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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 11-09-2012, 06:51 PM   #1 (permalink)
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Alternators.

What are people's opinions on what to do Alternator wise? I've been hearing some good stuff about the Sparx 3 phase system.

Just went over to my mate's house and mentioned it and he had a 3 phase stator, make unknown, that he just gave to me. Will it be worth fitting it with a 3 phase regulator/rectifier? I assume it'll produce more power? I guess a way to increase this further is to run the Sparx rotor. There are plenty of 3 phase regulator/rectifiers on ebay but I don't know if any of them would cope with the higher output with the Sparx rotor...

Did they fit a 3 phase as standard to any Triumphs? I can't find a make on it.
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Old 11-09-2012, 06:55 PM   #2 (permalink)
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Strike that, I can see it says Lucas on it.

So yeah, is it worth fitting it? Will it be better than the single phase unit?
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Old 11-10-2012, 06:49 AM   #3 (permalink)
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Is there a number on the edge? If there is you can see what power it might give here...
http://www.scribd.com/doc/102021181/Lucas-Stator-Log-4
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'69 T100S being rebuilt - very s-l-o-w-l-y - some say stopped!
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Old 11-10-2012, 07:02 AM   #4 (permalink)
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Cheers for that. The number of mine wasn't actually on there but it made me look for a number. I couldn't see one before, I wasn't looking hard enough!

Mine is a LU47244. Seems like a standard upgrade from later bikes. It's 180W instead of 120W.

Bargain for free!
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Old 11-10-2012, 09:18 AM   #5 (permalink)
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the 79 E's have a three phase
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Old 11-10-2012, 09:27 AM   #6 (permalink)
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Yeah I believe that is what mine must have come off. It seems that Sparx and others just copy the 3 phase Lucas one and try to sell it as better.

Ordered a Triumph 3 phase regulator/rectifier. I reckon I'll use my original rotor for now and see how it goes. I'm only running a Tri Spark so don't need insane power.
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Old 11-10-2012, 05:40 PM   #7 (permalink)
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Single phase or 3 phase,what is important is magnet strength.Make sure that if you put a screwdriver on the rotor,you can lift it with its own magnetism.
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Old 11-12-2012, 04:08 AM   #8 (permalink)
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You can get 3 phase 'high' output alternators and single phase 'high' output alternators.
The 3 phase is supposed to produce more power at lower revs. The single phase is fine if you ride mostly at cruising speeds. All T140 Triumphs were equipped with 3 phase from 1979. The cable looms are slightly different.
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Old 11-12-2012, 07:52 AM   #9 (permalink)
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Yeah cool. I have ordered the three phase regulator/rectifier and believe that comes with wiring instructions. In my mind it makes sense that it'll just have one extra wire. If it doesn't come with a diagram I'm sure there'll be one online somewhere

When I took the magnet off it was REALLY difficult because of how strong it was! I'll double check with the screwdriver but I think that's what I did when it first came off. Cheers for the info!
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Old 11-12-2012, 04:31 PM   #10 (permalink)
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Quote:
Originally Posted by loxx101 View Post
It seems that Sparx and others just copy the 3 phase Lucas one and try to sell it as better.
Exactly! There's nothing special about Sparx stuff, though they seem to have done a good job of making people think there is. In fact genuine Lucas is likely to be better as long as its still in decent nick.
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