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drmini in aust
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PostPosted: Thu Dec 25, 2008 5:51 am 
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1970cooper wrote:
My 1970 cooper s mk2 built 7-70 has the 8tr regulator fitted.It's dated 5-70.
So are you guys saying that the 8tr is no longer available and the 4tr
is a substitute
Regards and merry christmas

That is my understanding, yes. :wink:
One other thing- I believe the 8TR had a voltage adjustment in back, the 4TR does not.

As I said in another thread be careful buying 4TRs, a Jag XJ6 one looks much the same but pinout is different.
Correct Mini pinout is B+, +, F, -.
The connector is the same for 4TR and 8TR.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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Bubbacluby
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PostPosted: Thu Dec 25, 2008 4:32 pm 
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Im fairly sure that clubman Gt's had a 8TR's also (dont quote me though) as i think Anton wanted an 8TR but had to settle for a 4TR. (71 models probably early 72) Mine is a late one so it is internally regulated

Yes i came across a lift up handled roundy panel van that had an 8TR.


brenton

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winabbey
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PostPosted: Thu Dec 25, 2008 7:53 pm 
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Mick wrote:
I repaired mine a few weeks ago. Didn't have to get too crazy with it however...the spade connectors are connected to the internal electronic wizardry by four braided copper leads. These are spot welded to the spade connectors and often corrode or get vibrated off.

To get to them you remove the tow rivets at the back and it will (literally) fall apart in your hands. The voltage regulator components themselves are immersed in silicone, but can be dug out if you need to. Well worth a looky.


Hi Mick - so it was just the corroded connections that was the problerm with your 8TR? How did you test it initially to confirm it wasn't working, and then once repaired? 'Suck it and see' or use some test instruments?

Doug
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Mick
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PostPosted: Thu Dec 25, 2008 8:25 pm 
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Location: Under the bonnet son!
I knew it was going to give me grief, the spades were loose, and small bits of copper fell out the bottom...

Don't throw them out. They can be repaired!

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goodie
PostPosted: Fri Jul 28, 2017 12:18 pm 
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Reviving an old thread :shock: :lol: , has anybody had any luck repairing these 8TR regs , or know of anyone that can ?, ( not unless you want to do a couple Mick :wink: ) or do we just replace it with the plastic 4TR .
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ausdino
PostPosted: Fri Jul 28, 2017 12:52 pm 
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Useful information, maybe ?
For 8TR
http://www.collection.archivist.info/searchv13.php?searchv4page=1&searchstr=Lucas+8tr
For 4TR
http://www.collection.archivist.info/searchv13.php?searchstr=Lucas+4tr

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1970 Mk2 Cooper S under restoration
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simon k
PostPosted: Fri Jul 28, 2017 2:54 pm 
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ausdino wrote:
Useful information, maybe ?
For 8TR
http://www.collection.archivist.info/searchv13.php?searchv4page=1&searchstr=Lucas+8tr
For 4TR
http://www.collection.archivist.info/searchv13.php?searchstr=Lucas+4tr



that would be handy, if it had the component values.... it's only a simple circuit.

goodie wrote:
has anybody had any luck repairing these 8TR regs


When I go back to a standard alternator I need to make a new circuit for mine because I blew it up, but until then, no

but if you have a dead one, send it to me

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miniimports
PostPosted: Fri Jul 28, 2017 7:54 pm 
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Think ive cornered the market on 8tr s might be millionaire with the cooper s tax :mrgreen: https://www.flickr.com/photos/157123296@N05/36051448432/in/dateposted-public/
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goodie
PostPosted: Fri Jul 28, 2017 8:29 pm 
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Not looking to part with a working one are you Josh ?
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miniimports
PostPosted: Fri Jul 28, 2017 9:42 pm 
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happy to part with any of them as ive got no cars to put them on anymore
just dont know if they work unfortunately as havent got anything to test them on
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Bubbacluby
PostPosted: Fri Jul 28, 2017 10:43 pm 
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miniimports wrote:
happy to part with any of them as ive got no cars to put them on anymore
just dont know if they work unfortunately as havent got anything to test them on
I would like one especially if you had one dated during 71.

My GT one was missing

Sent from my SM-G935F using Tapatalk

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miniimports
PostPosted: Sat Jul 29, 2017 9:49 am 
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3 are 3/ 71
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