Frank :
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.
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>
BTW, the wiper motor is only supposed to draw 4 amps, ISTR that the fuel
pump is similar.
Cheers
Randall
59 TR3A daily driver - with a 65 amp Ford alternator
On Thursday, September 23, 1999 5:06 PM, frank
[SMTP:frank@ssabsa.sa.gov.au] wrote:
>
> 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...).
>
> We put on a Bosch unit from a Chrysler (not sure what model as it
> was just lying around after someone's engine rebuild), replaced
> the bearings, cleaned up the slip rings, and fitted an internal
> regulator (which includes new brushes) for AUS$40. The only
> difficulty was grinding the spacers on the mouting bracket to fit
> and get the pulley to line up, and that wasn't difficult. The result
> is a 55 amp alternator, which seems to do a sterling job of charging
> the battery - the headlights don't even go dim at idle, and the
> voltage never drops below 12.7V or so with every accessory & main
> beam on, even at idle. I think that's a fairly decent mod. to make...
> OK it's not original, but if that means I don't have to replace my
> battery again, then that's alright with me.
>
> Frank Biedermann
> '69 TR6
> Adelaide
> AUSTRALIA
>
> Adrian Dix-Dyer wrote:
>
> > In the UK I believe TR6's were fitted with a Lucas 17ACR unit with
built
> in
> > regulator. In fact virtually all British mainline production cars were
> > fitted with this type of alternator from the early seventies for many
> years.
> > They are plentiful secondhand or reconditioned in UK and available from
?
> 10
> > or so. It may be worth the shipping to US of A???
> > Regards
> > Dixie TR4A CT 64306
>
> <--- Snip --->
>
> > Which of you knows what alternator I need?
> > The next step will be electronic ignition,,,so be on the lookout for my
> > question and have your answers ready.
> > Thanks, :-)
> > JS
> >
>
>
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