Longest wheelbase of all the cars. Very stable and forgiving; must be driven very hard to go quickly, but forgiving characteristics permit this. Heavier than the four lightweights, with CG fairly far forward.

Engine is down on power but very nice to drive. High aerodynamic drag.

EASY RIDE setup hints:

Tires 20 psi all around

0.5 bump rubbers

Toe-in +0.025 front, +0.075 rear

Camber -0.5 front, -0.25 rear

Dif.: 85/30 ramp angles, 4 clutches

Steering 15:1

Wheel rate 80 front, 120 rear

Ride height 3.5 or 3.75

Dampers, front 2 bump 3 rebound, rear 2 or 3 bump 3 rebound

Anti-roll bars around 140 front, 120 rear

Front brake bias 56%

Measurements:

Weight: 558 kg

On Rear Wheels: 60%

Wheel-base: 2489 mm

Front Track: 1511 mm

Rear Track: 1511 mm

Track/Wheelbase Ratio: 1.64:1

Chassis Ride Height: 10 cm

Engine power: 390 bhp @ 9700 rpm

Engine torque: 292 Nm @ 8700 rpm

Cooper was a two car/two driver team team (Rindt and Rodriguez), with the exception of the British GP when a third car was entered, a T81 driven by Alan Rees.

Rodriguez was out for three GPs due to injury. He was replaced by Dick Attwood, then Jackie Ickx.

The original GPL makes Cooper a three car team, by including Ickx with Rindt and Rodriguez.

The Cooper was also used by drivers in a number of privately entered teams. Appearing the most regularly were Jo Siffert with Rob Walker's team and Jo Bonnier with his own team. This is accurately reflected in the original GPL.

Cooper cars in GPL:

The team started the season with the previous season's Cooper-Maserati T-81s, powered by Maserati 3-litre V-12 24-valve engines.

The T-81B, the 1967 version of the T-81 (lightened and with a different gearbox), was introduced at Monaco.

The T-86, introduced at Silverstone, was lightened still further and fitted with a Maserati 36-valve V-12 engine.

From Monza on, the T-81B was also fitted with the 36-valve engine. A modified 36-plug engine was fitted to the T86 at Watkins Glen, and this engine was also fitted in the T-81B raced at Mexico City.

Rees used T81 F1-3-66 at the British GP, entry number 14.

Guy Ligier used F1-4-66 (ex F1-7-66) for two GPs in 1967 (see Brabham page).

The Cooper modelled in GPL physics is the T-81B with the 36-valve engine.