All Waterboxers come originally with a 90 amp alternator (AL27X or AL33X),
which were also used on 85-88 Golfs & Jettas.  The difference is just in the
pulley, so there's really no upgrade going on here  Both my 84s have 90 amp
alternators.

See also these reference links from Gerry's archives:

Posted by Mark Drillock in November 2005:
http://gerry.vanagon.com/cgi-bin/wa.exe?A2=ind0511c&L=vanagon&F=&S=&P=12519

and one I made about the same time:
http://gerry.vanagon.com/cgi-bin/wa.exe?A2=ind0511c&L=vanagon&H=1&P=11966

If yer running an Air Cooled 80-83.5 Vanagon, yer stuck with the 65amp model
unless you can get a local rebuilder to upgrade it to 90amp operation (it's
been done).
--
Jim Thompson
84 GL 1.9 "Gloria"
84 Westfalia 2.1 "Ole Putt"
73 K Ghia Coupe "Denise"
72 411 Station Wagon "Pug"
oldvolkshome@gmail.com
http://www.oldvolkshome.com
**********************************
On 6/21/07, Christopher Gronski <gronski@gmail.com> wrote:
>
> The webpage I was looking for was:
>
> http://volksweb.relitech.com/90alt.htm
>
> The text (for the archives) is:
>
> ============================================================
>
> Alternator Alternatives
>
> Last week, the dashboard warning light (AKA - "idiot light") for the
> alternator lit up. When that light is on, it means that battery
> voltage is higher than the alternator output voltage. In other words,
> the alternator output is low or non-existent. I suspected the voltage
> regulator mounted on the back of the alternator was the culprit, so I
> priced one out from my local FLAPS. For $60 I could get a Bosch unit,
> or $30 bought me a Taiwan no-name regulator. A Bosch brand rebuilt
> alternator (Model AL27X) with a lifetime warranty from the same FLAPS
> was $160.
>
> Being the cost-conscious type that I am, I wondered about a used
> alternator. Nice concept, but finding a donor Vanagon in the junkyard
> is a bit rare around here. But the wreckers have plenty of late model
> Golfs and Jettas, and the 90 Amp alternators from them will fit the
> Vanagon just dandy! This is also a great method of upgrading from the
> 65 Amp alternator found in some earlier water-cooled Vanagons.
>
> From these pictures, you can see that the Vanagon alternator (on the
> left) is identical to the Golf alternator (on the right) with the
> exception of the drive pulley for the alternator belt.
>
> To use the Golf alternator on the Vanagon, simply swap the pulleys
> from one to the other. The nut holding the pulley on was pretty tight,
> so I had to use a hand impact driver tool to remove it. In this
> picture, you can see both alternators with the drive pulleys removed -
> exactly identical.
>
> Here's the Golf alternator with the Vanagon pulley installed. Be sure
> to re-use all the spacer washers exactly as before, and apply
> Loctite(r) the threads of of the shaft before installing the nut. I
> installed the used alternator, and checked the output voltage. 14
> Volts, just as it should be!
>
> ============================================================
>
> Unfortunately I am still without a part number or model year for golf /
> jetta
>
> Chris
>
> On 6/20/07, Christopher Gronski <gronski@gmail.com> wrote:
> > Hi All,
> >
> > I heard the Golf 90A alternator is an almost direct drop in to the
> > vanagon (you just have to use your old wheel). Anyone know what year
> > golf and the golf part number?
> >
> > Also, someone had a website on the golf alternator swap. Anyone have the
> link?
> >
> > Chris