Cooper T67

Cooper T67

1963 Mk3A/Mk4.
Original Specification
Wheelbase  7″ 6″
Track  4″3″ front, 4″3″ rear
Engine  BMC-XSP. 71.5mm bore x 68.2 stroke, capacity 1098cc.
Dry sump. Single twin-choke Weber carburettor.
Gearbox Citroen-ERSA 6 speed. Rotoflex fixed length, or sliding spline drive shafts.
Wheels  13″ cast magnesium.
Brakes 9.25/9.00″ discs.

The Hydrolastic suspension having proved unsatisfactory on the T65 prototype testing the brackets were quickly revised and the production run of T67s cars had coil springs.

For this last European season of Formula Junior Cooper produced a strikingly low and narrow design similar to the previous years Formula 1 car.
The pencil slim body included a large opening in the tail end, the chassis incorporated anti-dive & anti-squat suspension with a new style of cast magnesium rear upright together with an additional link arm, adjustable via Rose joints.
With the formula drawing to a close, sales figures dropped to about half of the previous year and of these only a few cars had the standard BMC engine. A significant number of customers specified the now popular Ford engine and a similar number opted to have their cars delivered without any engine.
Jack Knight somehow managed to fit 6 speeds into the much modified Citroen-ERSA gearbox to compete with the, now almost industry standard, Hewland.
The result of all of this sophistication produced a fast car, and Peter Revson, heir to the Revlon cosmetics fortune, achieved the fastest ever recorded race lap speed for any Formula Junior car with a 130.50 mph lap of Enna-Pergusa.
Kurt Bardi-Barry opened the account for this model with a win at Vallelunga followed a week later when the future Formula 1 star Jochen Mass won at Cessenatico. Unfortunately, this promising start did not herald a spectacular season for the model, with just less than 20 race wins across the world.
However one man, Kurt Ahrens, notched up an astonishing 9 of these, including once at Budapest in front of an estimated 75,000 spectators.
Jean-Claude Franck won with his car at the Brenau circuit near Berlin, which actually involved a section of autobahn carriageways and even part of the slip entry/exit junction system !.
Peter and Doug Revson each bought a car and Peter won and led home 4 other Coopers at the Roskilde circuit in Denmark.
The “twins” had moved on, so Tyrrell had some new faces in his works team cars:-
John Rhodes and Peter Proctor were the regulars, relieved on occasion by Tim Mayer and also by Jose Rosinski who won at Magny Cours.
The Ahrens car, both of the Revson cars and Francks’ car are amongst the ten cars known today.