Ferrari 308 GTB group 4 (1976)
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Home » Rally Cars » Ferrari 308 GTB

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Specifications

2897 units built for GTB
494 units built for GTBi
748 units built for QV
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308 GTB QV, Group B, 1982+: Bosch K-Jetronic multipoint electronic fuel injection with 32valves head and 315HP/8000rpm

Group/Class 4 or B/12 Homologation number: 648, B 220 and B 236
Years active 1976-1980 Homologation start: 1/11/1976, 1/10/1982 and 1/1/1983
Engine
Type Ferrari Dino F106 A21, 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 10.5:1
Output power - torgue 270 - 290 HP / 8000 rpm 27.2 kgm (267 Nm) / 6000 rpm
with 25 kgm / 4000 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 or Kugelfischer multipoint mechanical fuel injection.
1983 (Group B): Bosch K-Jetronic electronic multipoint fuel injection
Ignition electronic, firing order 1-5-3-7-4-8-2-6
Cooling system watercooled
Lubrication system dry sump 2 oil coolers
Transmission
Type rear wheel drive 5 speed gearbox
Gearbox ratios 1st: 3.076/1 (40/13)
2nd: 2.117/1 (37/17)
3rd: 1.523/1 (32/21)
4th: 1.120/1 (28/25)
5th: 0.857/1 (24/28)
R: 2.953/1 (38/13)
Diffrential ratio 3.706/1 (63/17) helical gears 50-75% limited slip rear differential
Clutch dry, single disk 241mm diameter
Chassis-body
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
Dimensions
length: 4.230 m (166.5") width: 1.720 m (67.7") height: 1.100 m (43.3")
wheelbase: 2.340 m (92.1") front track: 1460 m (57.5") rear track: 1460 m (57.5")
Rims - tires Front: 8x15" and rear: 12x15" Front: 18/60-15 and rear: 29/61-15 (335/35).
Weight 1050 kg
Weight/power 3.75 kg/HP
Fuel tank

Results in WSCC

Season
Car entry Car number/ result
Daytona Mugello Silver stone Nurb Watkins Glen Mosport Brands Hatch Hocke nheim Valle lunga
Team 24h 6h 6h 1000km 6h 6h 6h 6h 6h
Felice Besenzoni/ Luciano Dal Ben, 20457 #14, in entry list
Statistics
Works Starts/finishes 0/0

Results in Endurance races

Group GTS-2
Car entry, chassis number Car number, result
Daytona Sebring Le Mans
Date 5/2 18/3 18/6
Duration 24h 12h 24h
Team\ Championship IMSA IMSA
Martino Finotto/ Ruggero Melgrati/ John Finger #80, intake manifold
Statistics
Works Starts/finishes 1/0 1/0

Results in WRC

Races

Season
Entry Rally event
Driver
Codriver
Team MC SVE
Entry list
KEN POR GRE FIN CAN S.R CdI TdC RAC
Raffaele Pinto
Fabio Penariol
distri butor
Statistics
Others starts/finishes 1/0 1/0

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308 GTB Turbo Group 5 at Daytona '81
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308 GTB Turbo Group 5 at Silverstone '81

Drawings

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Engine

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Suspension

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Front suspension
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Rear suspension
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