Home » Public Forums » GMCnet » Isolater vs Alternator (My experience)
| Re: [GMCnet] Isolater vs Alternator [message #326646 is a reply to message #326632] |
Sat, 02 December 2017 11:59   |
Richard Denney
Messages: 920
Registered: April 2010
Karma:
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Senior Member |
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Most passenger cars used one-wire alternators, where the output voltage is
sensed internally. We used to convert Delco three-wire alternators to
one-wire alternators by wiring the field-sense wire to the exciter wire
(which is connected to the battery). I built a rally car out of a Toyota
Corolla back in the day, and the three sets of driving lights were too much
for the 40-amp Toyota alternator. I replaced it with a Delcotron modified
to tie the sense wire to the exciter wire right at the plug.
With a combiner, I don't see why we couldn't do that now--no isolator diode
drop requiring compensation. That would reduce the failure point to the
plug itself.
Rick "thinking out loud" Denney
On Sat, Dec 2, 2017 at 8:11 AM Ken Henderson wrote:
> Tom,
>
> WIth the installation of a combiner, the chassis battery is always
> connected to the voltage sense line to the alternator, thus eliminating one
> of the two most common causes of sense circuit failure. The second, much
> less common, failure, the connection at the alternator, can only be managed
> by rare preventative maintenance: Disconnect and examine the connector,
> replacing it if corroded or weak, and applying some contact
> cleaner/lubricant, such as CRC 2-26. Gene Fisher's APC (Alternator
> Protection Cable) offers new, good quality, connectors so its installation
> should help, despite the addition of one more pair (Pins 1 & 2) of
> connections. The Nichrome wire protection is not the only benefit of the
> APC! :-)
>
> Ken H.
>
> PS: Tom, I just noticed your signature block: "Elkton, FL". When did
> you move? Or are you playing Snowbird? Will we get to see you at the
> January GMCSS/GMCDL rally in St. Augustine? KH
>
>
> On Sat, Dec 2, 2017 at 7:54 AM, Tom Lins wrote:
>
>>
>> The question that comes to my mind is there a way to protect against the
>> sense circuit failure?
>> Or is vigilance your best defense?
>> --
>>
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--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
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