This is original, contemporary technical data, including key differences:
ENGINE
Capacity
|
1558 cc (95.1cu in)
|
Type
|
Twin overhead camshaft
|
No of cylinders
|
4
|
Bore
|
82.55mm
|
Stroke
|
72.7mm
|
Compression ratio
|
10.3:1 (9.5:1 Federal)
|
Firing order
|
1-3-4-2 (No 1 at timing end)
|
Oil pressure (hot)
|
35/40lbs.sq. in
|
Distributor contact breaker gap
|
.014/.016in (.35/.40mm)
|
Performance
|
|
Max BHP (net) @ rpm
|
126 @ 6500
|
Emission
|
113 @ 6500
|
Max torque @ rpm
|
113 lbs ft (15.622kg m) @ 5500
|
Cylinder head identification
|
N or H (S Federal)
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Cylinder head depth
|
4.598/4.603 in (11.68/11.69 cm)
|
Max permissible metal removal
|
.010 in (.254mm)
|
Valve timing
|
|
Inlet opens
|
26º BTDC
|
Inlet closes
|
66º ABDC
|
Exhaust opens
|
66º BBDC
|
Exhaust closes
|
26º ATDC
|
Valve head diameter, inlet
|
1.560/1.566 in (39.624/39.776 mm)
|
Weber Carburettor 40 DCOE 31
|
|
Choke
|
33mm
|
Main jet
|
120
|
Air corrector jet
|
155
|
Accelerator pump jet
|
35
|
Dellorto Carburettor DHLA 40
|
|
Choke
|
33mm
|
Main jet
|
120 (135 European emission)
|
Main air corrector
|
130 (200 European emission)
|
Accelerator pump jet
|
35
|
Idling jet
|
50.02 (47L European emission)
|
Starter jet
|
70
|
Needle valve
|
150.33
|
Air trumpet length
|
42mm
|
Front – part number
|
Q026 S 0710W
|
Rear – part number
|
Q026 S 0711W
|
Ignition timing (static)
|
|
Weber & Dellorto carburettors
|
12º BTDC
|
Zenith-Stromberg (Federal)
|
12º BTDC
|
Zenith-Stromberg (other territories)
|
9º BTDC
|
Sparking plugs - Type
|
|
Weber & Dellorto carburettors
|
Champion N7Y
|
Zenith-Stromberg (Federal)
|
Autolite AG.32
|
Zenith-Stromberg (Federal above 85 mph)
|
Champion N7Y
|
Zenith-Stromberg (other territories)
|
Champion N7Y
|
Sparking plugs - Gap
|
|
Non-exhaust emission
|
.020/.023in (.508/.584mm)
|
Exhaust emission
|
.025in (.635mm)
|
Valve clearances
|
|
Inlet
|
.005/.007in (.127/.177mm)
|
Exhaust
|
.009/.011in (.228/.279)
|
|
|
GEARBOX (TRANSMISSION)
|
|
Gearbox ratios (synchromesh on all forward gears)
|
|
Top
|
1.000
|
Third
|
1.397
|
Second
|
2.010
|
First
|
2.972
|
Reverse
|
3.324
|
Rear axle ratio
|
3.55 or 3.77
|
Road speed per 1000 rpm in top
|
|
3.77 final drive
|
17.62 mph (28.35 kph)
|
3.55 final drive
|
18.50 mph (29.77 kph)
|
|
|
FRONT SUSPENSION
|
|
Front wheel toe-in
|
3/16th in (4.8mm) to 1/16th in (1.6mm)
|
Camber angle
|
0º to + 1º
|
Castor angle
|
3º to +/- 30º
|
Swivel pin inclination
|
9º to +/- 30º
|
|
|
REAR SUSPENSION
|
|
Rear wheel toe-in
|
3/16th in (4.8mm) to zero
|
Camber angle
|
1º to 0º
|
|
|
WHEELS AND TYRES
|
|
Wheels - Type
|
Pressed steel Lotus knock -on
|
Size
|
4 ½ J
|
Tyres
|
|
|
Firestone F100 or Cavallino Sport 200
|
|
Goodyear G800
|
|
Dunlop SP Sport
|
Size
|
155x13 (80 Profile)
|
Pressure (cold) – at speeds below 100mph
|
|
Front
|
18lbs sq in (1.27 kg cm)
|
Rear
|
23lbs sq in (1.62 kg cm)
|
Pressure (cold) – sustained speed over 100mph
|
|
Front
|
24lbs sq in (1.69 kg cm)
|
Rear
|
29lbs sq in (2.04 kg cm)
|
|
|
DIMENSIONS
|
|
Wheelbase
|
84in (213.4cm)
|
Track (at wheel hub)
|
|
Front
|
47 3/32in (119.6cm)
|
Rear
|
47 1/16in (119.5cm)
|
Overall
|
|
Length
|
145in (368.3cm)
|
Width
|
56in (142.2cm)
|
Height
|
|
Coupe
|
46 1/2in (118.0cm)
|
Convertible
|
45 1/2in (115.6cm)
|
Design ground clearance
|
6in (15.2cm)
|
Turning circle
|
33ft 6in (10.2m)
|
Average kerb weight (unladen)
|
|
Coupe
|
1550lbs (703kg)
|
Convertible
|
1540lbs (698.5kg)
|
|
|
CAPACITIES
|
|
Fuel tank
|
9 ¼ gallons (11 US galls, 42 litres)
|
Engine (with filter) oil
|
7 ½ pints (9 US pints, 4 litres)
|
Gearbox oil
|
1 ¾ pints (2.1 US pints, .99 litres)
|
Rear axle oil
|
2 pints (2.4 US pints, 1.2 litres)
|
Cooling system (with heater)
|
14 pints (16.8 US pints, 7.9 litres)
|
Battery (negative earth)
|
12 volt 39 amp hr
|
|
|
SERVICING
|
|
First after sales service
|
500 miles (800 km)
|
A service
|
3000 miles (5000 km)
|
B service
|
6000 miles (10,000 km)
|
A service
|
9000 miles (15000 km)
|
C service
|
12000 miles (20,000 km)
|
And so on
|
|
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