TR6 TR6 alternator conversion

[bailee2]

Ok, I give up. I know I've read about higher output TR6 alternator conversions on this forum but I can not get the search engine to find it?

My second rebuilt alternator died and the vendor does not want to do Triumph any longer (Advanced Auto).

It is for a 1972 TR6 with two plug connections.

Any help would be appreciated. I think I want to go with something smaller, higher output etc.

1972 TR6
1959 TR3A
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[2wrench]

Bailee: From the show me State. Somebody will be
along, I am sure. Hang in there.

 

[TR3driver]

There are several ways to go. I don't recall reading any nice articles on using one of the newer 'mini' alternators, but I know a lot of the racing folk are using them.

But if you are just looking for a little more output (especially at idle), the easiest conversion has to be the Bosch alternator from a 78-80 Ford Fiesta (with optional Bosch alternator). Bolts right on, has the same plug, etc. And should be available (tho perhaps special order) through Advance Auto.

Several good articles at :
https://www.vtr.org/maintain/alternator/conversions.shtml

 

[tr6lover]

hi bailee, where in missouri are you? im home in new england for the holidays, but i now live in st louis and will be back soon if you want to see the conversion for yourself. i did the gm conversion and could help you if you needed it. its a 63 amp alt. and it made a world of difference. just drop me a pm
Randy

 

[davidk]

I installed a GM alternator using the VTR instructions given above. I have been very pleased with it. I did have to do some grinding on the alternator, and change the connector to GM, but it wasn't difficult and it works well.

 

[LastDeadLast]

Bailee2,

I've got the Bosch mentioned above and it's a direct fit; it even uses the same fan belt. Mine is a 72, but I had to get a wiring plug kit from Moss (part number: 540-280) for like $6. The installation was pretty simple.

For safety sake, I ran an extra 8 gauge wire from the output of the alternator to the battery terminal on the starter. I did this just in case the battery gets drained and the alternator starts charging at full blast..., a happening that would probably melt the factory wiring.

If you have any questions, just ask.

 

[bailee2]

Thanks I appreciate the quick responses.

I am leaning towards the Bosch.

Happy New Year!
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[tdskip]

Guys - is this is Bosch unit?

Scroll down...

https://www2.partstrain.com/v5/products.php?N=11809+1726+4294966746&Ntt=alternator

 

[LastDeadLast]

Not the Bosch that we're talking about.. I think it's a 55 or 50 amp unit. From a 1980 Ford Fiesta.

 

[TR3driver]

/bcforum/images/%%GRAEMLIN_URL%%/iagree.gif The Fiesta unit doesn't have that plastic cover on the back.

 

[LastDeadLast]

Thats it.

 

[tdskip]

This one?

https://www.rockauto.com/catalog/x,carcode,1128293,parttype,2412

Specifically, ACDELCO Part # 3341058 {55 AMP #19134051}
GENERATOR,(REMAN) BOSCH EF (55 AMPS)

or

https://www.thepartsbin.com/catalog/produ...gory=alternator

 

[tdskip]

Also found this for those of us (like me) who have a 5 plug.

 

[TR3driver]

This one?

https://www.rockauto.com/catalog/x,carcode,1128293,parttype,2412

Specifically, ACDELCO Part # 3341058 {55 AMP #19134051}
GENERATOR,(REMAN) BOSCH EF (55 AMPS)

That looks right.
<div class="ubbcode-block"><div class="ubbcode-header">Quote:]

https://www.thepartsbin.com/catalog/produ...gory=alternator

[/QUOTE]I don't see one on that page that looks right to me. The standard alternator for the Fiesta was a Motorcraft unit with a solid 'foot' rather than two tabs (and different brackets). Although you could probably make it work, it's a much more difficult operation than the (optional) Bosch unit. Likewise that 'standard' Ford externally regulated unit (which is what I have on my TR3A) is more difficult.

 

[tdskip]

Thanks Randall.

so given a choice between rebuilding an original 5 plug or buying the replacement Bosch unit is their any reason (except for originality) to have the original one rebuilt?

 

[bailee2]

[/quote]I don't see one on that page that looks right to me. The standard alternator for the Fiesta was a Motorcraft unit with a solid 'foot' rather than two tabs (and different brackets). Although you could probably make it work, it's a much more difficult operation than the (optional) Bosch unit.

This is the one (Motorcraft) they sold me as a Bosch
unit and it would take some careful machining to make it work. So I guess I need to take it back and try for a Bosch unit.
The Motorcraft unit also has screw terminal rather than plug-in.
Thanks.
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[Brosky]

Randall,

I just ordered one of those from NJ. I paid more than for the NAPA unit, but I like the finish on the unit from Precision Parts and Remanufacturing Co. I had to go through a dealer and then they will drop ship it to me.

Lifetime warranty on these units according to the dealer.

https://www.pprok.com/

 

[TR3driver]

so given a choice between rebuilding an original 5 plug or buying the replacement Bosch unit is their any reason (except for originality) to have the original one rebuilt?

Sorry I didn't see this before ... IMO No, no reason other than originality to have the Lucas rebuilt rather than going with a conversion.

Thanks for the rebuilder link, Paul.

 

[GT6_Mark]

Does anyone have the Bosch part number for the "Fiesta" unit? Thanks. Mark

 

[mabbott]

Here is the NAPA reman part number that I used on my 73 TR6.
BA 1860137. It was about $100. plus $5. core charge.

It bolted right up with the original spacers and same connector. It may or may not come with a pulley and the diameter of the pulley shaft is different than the original Lucas unit. My parts place put on a new pulley at N/C since their picture on their computer showed a pulley.