Why guess or rely on anecdotes? The Bentley gives a spec for this. Same
spec as any other Bosch alternator of the same type and vintage, afaik.

Run engine at 3000 rpm with no electrical load until measured voltage is
stable.
Voltage at the alternator should be between 13.5 and 14.5 volts

Mark

George Goff wrote:

>Good rule of thumb.
>
>Loaded down, the regulated voltage should between 13.8 and 14.8 V.  Less, and
>the battery is going to eventually go flat, more, and the battery boils.....
>
>