Ferrari Dino 308 GT4 group 5 (1974)

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2826 units built
Click here for 308 GT4/LM '74
Click here for street version

Group/Class 3 Homologation number: 3073
Years active 1976 Homologation start: 1/4/1976
Type Ferrari Dino F106 AL, V8 (90o) cyl, 4 stroke, petrol engine located transversly in the middle and in front of the rear axle
Capacity 2927 cc WRC: 2927 cc
Bore x Stroke (mm) 81.0 x 71.0
Compression ratio 10.0:1
Output power - torgue 300 HP / 8200 rpm 27.2 kgm (267 Nm) / 6000 rpm
Main bearings 5 of 63mm diameter connecting rod length between centers 137mm, big end bearing diameter 47mm
Materials block: aluminium alloy cylinderhead: aluminium alloy, 127mm height
Cams/valves 2 overhead camshafts (DOHC), beltdriven 2 valves per cyl - 16 valves total, 43mm inlet valve diameter, 37mm exhaust valve diameter. 22.5o angle between inlet valve axis and vertical, 22.5o angle between exhaust valve axis and vertical. 2 coil springs per inlet/exhaust valve
Aspiration naturally, 4 x dual Weber 40 DCNF carburetors
Ignition electronic, firing order 1-5-3-7-4-8-2-6
Cooling system watercooled
Lubrication system dry sump 2 oil coolers
Type rear wheel drive 5 speed gearbox
Gearbox ratios 1st: 3.418/1
2nd: 2.353/1
3rd: 1.693/1
4th: 1.244/1
5th: 0.952/1
R: 3.247/1
Diffrential ratio 3.706/1 (63/17) helical gears 50-75% limited slip rear differential
Clutch dry, single disk 241mm diameter
Type steel tubular chassis with roll-cage. 2 door coupe bodyshell made of fiberglass
Front suspension double wishbones with coil spring, adjustable telescopic gas shock absorber and anti-roll bar
Rear suspension double wishbones with coil spring, adjustable telescopic gas shock absorber and anti-roll bar
Steering system rack and pinion
Brakes ventilated disks all around dual circuit with servo
length: 4.460 m (175.6") width: 1.800 m (70.9") height: 1.210 m (47.6")
wheelbase: 2.550 m (100.4") front track: 1460 m (57.5") rear track: 1460 m (57.5")
Rims - tires Front: 8x15" and rear: 12x15" Front: 205/70 VR 14
Weight 1200 kg
Fuel tank
Drag coefficient 0.4

Results in WSCC

308 GT4
Car entry, chassis number Car number/ result
Monza Spa Nurb Imola Le Man Zeltweg Watkins Glen Le Castellet Brands Hatch Kyalami
Team 1000km 1000km 1000km 1000km 24h 1000km 6h 1000km 1000km 6h
North American Racing Team, 08020 group 5 #18, clutch
Starts/finishes 1/0 1/0
Driver Team entries and car number
North American Racing Team
Giancarlo Gagliardi 18
Jean-Louis Lafosse 18

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