McLaren M1A group 7 (1965)

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Also called McLaren Elva Mk I
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Download here Chassis 20/09 history
Chassis numbers

Specifications

24 units built
Click here and here and here for Oldsmobile

Oldsmobile/Traco 3.9 lt, V8 (90^o), 4 stroke, petrol engine
4450cc,
aluminium block and head
side camshaft with overhead valves (OHV), 2 valves / cylinder - 16 valves total
310 bhp / 231 KW
aspiration: natural with 4 Weber 48 IDA Carburetors

Chevrolet Small Block gen. I 350

Analytical specifications and drawings

V8 (90^o) cylinder
capacity: 5735 cc, 102.6 x 88.4 mm
OHV with 2 valves per cylinder
Natural aspiration with 4 x Weber 48 IDA Carburetors
Power output, 550 HP (405 KW) @ 7500 RPM
Torque, 730 Nm / 538 lbs ft

Chevrolet Small Block gen. I 350, V8 (90^o) cyl, 4 stroke, petrol engine, located middle longitudinally. Click here and here and here
5735cc, 101.6 x 88.4 mm
550 bhp / 410 KW
730 Nm / 538 lbs ft
cast-iron block 229.2mm height, aluminum alloy head
connecting rod length between centers 144.8mm
side camshaft with overhead valves (OHV), 2 valves / cylinder - 16 valves total
aspiration: natural with 4 Weber 48 IDA Carburetors
firing order: 1-8-4-3-6-5-7-2
wet sump

Chevrolet Big Block Mk IV 366, V8 (90^o) cyl, 4 stroke, petrol engine
5994cc, 99.95 x 95.5 mm
500 bhp / 373 KW
cast-iron block 229.2mm height, aluminum alloy head
connecting rod length between centers 144.8mm
side camshaft with overhead valves (OHV), 2 valves / cylinder - 16 valves total
aspiration: natural with 4 Weber 48 IDA Carburetors
firing order: 1-8-4-3-6-5-7-2

Hewland HD or Hewland LG400 (later) 4-speed gearbox
aluminium alloy-sheet stress panels bonded and riveted in place to stiffen the undertray and lateral-bulkhead areas, on multi-tubular spaceframe chassis made of Large diameter round and square mild-steel tubes
Front suspension single top links with radius arms, lower wishbones, coil springs over dampers, anti-roll bar
Rear suspension reversed lower wishbones, top links, twin trailing arms, coil springs over shock absorbers, anti-roll bar
dual circuit Girling 11.5-inch diameter disc brakes were used at the front, 10.75-inch at the rear
rack and pinion steering
Length 4166 mm (164")
Width 1625 mm (64")
Height 762 mm (30")
Wheelbase 2311 mm (91")
Track (fr/r) 1295 mm (51") / 1295 mm (51")
Wheels (fr/r) 8 x 15" / 10 x 15"
830kg

Results in WSCC

Season races for Prototypes


Car entry, chassis number	Car number/ result
	Dayt	Sebring	Monza	Tourist trophy	Targa Florio	Spa	Nurb	Mugelo	Rossfeld	Le Man	Reims	Freiburg	Ollon	Bridgeh
Team	2000km	12h	1000km			500km	1000km		Hill climb	24h	12h	Hill climb	Hill climb	500km
Bruce McLaren Motor Racing (Oldsmobile)				#9, oil leak
J. O. Counley, (Oldsmobile)				#11, 15th
Wintersteen Racing Inc, M1A 20-10 (Chevrolet 366)														#12, dnf

Statistics
Works Starts/finishes 3/1				2/1										1/0
Drivers	Team entries and car number
Bruce McLaren Motor Racing
Bruce McLaren				9
Wintersteen Racing Inc
George Wintersteen														12