On 7/13/2005 10:16 AM mark drillock wrote:

> There are adjustable voltage regs available for our Bosch alternators
> for not much money if you want to set it to the high end of "normal".
> You can choose from internal type with an adjustment pot on the brush
> assembly or an external type with long wires from the brush assembly to
> the remote reg and it's adjustment pot for easier fiddling. You might
> consider the external type with an added switch to allow a dropping
> diode to to be added or removed from the sense wire circuit. This would
> let you easily boost the charging voltage when really needed and return
> to normal charging voltage the rest of the time, all with the flick of a
> switch.
>
> http://bartonharness.com/AdjustableVoltage.html
>
Thanks, Mark.

Getting the output of the alternator up from 13.8V to something like
14.7V would help bring my Optima battery up to full charge before
pulling into camp. (See "Car Batteries are not 12 Volts" at
http://www.landiss.com/battery.htm , and http://tinyurl.com/4qem7 ).

I like the idea. But I could use some advice about which of their models
appears to be the right one for me:

Does the '84 Vanagon's alternator have a 28mm or a 32mm diameter slip ring?

Or maybe an ETKA will tell the correct voltage regulator part number for
the 84?

Barton Harness provides this list of candidate Bosch part numbers:

In the 28mm dia slip ring category: 034 903 803, 068 903 803,  068 903 803D,

In the 32mm dia slip ring category: 028-903-803A, 049-903-803B,
049-903-803E, 049-903-803F, 052-903-803, 059-903-803, 059-903-803B,
059-903-803C, 063-903-803, 070-903-803A

--

Mike "Rocket J Squirrel" Elliott
71 Type 2: the Wonderbus
84 Westfalia: Mellow Yellow ("The Electrical Banana")
Carlsbad, CA
KG6RCR