[Healeys] RB106/2 control box question

[Bob Haskell]

Listers,

The 100-6/3000 factory workshop manual I have doesn't give the voltage 
limits for the voltage regulator in the RB106/2 control box.  It does 
give the limits for the later RB340.  The 100 workshop manual does have 
the settings for the RB106/2.

Ambient Temperature	RB106/2		RB340
10 degC (50 degF)	16.1 to 16.7vdc	14.9 to 15.5 vdc
20 degC (68 degF)	15.8 to 16.4	14.7 to 15.3
30 degC (86 degF)	15.6 to 16.2	14.5 to 15.1
40 degC (104 degF)	15.3 to 15.9	143.3 to 14.9

The Lucas Workshop instructions for the RB106/2 state that the range is 
16.0 to 16.5 volts.

Why the large difference between the two control boxes?  Is the 16.0 to 
16.5 vdc still appropriate today?  Currently using a flooded cell 
battery.  Have used an Optima AGM in the past.

Cheers,

Bob Haskell
Austin Healey 3000 BN7/BT7 registrar