[winders]

Originally Posted by TCracingCA

Thus because of the rules (and I will only take a small segment of the Porsche history): 1971 The "S" was the car. LeMans and FIA developed rules for Turbos, so Porsche fielded Turbos in the 911, and would build RS's and then RSR's, the IROC cars, and the 911 Turbo cars were essentially cutting edge which caused some rule tweaking and thus caught them out for a few years during the RS and RSR reign! But then that all evolved to the hybrid in between 934, and then eventually the 935 here in the states was finally greenlighted for competition late 1977, but formally for the 1978 season, but had FIA classes in 1976 in Europe and onward thru the dominating late 70's and into the 80's, and actually earlier starting with those first Turbo 911's, but due to the rule mods on fuel consumption etc.

I am not even sure what you are saying here. It's too convoluted to make sense of. The first 911 race car with a Turbo was the 934 which debuted in late 1975.