Randall Young wrote:
> I'm inclined to agree with you, but it seems many people
> aren't comfortable
> with modifying mounts, redoing wires, etc.
>
> The 15ACR is rated 28 amps, which is marginal but adequate.
> The 17ACR is
> rated 36 amps, which should be enough even with some
> electrical additions
> (fog lights, stereo, etc.), and should drop right in. I
> don't have specs
> handy for the 21ACR, but the 20ACR is rated 66 amps, so the
> reasonable
> assumption is that the 21 is even higher.
OK, so my memory failed me yet again (damn that alcohol). I suspect
that there was a bit more wrong with the old alternator than I
mentioned in my previous post - dad seems to think that one of
the diodes in the AC->DC rectifier circuits was stuffed, which
meant that I was only getting 2/3 charging current. Even without
that problem, I still think 28 amps is a bit whimpy too.
>
> Of course, it depends a lot on what is available. Here in
> the US, there
> aren't a great many Lucas alternators "just lying around" <g>
>
I did ring a few auto electricians here in Adelaide, but the only
responses I managed to get out of them were either chuckles or
full on belly laughs (followed by "No, sorry, we can't get them,
and we don't know who can... what sort of car have you got again?").
> BTW, the wiper motor is only supposed to draw 4 amps, ISTR
> that the fuel
> pump is similar.
>
To my mind 4 amps is quite a bit of current for a fuel pump to
draw, and by the feel of the fuel pump after driving around for
a while, most of the power so consumed is radiated via heat.
Anyone need a 48 watt heater, that smells slightly of petrol?
There goes the memory again - I'm the one who needs one of those
otherwise my car won't run.
Regards,
Frank Biedermann
69 TR6 PI
Adelaide
AUSTRALIA
> >
> > I'm not sure why anyone (except for concours people) would like to
> > fit a "good as new"/rebuilt Lucas 15/17/21 ACR alternator to their
> > TR6, as they're pretty whimpy in terms of output. My 1969 TR6 had
> > (yes, past tense, my brother and I replaced it on the weekend) a
> > 15ACR, which outputs (I think) a whole 18 amps max. That's pretty
> > pathetic given that the headlights will take about 10 amps by
> > themselves, plus being a PI it has an electric fuel pump which
> > draws some indecent amount of current (which is probably
> > understandable given that the motor is a wiper motor...).
> >
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