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Join Date: Jul 2001
Location: Phoenix, AZ USA
Posts: 503
Garage
Adjustable voltage regulator

Does anyone remeber this or know if this company is still in business..post was from 2001 but I think it would have stood out to get the full 14 volts out of our alternators...Haven't yet sent an email to see if they are in business...wondering if anyone knows ???

From: Michael (Prospeed Motorsports) [michael@prospeedmktggrp.com]
Sent: Thursday, June 28, 2001 1:16 PM
To: 928
Subject: [928] Adjustable Voltage Regulator

Have you noticed, like I did, that the factory Bosch alternators doesn't
seem to put out much voltage? I was curious about this and had a chat with
my local rebuilder. What I learned was the Bosch voltage regulator caps the
maximum alternator voltage at about 13.5 - 13.8 volts and tends to drop as
the alternator gets hot.

The solution I found is an Adjustable Voltage Regulator. This regulator will
allow a maximum voltage output of 14.4 volts. For comparison, this is the
voltage that you will find on most if not all domestic vehicles. With the
Adjustable Voltage Regulator installed on my 1993 968, the results were
brighter lights, no drop in interior fan speed when the second cooling fan
kicked in, tighter bass from the aftermarket stereo, etc. Basically solved
all the issues associated with alternator low voltage were completely
eliminated. I now find the dash volt meter will stay right on the 14 volt
mark with the stereo, lights, A/C and wipers on (Basically everything
possible turned on). A tremendous difference.

The Adjustable Voltage Regulator replaces Porsche part #928 603 142 00 and
will fit:

911(C2/4 & 993) 89 - 98
928 87 - 95
924/944/968 83 - 95

It is a direct bolt-in replacement. A couple of screws and a wire to remove
and plug-in replacement. Easy!

The Adjustable Voltage Regulator retails for $45.95 plus $5 shipping. You
can get additional information and how to order by going to
prospeedmktggrp.com. For the regulator (and info on high output
alternators) click on the "Electrical" button. For ordering information,
click on the "How to Order" button or call, toll free, 866.968.944

Michael G. Wachholz
Prospeed Motorsports
400 Pond Ridge Circle
Wayzata, Minnesota 55391
866.968.2944 toll free
952.475.267 fax


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Beer Cigars and a 10mm socket...
Old 01-17-2012, 06:42 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Porsche Nut
 
Join Date: Feb 2010
Location: San Diego, CA
Posts: 445
Garage
The web site is now a place holder. But I would also be interested if this type of regulator exists (at a reasonable price).
Old 01-17-2012, 07:57 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
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