15
Batteries are rated by various methods. Perhaps one of the more robust methods is Cold
cranking amps (CCA). According to Exide CCA is ‘
the discharge load in amperes which a new fully
charged battery at -18
/
C can deliver for 30 seconds and maintain a minimum voltage of 1.2 volts per
cell. Therefore, the higher the CCA rating the more powerful it is in producing higher starting voltages
to meet the demands placed on it
’ [29]. Another method is Reserve capacity in minutes RC(m), which
is ‘
the time in minutes that a new fully charged battery will supply a constant load of 25 amps at 25
/
C
without the voltage falling below 10.5 volts for a 12 volt battery and 5.25 volts for a 6 volt battery.
Therefore, the higher the reserve capacity, the more powered time you have to run auxiliary items
such as lights, radio, air conditioning, electric windows etc in the event of a charging system failure
’
[29].
16
Use identical batteries:
‘If you connect two 12-volt batteries in parallel, and they are identical
in type, age and capacity, you can potentially double you original capacity. If you connect two that are
not the same type, you will either overcharge the smaller of the two, or you will undercharge the larger
of the two
’ [28].
17
Two lighter duty batteries might be a suitable compromise for mild climates, e.g. 2x Exide
N50 or 2x Exide NS70 were recommended to me by Exide NZ. If a single battery is used, then it
should probably be the heaviest duty type. If the engine is in good order, the battery is new, and the
weather warm, then almost any 12V battery will start the engine. If any of those factors change, then
additional battery current capability may be necessary.
33
Electrical
Alternator belt tension
Alternator and water pump/fan
belt
6-8 mm new, 5-6 mm used, under 10 kg load
[1]
or 9-11 mm [2]
or 8.0-11.0 mm new or old [4]
<which span is this measured at?
Uppermost?>
Gates 7385 (11A0980) Two off
Battery
Starting current
Cold cranking amps (CCA)
15
capacity recommended by
Mitsubishi
Candidate battery
Number of batteries required
negative earth
2 x 12V in parallel
16
64 Ahr
173-211 A
unknown
‘Exide’ N70ZZ or N70EX
[30]
(see below)
One or two. Probably two if used in cold
climate
17
.
Glow plugs
resistance 0.5 ohms ?
Fuses
For layout of fuse box see
http://www.delicaclub.com/load.php?id=39