Cunningham C4R group S (1952)

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3 units built
Click here and here and here
Click here for Chrysler C52 engine
Chrysler Hemi 331 Firepower, V8 (90o) cyl, 4 stroke, petrol engine
5424cc, 96.8 x 92.1 mm
300 HP / 5200 rpm
block deck height 263.4mm, cast bell housing in the back of the block, bore spacing 115.9mm
forged steel cross plane crankshaft with 5 main bearings 63.5mm diameter, connecting rod length between centers 168.3mm with 57.15mm big end bearing diameter
1 side camshaft (OHV), 2 valves / cyl - 16 valves total. 46mm inlet valve diameter, 38.1mm exhaust valve diameter. 9.5mm stem diameter, 127.8mm valves length. Dual valve springs
aspiration: natural with 4 dual-throat downdraft Zenith carburetors
6V battery 130 Amp/Hrs capacity, Autolite Coil for ignition. Firing Order: 1-8-4-3-6-5-7-2, (front to rear: Right bank 2-4-6-8, left bank 1-3-5-7)
water cooled
4 speed manual gearbox
final drive 3.36/1, hypoid helical gears rear differential
dry single plate clutch
steel tubular frame chassis, aluminium bodyshell
Front suspension, unequal length A-arms, coil springs, tubular shock absorbers
Rear suspension, live axle, coil springs, tubular shock absorbers
Worm and Roller steering
330mm diameter drum brakes all-round
Length 3937 mm (155")
Width 1626 mm (64")
Height 991 mm (39")
Wheelbase 2540 mm (100")
Track (fr/r) 1372 mm (54") / 1372 mm (54")
Cast magnesium rims 16"
Tire Size 7.00x16″

Results in famous races (until 1952) and in WSCC (1953+)

Car entry, chassis number Car number/ result
Sebring Mille Miglia Le Mans Targa Florio Pescara Carrera Pan
Team 12h 1600km 24h 12h
Briggs S. Cunningham, R5216 #21, with drawn #1, 4th
Briggs S. Cunningham, R5217 #3, eng ine
Briggs S. Cunningham, R5218 (RK) #2, eng ine
Total points
Works Starts/finishes 4/1 1/0 3/1
Drivers Team entries and car number
Briggs S. Cunningham
Phil Walters 21 2
John Fitch 21 3
Briggs Cunningham 1
William Spear 1
Duane Carter 2
George Rice 3

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At Le Mans '52
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Oil system
Exhaust manifold flange
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