Cadillac Model B 1905

Cadillac Model & history B 1905

TheModel B was introduced in 1904. The single cylinder Model B remained unchanged from the 1904 Cadillac. The horsepower was now rated at 9 instead of 8.5. In 1904, the optional 1524mm (wide track was not available on the Model B; but this year a 1549mm tread was also made optional by the use of tubular axle to replace the pressed steel axle with standard tread.

MODEL B IDENTIFICATION & SPECIFICATIONS

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1905 Cadillac rear entrance tonneau

Model No.	Body type	Seating	Price	Weight
Model B	Touring	4	$900	659 kg
Model B	Surrey	4	$900	659 kg

Engine

Engine typeHorizontal with cylinder to rear

Number of cylindersone

Block constructionCast iron cylinder

Water jacketCopper

Bore & Stroke127mm x 127 mm (5.00 inch x 5.00 inch)

Displacement1.609 litres (98.2 cu. in.)

Brake H.P.“Higher than advertised or calculated H.P.”

Advertised H.P.9 H.P.

ALAM. NACC, SAE H.P.Calculated by identical formulae; ALAM first used formula in 1908

Main bearingsTwo

Valve liftersMechanical

Engine numbers4200-5000 with EF (1904)

CarburetorUpdraft mixer, manufactured by Cadillac

Chassis

Wheelbase1930mm (76 in.)

Overall length2845 mm (112 in.)

Height1524mm (60 in.)

Front/Rear Tread1435mm (56.5 in.)

Optional Front/Rear Tread1549mm (61 in.)

Wheels12 spoke wood wheels (24 inch)

Tire30″ x 3″ clincher

Brake typeMechanical

Brake wheel locationTwo rear wheels

Brake contractionOn inboard drums

Weight659 kg (1450 lb)

Drivetrain

TransmissionPlanetary transmission

Speeds2 forward, 1 reverse

Ratiolow=3:1; high=1:1; rev.=3:1

Controlslow=foot pedal; rev and high=lever to right

Clutchlow and reverse=bands; high=discs

DriveChain drive

DifferentialSpur gear

Overall ratio3.1:1 to 5:1

Drivetrain OptionsTen different ratios

Note:

The transmission had two forward speeds (3:1 and 1:1) and one reverse with a disc clutch and chain drive.
The overall ratio was between 3.1:1 and 5:1 depending on the combination of the size of the sprockets.

The drive sprocket had 9 or 10 teeth and the driven sprocket had 31, 34, 38, 41, or 45 teeth.

	9-T Drive sprocket	10-T Drive sprocket
31-T Driven sprocket	3.44:1	3.10:1
34-T Driven sprocket	3.78:1	3.40:1
38-T Driven sprocket	4.22:1	3.80:1
41-T Driven sprocket	4.56:1	4.10:1
45-T Driven sprocket	5.00:1	4.50:1

The lower ratios were used on the runabouts used on smooth, level roads; but the higher ratios were used on hilly roads and for delivery vehicles.
Owners were instructed how to change the sprockets, but it involved the disassembly of the transmission and rear axle — hardly a job for the average motorist.