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<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial>Mark,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial>This may be more information about v-belt pulleys than you
ever wanted to know but my Healey engine is in pieces and the measurements
are easy to get. All this information is based on Healey 3000 29D
series engine built in approximately October 1960. The Mk2 engines were 29E
series but as long as your car was equipped with a Lucas C45 Dynamo the
information should be the same for both engines.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial>Driving pulley diameter (crankshaft) is
157mm.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial>Driven pulley diameter (Dynamo) is 99mm.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial>Speed of driven pulley = Engine RPM x 157 / 99. If the engine
RPM is 2500 then the Dynamo RPM is 3,965</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial>With the 110mm driven pulley if the engine RPM is 2500 then
the Dynamo RPM is 3,568.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial>The Dynamo will be 10% slower with the 110mm pulley but I
suspect the real issue is the Dynamo output at low engine RPM's. I don't have
any information on the size of the crankshaft pulley on the 100/6 but if it
was the same 157mm pulley used on the 29D series and later engines then the
switch to the smaller 99mm pulley was to improve the output of the Dynamo at low
engine speeds. The only adverse effect will likely be your headlights will be
dimmer at low engine RPM.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=002015016-11062017><FONT color=#0000ff
size=2 face=Arial>I trust this helps.....Harold</FONT></SPAN></DIV><FONT
color=#0000ff size=2 face=Arial></FONT><BR>
<DIV lang=en-us class=OutlookMessageHeader dir=ltr align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> Healeys
[mailto:healeys-bounces@autox.team.net] <B>On Behalf Of </B>Mark
Donaldson<BR><B>Sent:</B> Saturday, June 10, 2017 7:22 PM<BR><B>To:</B>
healeys@autox.team.net<BR><B>Subject:</B> [Healeys] Generator pulley
dimensions<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">Listers,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">Until now I'd never noticed the
small differences in generator pulley diameters.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">What is the diameter of the pulley
fitted to a Mk II tri-carb - part number AEC 910 ?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">The one presently fitted to mine is
100mm. It does not have a part number on it.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">I have a 100/6 pulley with part
number AEC 291 sitting on my shelf. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">It shows the part number on the
casting and has a diameter of 110 mm. (see photo
attached.)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">As a matter of interest - could the
100/6 pulley be used on a later model without adverse effect - bearing in mind
the generator speed would be only marginally
reduced.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">Mark<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><FONT size=2
face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">Ardmore</SPAN></FONT></st1:place></st1:City><FONT
size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=2 face=Tahoma><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">NZ<o:p></o:p></SPAN></FONT></P></DIV></BODY></HTML>