Two years after the introduction of the Porsche 930 street car marketed as the 911 Turbo Porsche manufactured a run of 400 Porsche 934 street cars mandated by a set of rules known as Group 4 in order that it’s customers could compete with a 550 hp race version of the 934 in 1976.

In 1977 Porsche built a further 10 white 934/5’s for it’s US customers who raced to the more liberal IMSA GTO series, aside from differences in the front and rear wheels arches and the rear wing which supplemented the tea tray spoiler the 934/5 was fitted with an intercooler which helped cool the combustion charge and raised the output to 600hp at 7000 rpm.

George Dyer took delivery of 934/5 #930 0954 in 1977 to supplement the non turbo charged 911 Carrera RSR which he had been racing since 1973 and co drove to victory in the 1977 Sebring 12 Hours with Brad Frisselle.

Records at RacingSportsCars.com show George raced the 934/5, which I believe to be today’s featured car, on nine occasions in 1977 with a win in the 250 mile Paul Revere race at Daytona being the cars stand out success.

Current owner Bruce Canepa raced #0954 once in 1978 finishing 7th at Sears Point before driving the car with Rick Mears and Monte Shelton to a third place finish in the 1979 Daytona 24 hours which seems to have been the cars final race appearance.

My thanks to Geoffrey Horton for arranging for me to share these photo’s of the car taken by Karl Krause at Niello Serrano Concours d’Elegance a couple of years ago.

Thanks for joining me on this “Intercooled IMSA GTO Racer” edition of “Gettin’ a li’l psycho on tyres” I hope you will join me again tomorrow when I’ll be looking at a Jaguar powered special that anticipated the arrival of the E-Type Jaguar. Don’t forget to come back now !