:
We did a similar piece a year or so ago on professional street stock racing which basically covered a parallel trail: Showroom Stock to Playboy Endurance Series to Escort Endurance Series to Firehawk to (eventually) Koni and today's Continental Tire Challenge series.
AFAIK:
Showroom Stock, Playboy, and Escort were all SCCA sanctioned. Endurance versions of today's SCCA Pro Racing World Challenge.
Firehawk was IMSA sanctioned.
As far as I can tell, Motorola Cup in Canada was the start of CTC. Looks like Grand Am bought the Motorola cup and changed it's name to Grand Am Cup, then Koni Challenge Series, then Koni Sports Car Challenge, then Continental Tire Sports Car Challenge as of 2010.