1965 Ford GT40 Mark II Prototype


1965 Ford GT40 Mark II Prototype

1965 Ford GT40 Mark II Prototype

During the 1965 24 Hours of LeMans, Ford received much attention for two large-displacement GT40s entered in the race. These two prototypes were prepared by Kar Kraft, a subsidiary of Ford run by Roy Lunn. They chopped up the GT40 chassis to accept the 427 CID Galaxie engine. Unfortunately, development time on these cars was short and the decision to run them at Le Mans was unexpected.

The initial performance of the 427 GT40 was promising. The car could reach 210 mph down the Mulsanne straight and qualified almost ten seconds faster than any Ferrari. During the opening hours of the race, prototype GT40s were in the lead. Unfortunately transmission problems arose, retiring both cars. Afterwards, it was clear that the 427 GT40 would be the car to race and a more robust transmission was necessary to make the distance.

The 1965 car left many problems which Kar Kraft could not have reversed during their short development time. Although the car was basically the same as the Mark I it had several hundred additional pounds of reinforcing and a longer nose which interfered with aerodynamics. Even though these problems arose, it was decided that the relatively cheap, NASCAR-proven 427 would power the 1966 Mark Two GT40.

Both cars chassis GT/106 and GT/107 were disassembled for their component pieces after Le Mans.

1965 Ford GT40 Mark II Prototype

1965 Ford GT40 Mark II Prototype

In Detail

submitted by Richard Owen
type Racing Car
built at Slough, England
production 2
engine Galaxie Watre-Cooled, 90 Degree V8 w/Dry Sump Lubrication
position Mid-Longitudinal
aspiration Natural
valvetrain 2 Valves per Cyl, Pushrod Actuated
fuel feed Holley 780cfm 4-Barrel Carburetor
displacement 6997 cc / 427.0 in³
bore 108 mm / 4.25 in
stroke 96 mm / 3.78 in
compression 10.5:1
power 361.7 kw / 485.0 bhp @ 6200 rpm
specific output 69.32 bhp per litre
bhp/weight 436.54 bhp per tonne
torque 644.01 nm / 475.0 ft lbs @ 5000 rpm
redline 7400
body / frame Fibreglass Body over Sheet-Steel Semi-Monocoque w/Square Tube Stiffening
driven wheels RWD w/LSD
front tires 9.75×15
rear tires 12.80×15
front brakes Girling Vented Dicsc
rear brakes Girling Vented Dicsc
front wheels F 38.1 x 20.3 cm / 15.0 x 8.0 in
rear wheels R 38.1 x 24.1 cm / 15.0 x 9.5 in
steering Rack & Pinion
f suspension Double Wishbones w/Coil Springs, Tube Shocks, Anti-Roll Bar
r suspension Transverse Top Link w/Lower Wishbone, Trailing Arms, Coil Springs, Anti-Roll Bar
curb weight 1111 kg / 2450 lbs
wheelbase 2413 mm / 95.0 in
front track 1448 mm / 57.0 in
rear track 1448 mm / 57.0 in
length 4140 mm / 163.0 in
width 1778 mm / 70.0 in
height 1028 mm / 40.5 in
transmission Ford T44 4-Speed Manual modified by Kar Kraft or ZF 5DS-25 5-Speed Manual
gear ratios 2.22:1, 1.43:1, 1.19:1, 1.00:1
final drive 2.77:1
top speed ~337.89 kph / 210 mph