[DeTomaso] GM Alternator

[doug351c]

Could this mysterious "L" terminal possibly be a "Lamp" terminal?

Doug Braun
blue 73 #5505

-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of Rob Dumoulin
Sent: Monday, August 01, 2011 5:05 AM
To: Will DeMelo
Cc: detomaso at realbig.com
Subject: Re: [DeTomaso] GM Alternator


Not sure if the L terminal is the Field wire or not.  My alternator guy told
me what to do and it worked like a champ.  I wanted to go with the 100 Amp
but did the 130 instead. It has done me well, but it scares me when I would
run the battery down and start the car up. The ammeter pegs for a while and
I suspect pushes more current than the original wires were designed to push.
 I keep a trickle charger on the battery to not have that situation.

On Sun, Jul 31, 2011 at 9:23 AM, Will DeMelo <wdemelo at cogeco.ca> wrote:

> Thanks Rob.
>
> Is the internal "L" term the "field" terminal?
>
> Also, what is the recommended size alternator to accommodate todays high
> current draws? 100a? Or is the "CS 130" a 130 amp alternator, which would
> bviously be plenty.
>
> Will
>
>
>
>
>
> From: Rob Dumoulin [mailto:rob at dumoulins.net]
> Sent: Sunday, July 31, 2011 8:08 AM
> To: Will DeMelo
> Cc: detomaso at realbig.com
> Subject: Re: [DeTomaso] GM Alternator
>
>
>
> Here are my notes from when I wrote it up.
>
>
>
> To convert your 3-wire to a 1-wire alternator and have the new alternator
> configured to control charging light in the dash, get a Delco CS-130
> alternator modified by a local alternator shop as follows:
>
> *       Have the shop measure the offset of your old alternator and
install
> the correct single-groove pulley.
> *       Modify the internal voltage regulator of the alternator to be a
> D411
> model and hook the internal regulator terminal L to have an external port.
> *        Inspect your existing voltage regulator and notice the terminal
> labeled i.
> *       Unplug the voltage regulator connector and splice the "I" terminal
> wire to the new alternator port just created.
> *       Double-wrap all connectors on the old harness securely with
> electrical tape except for the large black wire which will be your charge
> wire to your ammeter.
>
> Hope this helps
>
>
>
> Rob
>
>
>
> On Sun, Jul 31, 2011 at 7:24 AM, Will DeMelo <wdemelo at cogeco.ca> wrote:
>
> Is anyone using a GM alternator with an internal regulator? If so, do you
> have 1 wire going from the existing 4 pin regulator plug to the "field"
tab
> on the alternator? Is your "gen" light working properly?
>
> Any details appreciated.
>
> Will
>
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> --
> Rob DuMoulin
> 904.476.8744
> rob at dumoulins.net
>
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--
Rob DuMoulin
904.476.8744
rob at dumoulins.net
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