alternator swap - resolution?

[76Rocco@earthlink.net (Curt)]

Because he is testing Charging System "Full Load" for accurate voltage drop
test measures this needs done at 2000 RPM.
----- Original Message -----
From: "Allyn" <amalventano1@comcast.net>
To: "Curt" <76Rocco@earthlink.net>; "Scirocco List"
<scirocco-l@scirocco.org>
Sent: Thursday, August 22, 2002 1:13 PM
Subject: Re: alternator swap - resolution?


> 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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