alternator swap

[76Rocco@earthlink.net (Curt)]

We are talking tenth's of a volt here not millionth's, Yes meters vary and I
happen to have 3 (Fluke $? can't recall price paid but definitely not the
$300 model,Craftsman $17.99 and a Cen-Tech $6.99 - by the way it's best to
write down who borrowed your meter or you may find you now own 3 when they
come back!) I tested my cars 90Amp under full load (headlights on highbeams,
fresh air fan on high, radiator fan on) with these results:
Cen-Tech 13.79 Volts, + drop 0.028, - drop 0.128 (must have on 200V scale
not 20V)
Craftsman 13.93 Volts, + drop 0.028, - drop 0.123
Fluke        13.84 Volts, + drop     ?   , - drop 0.120 (Fluke has an
automatic selector and when trying the + drop the meter switches to ohms-
yeah just another reason automatics suck! but it did read the - drop)
With no load but running - drop test from battery terminal to alternator
housing:
Cen-Tech - drop 0.06 to 0.07 (fluctuated)
Craftsman - drop 0.07
Fluke        - drop 0.07
Pretty close in range for performing these tests, meters were very close and
the same in some cases in readings, for the average home user I recommend
the craftsman as it was closest to the Fluke and it's loaded with features
although other scales may not be as accurate?

----- Original Message -----
To: <scirocco-l@scirocco.org>
Sent: Thursday, August 22, 2002 2:11 PM
Subject: Re: alternator swap


> It always depends on the voltmeter used.
>
> Not all voltmeters are created equal. Some are more
> acurate than others.
>
> If you are using a 300$ Fluke voltmeter, then your
> reading will be more accurate than if you are using a
> 29$ canadian tire voltmeter.
>
> Don't worry about milivolts differences on a car.
>
> Cheers.
>
> Marc
> '83 Scirocco
> '88 Scirocco Slegato
>
>  --- John Erickson <ranahan@charter.net> a écrit : >
> That 120 amp Audi alternator I put in my car puts
> > out a
> > very steady 14.002 volts.  I don't think 14.1 is a
> > problem.
> >
> > John
> > Long beach
> >
> >
> > On Thu, 22 Aug 2002 12:41:30 -0400
> >   Allyn <amalventano1@comcast.net> wrote:
> > >arg, just tested the 8v roccos alternator. 14.1
> > volts on
> > >startup. this seems a
> > >bit high to me. i took a check on the rieger: 13.6
> > on
> > >startup. that seems more
> > >realistic. is there some 8v alternator magic i dont
> > know
> > >about? or is that 8v
> > >number really too high? i suppose swapping over
> > regulator
> > >assemblies would fix
> > >that excessive voltage problem... hrm...
> > >Al
> > >
> > >----- Original Message -----
> > >From: "Allyn" <amalventano1@comcast.net>
> > >To: "scirocco list" <scirocco-l@scirocco.org>
> > >Sent: Thursday, August 22, 2002 12:33 PM
> > >Subject: alternator swap
> > >
> > >
> > >> the alternator (bosch rebuild, from prev owner,
> > unknown
> > >>purchase date) on the
> > >> wifes jetta is acting up. voltage goes to 12.8 on
> >
> > >>startup (actually charges
> > >> battery enough to start w/o jumping), but easily
> > gets
> > >>loaded down. headlights
> > >> and a/c are too much for it to handle, as voltage
> > drops
> > >>to the 10.5-11 range.
> > >> i've tried swapping brush+regulator assemblies
> > with no
> > >>luck. my guess is some
> > >of
> > >> the output rectifier diodes are toast and it
> > simply cant
> > >>put out the rated
> > >> current anymore.
> > >>
> > >> questions:
> > >> 1. this thing still has a bosch rebuild sticker
> > on it.
> > >>do they offer any kind
> > >of
> > >> warranty at all?
> > >> 2. what potential differences are there between
> > the
> > >>alternators on an 87 8v
> > >> jetta (with a/c), and an 87 scirocco 8v (w/o
> > a/c). they
> > >>look the same on the
> > >> outside, but will the scirocco alternator
> > possibly have
> > >>a lower current
> > >rating,
> > >> being non-a/c and all?
> > >>
> > >> thanks in advance for info,
> > >> Al
> > >>
> > >> Allyn Malventano, ETC(SS), USN
> > >> 87 Rieger GTO Scirocco 16v (daily driver, 180k,
> > rocco
> > >>#6)
> > >> 86 Kamei Twin 16V Turbo Scirocco GTX ('it has
> > begun',
> > >>rocco #7)
> > >> 86.5 Occo 16v Trailer (dotting 'i's across the
> > country,
> > >>rocco #8)
> > >> 87 Jetta 8v Wolfsburg 2dr (daily driver, 260k, 0
> > >>rattles, original clutch,
> > >> driveshafts, wheels :)
> > >>
> > >>
> > >> _______________________________________________
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> > >> Scirocco-l@scirocco.org
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> > >
> > >
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