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Dynamo + Voltage regulator - (Read 2,936 Times)
 
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Martin
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Post Icon Posted: Jun 16th, 2009 at 03:51 pm

I've a 1962 BT7, which has just been on an epic (!) trip to Le Mans.

1 of the problems encountered = lack of charge, hence suspect dynamo and/or voltage reg.

Any advice re checks / rebuilds / where to purchase / etc. much appreciated.

Thanks,

Martin
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healeyhundred
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Post Icon Posted: Jun 16th, 2009 at 05:45 pm

Martin

I do recall that my AH100 workshop manual goes into some detail on testing the charging system and especially the voltage regulator, though I haven't got it to hand. I did find an article on testing that may be useful here http://www.mgaguru.com/mgtech/electric/et121.htm.

As for buying a new one, AH Spares list them for £19.50 plus VAT & delivery, which seems pretty reasonable.

Good luck.

James
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1956 Austin-Healey 100 (BN2), Derbyshire UK
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Post Icon Posted: Jun 16th, 2009 at 07:03 pm

Martin, how you use your car, and your views on originality greatly affect your best options. If you are planning on doing lots of long distance runs and you aren't concerned about originality, then an alternator would be your best bet. If you want it to look original, then you can get the alternators which are built in dynamo carcases, and even keep the look of the regulator, but this route is far more costly. If you are determined to keep the car original, then I would recommend you try to look for New old stock parts for things such as regulators, as they are likely far better quality than the modern equivalent chinese repros
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1965 Austin Healey 3000 Mk3 in bits, Stoke-on-Trent, UK

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Post Icon Posted: Jun 17th, 2009 at 12:41 pm

There's an article here http://www.traction-owners.co.uk/tech/Propsting/Voltage%20Regulator.pdf about setting up regulators and I know the Sprite Haynes manual gives instructions so I guess big Healey manuals do as well.

John
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ribbit
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Post Icon Posted: Jun 17th, 2009 at 01:33 pm

I discovered a company at a classic car show last month that does alternators which are cased to look like dynamos - might be a good compromise between originality and practicality. If you are interested I will hunt out the guy's business card when I get home tomorrow.

I have an alternator on my frog and it makes a big difference in terms of the power you can give to headlights etc. As in you can actually see something with them. Smiley

Cheers R.
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Austin-Healey Frogeye Sprite MkI 1275cc
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Post Icon Posted: Jun 17th, 2009 at 02:11 pm

Jun 17th, 2009 at 01:33 pm, ribbit wrote:
I have an alternator on my frog and it makes a big difference in terms of the power you can give to headlights etc. As in you can actually see something with them. Smiley

Cheers R.


That's the problem with having a 1275! With a 948 you never go fast enough to worry about seeing very far Smiley

« Last Edited by Admin Jun 18th, 2009 at 03:55 pm »
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Post Icon Posted: Jun 18th, 2009 at 11:28 am

I remember being told some time ago that alternators needed a lot more cooling than dynamos, so those which were fully enclosed could suffer overheating problems. Whether that's true of current models (if it ever was !), I don't know.
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1959 A-H 3000 Mark 1 BT7, blue over white. Used as often as possible, which is not often enough. Zummerzet, England.
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Post Icon Posted: Jun 18th, 2009 at 04:23 pm

As promised, here are the details from the guy's business card:

Classic & Vintage Dynamos Ltd
Electrical Remanufacturers
Specialists in Classic, Veteran and Vintage
Shirebrook, Notts
Tel/Fax 01623 747666
One Year's Guarantee

They ones he had one display at Capesthorne (in Cheshire - he obviously gets about a bit!) looked well made and very solid.

Unfortunately no website, but you may be able to have a look at his wares at a car show nearer you.

Just to re-iterate - this is not a recommendation - I have no connection with them and no experience of their products, other than seeing them on display.

Regarding cooling - as all the electronics are mounted on the back, they probably do need cooling and all the normal alternators I've seen had rotating vanes on the back for this purpose - I can't remember whether the dynamo styled ones had this.

Cheers R.

« Last Edited by ribbit Jun 18th, 2009 at 04:26 pm »
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Post Icon Posted: Jun 18th, 2009 at 04:29 pm

Same sort of stuff here

http://www.cambridgemotorsport.com/shop_category.cfm/category_id/167

Loadsamoney Smiley
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