Fiat 127 - Electrical System

Fiat 127 Internet Fan Club (http://fiat127.okruhy.cz) Fiat 127 - 1050
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Maximum run-out of driven plate linings 0.2 mm (0.008 in)
Travel of release flange, corresponding
to a pressure plate displacement of not less
than 0.067 in ~1.7 mm) 8.5 mm (0.3346 in)
Transmission
Synchromesh 1st and 2nd, Borg-Warner baulk ring type,
3rd and 4th, Porsche spring ring type
Gear ratios
First 3.910 : 1
Second 2.055 : 1
Third 1.348 : 1
Fourth 0.963 : 1
Reverse 3.615 : 1
Final drive ratio (C,L and CL) 4.071 : 1 (14/57)
Final drive ratio (Sport) 4.462 : 1 (13/58)
Overall ratios
Gears 1
st
2
nd
3
rd
4
th
Reverse
C, L and CL 15.92 8.7 5.49 3.92 14.72
Sport 17.45 9.17 6.01 4.30 16.13
Electrical system
Alternator
Type (C, L and CL) Magneti Marelli AA 108-14V-33A
Type (Sport) Lucas 18ACR-A4V-45A
Maximum output (approx) 570 watts
Maximum current (approx) 40 amps (C, L and CL)
50 amps (Sport)
Cut-in speed at 12V and 20°C (68°F) 1050 to 1150 rpm (C, L and CL)
1100 to 1200 rpm (Sport)
Field winding resistance across slip rings at 20°C (68°F) 3.4 to 3.8 ohms (C, L and CL)
3.18 to 3.22 ohms (Sport)
Direction of rotation (drive end) Clockwise
Engine/alternator drive ratio 1.8 : 1
Alternator regulator (C, L and CL models)
Type Magneti Marelli RTT 110 AB
Alternator speed for adjustment 6000 rpm
Current for thermal balance 20 amps
Regulating voltage 14.2
+0.3
–0.2
volts