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Maserati Tipo 6CM
Specifications
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Maserati Tipo 6CM

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SPECIFICATIONS

Brief History:
With pressure from the ERA, the 4CM 1500 whilst still competitive prompted Ernesto to take the step of building the 6CM 1500 which incorporated all the innovations present in both the V8RI and the 4CM.  The new car which appeared in 1936 had the conventional frame from the 4CM and rigid rear axle, but the independent front suspension from the V8RI and the in-line 6 cylinder motor used the design of the cylinders cast in block with the head and mounted in pairs on the crankcase.  After proving more than a match for the ERA, the 6CM was radically modified in 1938 with a more powerful engine, new semi-cantilever rear leaf springs, the lowering of the frame and the placement of fairings over the suspension on the side of the car to improve aerodynamics.  Then in 1939, a third version with changes to a taller radiator or grille cowling.  At this time, which was during the construction of the 4CL and in the declining period of the 6CM, a four valve per cylinder motor (24 valve) was used in the last two cars made, but with little success in its initial outings.  By 1940 experiments had begun with a naturally aspirated version of the 6CM which would lead eventually in 1946 to the 6CS/46 and the A6.

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Specifications:
Production Period: 1936-1939
Designed By: Maserati
Body Built By: Maserati - single seater in aluminium - there were three versions; the first in 1936 with no side fairings;  a redesign in 1938 with side fairings and a third version in 1939 with taller radiator cowling
Number Built: 27 - the car was completely remade in 1938
Dry Weight: 650 kg
Top Speed: 210-230 kph
Engine Type: Front, vertical in-line six cylinder
Bore and Stroke: 65x75 mm
Displacement: 1493.2 cc
Compression: 6:1
Engine Output: 155-175 bhp @ 6200-6600 rpm
Valves & Actuation: Two OHV per cylinder in 90º "V" with dual overhead camshafts, then 2 twenty-four valve or four OHV cars from 1939
Carburettion: Forced by Roots compressor with Weber 55ASI (55-50CCO) on compressor intake. Mean effective pressure 15.07-15.98 kg/sq. cm
Ignition: Single with Scintilla magneto
Lubrication: Forced with pressure and scavenger pumps
Drive: Rear wheel drive
Clutch: Dry single disc
Gearbox: 4-speeds plus reverse
Frame: Two longitudinal members with cross-members of profiled steel
Suspension - Front: Independent wheels, torsion bars with friction dampers
Suspension - Rear: Rigid axle, longitudinal leaf springs with friction dampers
Brakes: Hydraulically operated wheel drums
Wheelbase: 2490 mm
Front & Rear Track: 1200 mm front; 1200 mm rear
Wheels & Tyres: Spoked: 4.00x16 - 4.00x17
Tyres: Pirelli 6.00x16 - 5.25x17 front and rear
    
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Last updated:   Monday, June 30, 2003.