You might want to take a look at this web page that shows how to convert
a BOSCH alternator to an external regulator using a FORD regulator. THe
author alleges that the internal regulator in the BOSH alternators are
known for getting 'lazy'  and lowering the voltage output.

http://www.geocities.com/MotorCity/4242/alternator_ext-reg.html

Todd
'88 Westy

David Marshall wrote:

> They are internal - although I have been experimenting with external
> mounted next to the battery for less voltage loss.
>
>
> David Marshall
>
> Fast Forward Autobahn Sport Tuning
> 4356 Quesnel Hixon Road
> Quesnel BC Canada  V2J 6Z3
> mailto:info@fastforward.ca      http://www.fastforward.ca
> Phone: (250) 992 7775           FAX: (250) 992 1160
>
> � Vanagon Accessories and Engine Conversions
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>
>      -----Original Message-----
>      From: Vanagon Mailing List
>      [mailto:vanagon@gerry.vanagon.com]On Behalf Of patty and
>      danny
>      Sent: March 16, 2001 5:49 PM
>      To: vanagon@GERRY.VANAGON.COM
>      Subject: voltage regulator
>
>      A stupid question from a true beginner, on an '81 aircooled
>      vanagon is the voltage regulator alternator mounted or
>      external mounted? Thanks,Danny'81 Westy
>

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