<html><body>Hi Mark-great shot of you and your car racing-sorry I do not remember the pic on the Snowmass brochure but then that was sometime ago. The silver brochure does not have any of those photos. But I have everyone's autograph. Gosh DMH is gone 35 years now (7-3-23-his birthday he would be 125).<div><br></div><div>So here is the scoop on the generator (dynamo) pulley. There was an early dynamo issue in 1953 -Austin part 3H1834 (Lucas 22519). The later 1954 on to 100-6 uses generator 11K 100 (Lucas 22483). The Austin pulley is 1B1727. </div><div><br></div><div>In addition to the stamped number, the early unit measures 9-29/32" and the later measures 10-3/16. This has a different backplate and "oiler" when upgraded in 1954.</div><div><br></div><div>Checking my car, and as I suspected, a replacement generator dated 1958 has a 3.5" pulley. It appears that all units had a 3-1/2 pulley but Lucas sells it sans the pulley so Austin supplied it-part number above. The photo shown here, when I assembled the car in 2015, has the incorrect pulley mounted.</div><div><br></div><div>If your friend in Auckland has a smaller pulley he could have the early unit on the later car? Check the number on the generator body with a mirror. His, if correct for 1955, should be 3.5" and using the later Lucas dynamo number. Then too, he just could have the wrong damn pulley. Regards, Hank<br><br><div class="reply-new-signature"></div><p>-----------------------------------------</p>From: "Mark Donaldson" <ardmorebusiness@xtra.co.nz><br>To: "Hank Leach"<br>Cc: <br>Sent: Monday July 10 2023 3:24:33PM<br>Subject: RE: [Healeys] 100 generator pulley diameter<br><br>
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;color:#1F497D;">
Hello, Hank,</span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;color:#1F497D;">
</span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;color:#1F497D;">
A puzzle to which I suspect, I’ll never know the reason.</span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;color:#1F497D;">
When I rebuilt my 3000 race car engine recently I fitted a
generator because it is going to be road-registered.</span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;color:#1F497D;">
I fitted a slightly larger pulley to keep the generator revs just a
little lower.</span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;color:#1F497D;">
I do not plan on driving it at night, so full capacity charging
will not be an issue.</span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;color:#1F497D;">
</span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;color:#1F497D;">
That said, I used to race my BN2 40 years ago, but the wider pulley
was already on it.</span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;color:#1F497D;">
Like you, I have several Lucas charts too. Some of mine came
from Scott Morris. Very handy for reference.</span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;color:#1F497D;">
I also have many Lucas Parts Lists (hard copy) for all manner of
British vehicles, including cars, trucks, busses and
tractors. </span></p>
<p class="MsoNormal"><span style="color:#1F497D;"> </span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;">
Do you remember this photo on the back page of the Snowmass
booklet? </span></p>
<p class="MsoNormal"><span style="font-size:10pt;font-family:Tahoma, sans-serif;">
Me at the hairpin at Auckland’s Pukekohe Park race track in
1981. Kevin Faughnan liked the look of it. </span>
<span style="font-size:10pt;font-family:'Segoe UI Emoji', sans-serif;">
😊</span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;"> </span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;"><img width="641" height="494" style="width:6.675in;height:5.1416in;" src="/index.php/inbox/attachment/filenameOriginal/image002.jpg/filenamefs/INBOX61862f6fa556f6a759f3fd573282b521e9f7b" alt="INBOX61862f6fa556f6a759f3fd573282b521e9f"></span></p>
<p class="MsoNormal"><span style="color:#1F497D;"> </span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1pt;padding:3pt 0cm 0cm 0cm;">
<p class="MsoNormal"><b><span lang="en-us">From:</span></b>
<span lang="en-us">Hank Leach <gradea1@charter.net><br><b>Sent:</b> Tuesday, 11 July 2023 4:34 AM<br><b>To:</b> 'Mark Donaldson' <ardmorebusiness@xtra.co.nz><br><b>Cc:</b> 'Michael Salter' <michaelsalter@gmail.com>;
'Healey List' <healeys@autox.team.net><br><b>Subject:</b> RE: [Healeys] 100 generator pulley
diameter</span></p>
</div>
</div>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Guys-there are any number of aftermarket or
rebuilt generators over the years. Good chance that someone jazzed
up the generator to get more output by changing the size of the
pulley. I think that was the case with mine, as the car was raced,
so electrical output was important.</p>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12pt;">I will look up
the generator parts in the Lucas charts, but more than likely there
is no mention of diameter size. Hank</p>
<p>-----------------------------------------</p>
<p class="MsoNormal" style="margin-bottom:12pt;">From: "Mark
Donaldson"<br>
To: "Michael Salter"<br>
Cc: "Hank Leach", "Healey List"<br>
Sent: Sunday July 9 2023 8:57:14PM<br>
Subject: RE: [Healeys] 100 generator pulley diameter</p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1pt;padding:3pt 0cm 0cm 0cm;">
<p class="MsoNormal"><b><span lang="en-us">From:</span></b> <span lang="en-us">Michael Salter
<<a>michaelsalter@gmail.com</a>><br><b>Sent:</b> Monday, 10 July 2023 3:13 PM<br><b>To:</b> Mark Donaldson <<a>ardmorebusiness@xtra.co.nz</a>><br><b>Cc:</b> Hank Leach <<a>gradea1@charter.net</a>>; Healey
List <<a>healeys@autox.team.net</a>><br><b>Subject:</b> Re: [Healeys] 100 generator pulley
diameter</span></p>
</div>
<div>
<div>
<p class="MsoNormal">There is only
1 part number for all 100 generator pulleys so pretty unlikely that
there were different diameters. <span style="color:#1F497D;"> </span> <span style="font-family:Tahoma, sans-serif;color:#000099;">Agreed 1B
1727</span></p>
<div>
<p class="MsoNormal">Lots of
exchange generators back in the day.<span style="color:#1F497D;"> </span> <span style="font-family:Tahoma, sans-serif;color:#000099;">The car was
imported to NZ in 1964. Surely a generator wouldn’t have
packed up in just 8 years?</span></p>
</div>
<div>
<p class="MsoNormal">My BN2 which
is very close to yours has only 27K miles and the generator date is
correct 5 /56.</p>
</div>
<div>
<p class="MsoNormal">What is the
date on yours?<span style="color:#1F497D;"> </span>
<span style="font-family:Tahoma, sans-serif;color:#000099;">11
55 . . . and number 22483A, which is correct for
a BN2</span></p>
</div>
<div>
<p class="MsoNormal">M</p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;color:#000099;"> </span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;color:#000099;">I realise one
cannot always make an accurate measurement from a photo, but this
Moss repro pulley looks, to my eye, to be more than 3.25”
OD</span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;color:#000099;">Now I am totally
confused.</span></p>
<p class="MsoNormal"><span style="color:#1F497D;"> </span></p>
</div>
</div>
<div>
<div>
<p class="MsoNormal">On Sun., Jul.
9, 2023, 10:20 p.m. Mark Donaldson, <<a>ardmorebusiness@xtra.co.nz</a>>
wrote:</p>
</div>
<blockquote style="border:none;border-left:solid #CCCCCC 1pt;padding:0cm 0cm 0cm 6pt;margin-left:4.8pt;margin-top:5pt;margin-right:0cm;margin-bottom:5pt;">
<div>
<div>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;">Hank and Michael,</span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;">Thanks for your
replies.</span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;">Now I am curious. I am
99.9% sure my generator pulley is original. The car was sold new in
Guernsey in the Channel Islands. </span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;">It is BN2 232844
11 June 1956 and the engine has never been out of
the car, though I gave the generator a tidy-up 10 years
ago.</span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;">As Hank points out, it is
possible that various diameters may have been interchanged with
other models during 100 production.</span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;">So our local Auckland member with
a 3” OD pulley may well have the right one for his 1955
BN1</span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;">Michael, I’ll have him measure it
again to see if in fact it is a 3.2” pulley . . . and not
3”</span></p>
<p class="MsoNormal">
<b><span style="font-family:Tahoma, sans-serif;">Question:</span></b>
<span style="font-family:Tahoma, sans-serif;"> Might my 3½” OD
pulley be correct for a late production BN2?</span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;">Mark</span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;">Ardmore</span></p>
<p class="MsoNormal"><span style="font-family:Tahoma, sans-serif;">NZ</span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1pt;padding:3pt 0cm 0cm 0cm;">
<p class="MsoNormal"><b><span lang="en-us">From:</span></b> <span lang="en-us">Hank Leach <<a>gradea1@charter.net</a>><br><b>Sent:</b> Monday, 10 July 2023 5:22 AM<br><b>To:</b> 'Mark Donaldson' <<a>ardmorebusiness@xtra.co.nz</a>><br><b>Cc:</b> 'Healey List' <<a>healeys@autox.team.net</a>><br><b>Subject:</b> Re: [Healeys] 100 generator pulley
diameter</span></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12pt;">Hi Mark-had a
similar problem with my early 100. The pulley mounted to the
generator turned out to be the wrong one and the belt lineup was
askew. The correct one shown is I believe about 3.25"
and runs true. Since there were so many of these blocks used on
A70, A90 and other saloons of the period, I could see how they got
mixed up. Regards, Hank</p>
<p>-----------------------------------------</p>
<p class="MsoNormal" style="margin-bottom:12pt;">From: "Mark
Donaldson"<br>
To: "Healey List"<br>
Cc:<br>
Sent: Sunday July 9 2023 3:41:39AM<br>
Subject: [Healeys] 100 generator pulley diameter</p>
<div>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">Learned
gentlemen,</span></p>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">The pulley on my
1956 BN2 is 3½” diameter. I believe it to be original.
I’ve owned the car for 45 years.</span></p>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">A
friend has a BN1 with a pulley diameter of just 3”. He thinks
it is original. I don’t. It got me
thinking.</span></p>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">I
believe his is incorrect as it was converted here in NZ from a LHD
import some 30 years ago. BN1L 226180</span></p>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">The car has some
clumsy conversions made to change it to RHD, so I don’t know what
else might have been ‘cobbled up’ to get the car on the
road.</span></p>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">Can somebody of
you please confirm that 3½” is correct.</span></p>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">That said, I
need another for a second 100 engine I am building as a
spare.</span></p>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">They seem to be
scarce down here in NZ, and repros seem to be rather
expensive.</span></p>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">Fingers
crossed.</span></p>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">Mark</span></p>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">Ardmore</span></p>
<p class="MsoNormal"><span lang="en-us" style="font-size:10pt;font-family:Tahoma, sans-serif;">NZ</span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</ardmorebusiness@xtra.co.nz></div></body></html>