Ford GT40 group 4 (1966)
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At Le Mans '68: see video

Chassis numbers here and here

Chassis build

Specifications

107 units built
Homologation number: 224
Homologation start: 1/2/1966
Click here for GT40P/1075 spec sheet
Click here for 1964 indy
Click here and here and here for 1965 289
Click here and here for 1965 289 street version
Click here and here for 1968

early prototypes engine
Ford Small Block AX230-2, 255 indy, V8 (90o) cyl, 4 stroke petrol of methanol (Indy) engine, located middle longitudinally
4177cc, 95.5 x 72.9 mm
375 BHP @ 7200 RPM
12.5:1
sand cast aluminium alloy block
side camshaft with overhead valves (OHV), 2 valves / cyl - 16 valves total
Fuel System: Hilborn Modified Ford Continuous Mechanical fuel Injection
Engine Oil: SAE #50
Dry Sump
Oil Pressure: 100 psi
Dry Weight: 400 lbs (181.6 kg)
Firing Order: 1-5-4-2-6-3-7-8
Ignition: Autolite Ford Brakerless-Transistorized
Maximum Spark Advance: 47° @ 2,000 rpm
Generator: 10 amp Autolite
Water Pump Impeller Material: SAE G-3500 cast iron (from 1967, earlier Aluminium)
Crankshaft: Forged Steel (originally designed for the GT40)
Connecting Rods: Forged SAE 4340, AMS 6414
Connecting Rod Bolts Diameter: 0.4375 in/11.1125 mm (from 1967, before 0.40625 in/10.31875 mm)
Piston Pin Retainer: Stainless Steel
Cylinder Head Valve Guide Material: Fine Grain Cast Iron (from 1967, earlier Aluminium-Bronze Alloy)
Front Cover Casting: Aluminium (from 1967, earlier Magnesium)
Battery: Autolite 12V

Ford Small Block 289K, V8 (90o) cyl, 4 stroke petrol engine, located middle longitudinally
4736cc, 101.7 x 72.9 mm
10.0:1
287.1 kw / 385.0 bhp @ 7000 rpm, 1968: 425 bhp / 317 KW @ 6000 rpm at 10.6:1
423.02 nm / 312 ft lbs @ 5000 rpm, 1968: 540 Nm / 398 ft lbs @ 4750 rpm
cast iron block, aluminium head
side camshaft with overhead valves (OHV), 2 valves / cyl - 16 valves total. 45.3mm intake valves, and 36.75mm exhaust valves
aspiration, natural with 4 x Weber 48 IDA Carburetors
spark plugs Autolite BF-42, Firing Order: 1-5-4-2-6-3-7-8

Chassis GT40P/1075 '68
Ford Small Block 302, V8 (90o) cyl, 4 stroke petrol engine, located middle longitudinally
4942cc, 101.6 x 76.2 mm
520 bhp / 388 KW @ 7800 rpm
cast iron block, aluminium head
side camshaft with overhead valves (OHV), 2 valves / cyl - 16 valves total. 47.6mm inlet valve diameter, 41mm exhaust valve diameter
aspiration, natural with 4 x Weber 48 IDA Carburetors
spark plugs Autolite BF-42, Firing Order: 1-5-4-2-6-3-7-8

Kar Kraft-Modified Colotti Type 37, 4 speed gearbox
1st: 2.50/1
2nd: 1.70/1
3rd: 1.29/1
4th: 1.00/1
final drive, 3.09/1 to 3.55/1

ZF 5DS-25, 5 speed gearbox for 302 engine and GT/111, GT/112 chassis. Click here
1st: 2.42/1
2nd: 1.47/1
3rd: 1.14/1 or 1.09/1
4th: 1.00/1 or 0.96/1
5th: 0.846

1st: 2.231/1 (29/13)
2nd: 1.611/1 (29/18)
3rd: 1.23//1 (26/21)
4th: 1.000/1 (23/23)
5th: 0.808 (21/26)
final drive, 3.444/1 (31/9), 4.22/1
dry triple plate 184mm diameter clutch
steel semi-monocoque chassis with front and rear subframes, fibreglass body panels
Front suspension double a-frames, coil springs, anti-roll bar
Rear suspension double trailing links, lower inverted a-frame, upper transverse link, coil springs, anti-roll bar
rack-and-pinion steering
Girling ventilated discs 292mm diameter, all-round
Length: 4040 mm / 159.1 in, 1965: 4191 mm / 165 in, 1968: 4178 mm (164.5 in)
Width: 1778 mm / 70 in, 1968: 1905 mm (75 in)
Height: 1029 mm / 40.5 in
Wheelbase: 2413 mm / 95 in
Front track: 1372 mm / 54 in, 1968: 1460 mm (57.5 in)
Rear track: 1372 mm / 54 in, 1968: 1486 mm (58.5 in)
wheels, front 6.5 x 15", rear 8 x 15"
tires: front Goodyear Indy 6.00x16", rear Goodyear Indy 9.00x15", 1968: front 9.75x15", rear 12.8x15"
950-1000kg
fuel tank, 140 lt
drag coefficient, 0.39


Results in WSCC

Original engine Ford 289K
Running as Prototype
Season races for Prototypes
Car entry, chassis number Car number/ result
Sebring Targa Florio Consuma Nurb Rossfeld Le Man Reims Freiburg Tourist Trophy Sierra Montagna Brigde Hampton Paris
Team 12h Hill climb 1000km Hill climb 24h 12h Hill climb Hill climb 500km 1000km
Ford, GT/101 (Indy 255) in entry list
Ford, GT/102 (Indy 255) in entry list #140, suspe nsion #10, gear box #4, eng ine
Ford, GT/103 (Indy 255) #11, gear box #5, gear box
Ford, GT/104 (Indy 255) #12, fire
Ford, GT/105 #6, rear axle
Statistics
Works Starts/finishes 7/0 1/0 3/0 3/0
Drivers Team entries and car number
Ford
Phil Hill 140 10 4
Bruce McLaren 140 10 4
Richie Ginther 11 5
Masten Gregory 11 5
Richard Attwood 12 6
Jo Schlesser 12 6

ford-gt40-LM68-9.jpg Source
Pedro Rodriguez - Lucien Bianchi in Le Mans '68
1968%20Ford%20GT40%20Mk1%20Gulf_8.jpg Source
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Phil Hill - Bruce McLaren, chassis GT104 in Le Mans '64
Ford-GT40-1964.jpg Source
Chassis GT101
1967_Ford_GT40MarkIV22.jpg Source
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Drawings

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ford_gt40_mk_ii.jpg Source
ford_gt40_mk_1_1964.jpg Source
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Ford_GT40_cutaway_by_Shin_Yoshikawa.76182954_std.jpg Source
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