Formula Junior
Engine
front mounted, inclined at 9° to the car’s longitudinal axis (offset of 30 mm to the longitudinal axis since 1961); based on Fiat 1100; cast-iron block, light alloy head
Cylinders
4
Bore and stroke
68×75 mm
Capacity
1089 cc
Max output
78 bhp at 6500 rpm (70 bhp at 6200 rpm in 1958)
Lubrication
full pressure by submerged gear-type oil pump
Cooling
forced water circulation
Valve gear
pushrods
Fuel feed
2 double-choke Weber 38 DCOE carburetors (2 Dell’Orto SS 125 B carburetors in 1958)
Ignition
coil and distributor
Clutch
single dry-plate
Gearbox
4 forward speeds + reverse
Chassis
frame with side and cross tubular members
Front suspension
independent, lower and upper A arms, coil springs with coaxial telescopic shock absorbers, and anti-roll bar (lower A arms with upper transverse leaf spring, hydraulic telescopic shock absorbers in 1958)
Rear suspension
live axle with reaction rods, coil springs with telescopic shock absorbers (coaxial since 1960); independent, lower and upper wishbones, swinging half shafts, coil springs with coaxial telescopic shock absorbers
Brakes
drums (rear inboard drums since 1961; disc brakes since 1961)
Wheelbase
2100 mm
Tracks
front 1220 mm; rear 1230 mm
Tire size
front 5.20-12; rear 5.20 -14
Body
single seater, built of aluminium
Dry weight
400 kg
Production period
1958-1961
