alternator swap - resolution?

[amalventano1@comcast.net (Allyn)]

if the + line drops .6v and ground drops .8v, why would it matter if its at 2000
rpm or not? the wires/connections are bad either way :)
Al

----- Original Message -----
From: "Curt" <76Rocco@earthlink.net>
To: "Scirocco List" <scirocco-l@scirocco.org>; "Allyn"
<amalventano1@comcast.net>
Sent: Thursday, August 22, 2002 3:55 PM
Subject: Re: alternator swap - resolution?


> Checking battery ground cables is the first check to make on a car with
> electrical problems, Check for poor/corroded connections, ideal voltage drop
> should not exceed 0.2 volt across connections,  test from battery post to
> cable clamp(possible source of bad connection) and clean/replace if needed.
> test voltage drop from alt housing ground to engine/battery ground also.
>
>  "take some voltages at full load: +batt to +alt: .6
> > volts. -batt to -alt: .8 volts." Did you do this with a RPM of 2000? if
> not you need to retest doing so.
>
> If you need I can scan some test proceedures for you from an electrical
> diagnosis book (may be large size though for your e-mail?) Hope this helps.
>
> ----- Original Message -----
> From: "Allyn" <amalventano1@comcast.net>
> To: "John Erickson" <ranahan@charter.net>; "scirocco list"
> <scirocco-l@scirocco.org>
> Sent: Thursday, August 22, 2002 11:11 AM
> Subject: Re: alternator swap - resolution?
>
>
> > so, i did the swap. jumed in the jetta. fired it up. 13.3 volts (same
> alternator
> > that was just putting out 14.1 volts). hrm, this is odd. turn all
> accessories on
> > at once, promptly drops down to 12.3 volts. hrm. then the whole crappy vw
> wiring
> > thing pops into my head. take some voltages at full load: +batt to +alt:
> .6
> > volts. -batt to -alt: .8 volts. wouldnt ya know, my wires are crap. i
> wonder
> > what voltages are dropped by decent wires. anyone???
> > Al
> >
> > ----- Original Message -----
> > From: "John Erickson" <ranahan@charter.net>
> > To: "Allyn" <amalventano1@comcast.net>; "scirocco list"
> > <scirocco-l@scirocco.org>
> > Sent: Thursday, August 22, 2002 1:04 PM
> > Subject: Re: alternator swap
> >
> >
> > > 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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