RE: [alfa] Voltage regulator info

["Jeff Greenfield" <alfaguy@xxxxxxxxxxxx>]

Jon -

The Bosch part number for the external regulator is: 30-051, this also fits
many older Volvos, VW's, BMW's, etc.

Not aware of any adjustable external regulators.

The part number for the later alternator, with internal regulator (which is
pretty much all that Bosch supplies these days, IOW if you order a Bosch
rebuilt Alternator for a '77 Spider, you will get one with an internal
regulator. This only applies to units that are rebuilt and/or supplies
directly from Bosch.) is AL-16x. Unfortunately I don't have the long number
handy. 

AL-16x fits spiders, Milanos, and GTV-6's. I am not aware of any other cars
that use this exact alternator, but that does not mean that there is
something else out there that uses it.

Some of the various suppliers do offer an adjustable regulator for this
alternator.

HTH,

Jeff

-----Original Message-----
From: owner-alfa@domain.elided [mailto:owner-alfa@domain.elided] On Behalf Of Jon
Pike
Sent: Wednesday, January 28, 2004 4:13 PM
To: alfa-digest@domain.elided
Subject: [alfa] Voltage regulator info

Hi all..

A question and some info..

I was checking my alternator at a auto parts store (they have a machine 
to run them) and noticed it read a bit low on the voltage.  Turns out 
their machine reads low,  and I actually was pretty high.  In the car I 
measured 14.2 or so at idle, and up a half a volt or more when running 
faster.

So, I would like to know if anyone has found a good, cheap adjustable 
solid state VR that will work with the Bosch external reg alternators?  
I'd prefer an adjustable,  since there is some drop to deal with on a 
Spider with the battery in the trunk. (long wires)

The other thing, did some looking at things in the parts store,  and the 
guy pulled out a (80's?) Volvo regulator (wish I wrote the ##'s down) 
that had the same 3 prong plug and worked well with my Bosch.  It seemed 
a little low compared to mine, but with their out of cal meter, it 
probably was just right.  So it's probably a similar if not the same alt 
as Alfa was using.   Solid state, but non adjustable.

Jon Pike
77 Spider
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