Re: [TR] TR3 distributor

[Geo Hahn <ahwahneetr@gmail.com>]

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Andrew -

I believe the 40698A was used on most TR3As and TR4s, the 40795A on TR4As.

Both the curves and vacuum advance are different -- but I am not sure how
critical those differences are.  As I recall the 40795A has a lower total
advance.

Lots of details here:

http://mgaguru.com/mgtech/ignition/pdf/lucas_distributor_specs.pdf

That said, my late-TR4 came to me with a 40795A on it - possibly original -
and I have never changed it.

Geo

On Wed, Aug 12, 2015 at 6:54 AM, Andrew Uprichard <auprichard@uprichard.net=
>
wrote:

> List:  what is a =E2=80=9Ccorrect=E2=80=9D distributor for a TR3A: I have=
 a couple here:
> one marked DM2, 40698A, and  the other 25D, 40795A.  Does it really matte=
r?
>
> Andrew UPrichard
>
>
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<div dir=3D"ltr"><div>Andrew -</div><div><br></div><div>I believe the 40698=
A was used on most TR3As and TR4s,=C2=A0the 40795A on TR4As.</div><div><br>=
</div><div>Both the curves and vacuum advance are different -- but I am not=
 sure how critical those differences are.=C2=A0 As I recall the 40795A has =
a lower total advance.</div><div><br></div><div>Lots of details here:</div>=
<div><br></div><div><a href=3D"http://mgaguru.com/mgtech/ignition/pdf/lucas=
_distributor_specs.pdf">http://mgaguru.com/mgtech/ignition/pdf/lucas_distri=
butor_specs.pdf</a></div><div><br></div><div>That said,=C2=A0my late-TR4 ca=
me to me with a 40795A on it - possibly original - and I have never changed=
 it.</div><div><br></div><div>Geo</div></div><div class=3D"gmail_extra"><br=
><div class=3D"gmail_quote">On Wed, Aug 12, 2015 at 6:54 AM, Andrew Upricha=
rd <span dir=3D"ltr">&lt;<a href=3D"mailto:auprichard@uprichard.net"; target=
=3D"_blank">auprichard@uprichard.net</a>&gt;</span> wrote:<br><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;=
padding-left:1ex"><div lang=3D"EN-US" vlink=3D"purple" link=3D"blue"><div><=
p class=3D"MsoNormal">List:=C2=A0 what is a =E2=80=9Ccorrect=E2=80=9D distr=
ibutor for a TR3A: I have a couple here: one marked DM2, 40698A, and=C2=A0 =
the other 25D, 40795A.=C2=A0 Does it really matter?<span class=3D"HOEnZb"><=
font color=3D"#888888"><br><br>Andrew UPrichard<u></u><u></u></font></span>=
</p></div></div><br><br>
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<br></blockquote></div><br></div>

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