[Fot] What alternators are you using on a Spitfire?
TeriAnn J. Wakeman
tjwakeman at gmail.com
Mon May 19 14:02:50 MDT 2025
While on the subject of alternators ...
Once upon a time, a couple decades past I purchased an alternator
conversion kit from a Morgan parts house for my TR3. About 7 or 8 years
ago it failed while I was near Laughlin NV. I had a local shop fix it.
They replaced my 3 wire alternator with a single wire system that used
the wire going to the idiot light to charge the battery. For the past
few years the alternator output didn't start charging until I hit about
2000 RPM and didn't go to a full 15V charge unless the engine was
turning 3200 RPM or better. The 2 wire connector on the side of the
alternator has a wire they never connected to anything.
I've been tempted to replace the alternator with a 3 wire system that
starts charging when it is supposed to but have no idea which alternator
to buy.
I never wrote down the number or ID of the alternator I purchased from
the Morgan shop and forgot which shop it was. I've only worked with
Delco 10 & 12SI alternators and what's in there appears slightly smaller.
So what is a good 3 wire alternator that fits a TR3 bay? I have an
electric fan so I would guess 60 AMPS would be more than enough for the
fan, headlamps, and a pair of aux lamps.
Suggestions?
TeriAnn
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