1963 Mk4, T65 / 1963 Mk3A, T67
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. Fixed length drive shafts.
Wheels 13” cast magnesium.
Brakes 9” discs.
For this last 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 and the driving position was near horizontal.
The first chassis was built with Hydrolastic suspension units but after trials this system was found to be unsatisfactory so this car and all the production cars had conventional coil springs.
The chassis was constructed in part from smaller diameter tubes than hitherto and incorporated anti-dive front & anti-squat rear wishdones.
A new style of cast magnesium upright was used at the rear together with an additional link arm, adjustable via Rose joints as was much of the suspension.
With the formula drawing to a close, production figures dropped to about half of the previous year and of these only a few had the standard BMC engine. However a significant number specified the now popular Ford engine and a similar number opted to have their cars delivered without any engine.
Jack Knight 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 lap speed for any Formula Junior car with a 130mph lap at 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 Revson 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 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.
Whilst at home wins were harder to come by this season but John Taylor won for Gerrard Racing at Mallory two weekends on the trot.
The ex Hydrolastic and the Revson car are amongst the 8 cars known today.
1963 Cooper FJ Mk4 T65
Peter Revson T67, Sweden