1971 Lotus Elan +2S Technical information


Different sources state different technical info on this car. For this info I have used the following sources;
Lotus Elan Type 26 - 36 - 45 - 50  - Unique Motor Books   (ref # 1)
Lotus Elan and Europa - A Collctor's guide -  John Bolster   (ref # 2)
Lotus Elan Workshop Guide - Brookland Books   (ref # 3)
Lotus Elan - A restoration Guide  -  Gordon Lund    (ref # 4)


Dimensions:
Wheelbase
Ground clearance
Overall length
Overall width
Overall height
Track - rear
Track - front
Weight


2438 mm
165 mm
4286 mm
1682 mm
1193 mm
1397 mm
1371,6 mm
948 kg. (1),  889 kg (2),  
Capacity:
Engine oil, incl filter
Gearbox
Final drive
Fuel
Colant


4,25 litres
1,00 litres
1,2 litres
59 litres
8 litres
Engine:
Type
Capacity
Bore and stroke
Compression ratio


4 cylinder, 4-stroke water cooled
1558 ccm (95,08 cu)
82,550 x 72,746 mm
10,3 : 1

Performance:
Power
Maximum speed
Fuel consum
0-96 km/h (60mph)


126 BHP  /  92 kW @ 6500 rmp
195 km/h   /   121 mph
1 litre pr 10 km /  23 mpg
7.4 s
Valve timing:
Inlet opens BTDC
Inlet closes ABDC
Exhaust opens BTDC
Exhaust closes ABDC


26 degrees
66 degrees
66 degrees
26 degrees
Valve clearance (cold):
Inlet
Exhaust (to engine # 9951)
Exhaust (from engine # 9952)


0,127 to 0,177 mm
0,152 to 0203 mm
0,228 to 0,279 mm
Fuel system:
pump, type
Pump preassure
Air cleaners
Carburettes
Slow running speed (Weber)


Mechanical, actuated from the jackshaft
0,086 to 0,172 bar
Dry paper element
Two Weber, two Zenti-Stromberg or two Dellorto
800 to 900 rpm
Weber carb spec:
Choke
Main jet
Air correction jet
Slow-running jet
Accelerating pump jet
Accelerating pump stroke
Starter air jet
Starter petrol jet
Emulsion tube
Needle valve
Air trumpet length

40 DCOE 31
33 mm
120
155
50 F8
35
10 mm
100
F5/100
F11
1,75
38,0 mm
Ignition system:
Type
Firering order
Distributor make
Distributor type
Distributor points gap
Distributor cam dwell


Coil and distributor
1, 3, 4, 2
Lucas
23D4 or 25D4 (exhaust emission)
0,35 to 0,40 mm
60 degress +/- 3 degrees
Transmission:
Gearbox
Gearchange
Gearbox ratioes ( :1 )
 reverse
 - 1
 - 2
 - 3
 - 4
 - 5
Final drive ratio (otional)
Lubrication Gearbox
Lubrication final drive


4-speed and reverse
Manuel, syncromesh on all forward ratios
Close ratio (Semi close)
2.807  (3.324)
2.510  (2.972)
1.636  (2.009)
1.230  (1.396)
1.000  (1.000)
N/A  (N/A)
3.777:1  (3.555:1)
EP80 gear oil of reputable brand
EP90 gear oil of reputable brand
Suspension:
Type
 Front springs
  Number of coils
  Wire diameter
  Free length
  High free length
  High fitted length
 Rear springs
  Number of coils
  Wire diameter
  Free length
  Fitted length

Hub bearing end float (front)
Toe-in (front)
Toe-in (rear)
Wheel camber - front
Wheel camber -rear


Indepentendt, coils springs (front and rear)

15.6
8,7 mm
360 mm
218 mm
229 mm

9,7
10,9 mm
406 mm
218 mm

0,05 to 0,10 mm
4,76 mm
0 to 4,76 mm
0 to 1 degree positive
0 to 1 negative
Steering:
Type
Turning circle


Rack and pinion
8,5 m
Brakes
Make and type
Hydraulic fluid
Single / dual line
Servo asstistance
Minimum pad thickness
Disc diameter
Disc run out
Handbrake


Girling hydraulic, disc front and rear
Castrol/Girling brake and Clutch universal fluid or DOT3/4
Depending on model
Depending on model
2,5 mm
254 mm front, 254 mm rear
0,10 maximum
Mechanical, rear wheels only
Electrical
Polarity of earth
Fuses
Battery
Generator type
Generator minimum brush length
Generator cuts in at
Generator maximum output
Generator rantor field resistance
Generator control box
Alternator type
Alternator polarity
Alternator minimum brush length
Alternator rectifier
Alternator max output (hot)
Alternator regulator voltage
Alternator rotor winding resistance
Alternator stator winding resistance
Starter motor
Starter motor switching
Starter motor minimum brush length


Depending on model, check manual
12
12volt, Exide 6VTA 29L, 39 amp/hr
Lucas C40
6.0 mm
1450 rpm and 13 volts
22 amps at 2250 rpm
6.0 ohms
RB 106/2 or RB340
Lucas 17 ACR (12 pole, 3 phase)
Negative only
5.1 mm
Integral diode
36 amps at 6000 rpm
14,1 to 14,4
4.165 +/- 5% ohms at 20 Celsius degrees
0.133 ohms per phase
Lucas M35G or 35J
Solenoid
8.0 mm









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