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Simon -
You'll need to do a roadside timing. With contacts, it's easy because you
can twist the dizzy until you see the contacts open at TDC, then start the
car and advance the dizzy a bit until you get smooth running. Usually
that's pretty accurate to within a couple degrees.
Since you have a pertronix, I would recommend fitting the dizzy first and
using a timing gun figure out where it's supposed to be, then make a mark
at the bottom of the dizzy with a permanent marker so that you can just pop
it in the right spot if you ever get in trouble.
Best,
Alan
On Mon, Mar 27, 2023 at 4:04=E2=80=AFAM Simon Lachlan via Healeys <
healeys@autox.team.net> wrote:
> I should probably be able to work this out for myself, but =E2=80=93 just=
to be
> sure =E2=80=93 I=E2=80=99m asking the experts.
>
> Talking about a Lucas DM6a in a MkII BT7. And a 123 alternative.
>
>
>
> So, I have a 123 installed in the car and a Lucas DM6A, complete with
> Pertronix, in the boot. (Trunk!) Yes, both distributors have the correct
> =E2=80=9CDrive dog(?)=E2=80=9D on the bottom. (Part 25 in the attached pi=
c).
>
> Thus, it is mechanically possible to remove the 123 and drop in the Lucas
> in its place.
>
>
>
> My question is this=E2=80=A6=E2=80=A6if I manage to accomplish this witho=
ut messing up the
> timing ie rotating the distributors in the clamp, will everything line up
> and the engine fire up?? I hope that the Drive dog will/can only slot int=
o
> one position and that will be the one and only correct position. If you s=
ee
> what I mean?
>
>
>
> I hope to be able to carry the Lucas as a spare =E2=80=9Cget you home=E2=
=80=9D and,
> likewise, hope that it=E2=80=99s a straight swap without having to frig =
around
> with the timing.
>
>
>
> Am I correct? It=E2=80=99ll be a straightforward swap or will it turn int=
o a
> complicated roadside tune-up??
>
>
>
> Thanks,
>
> Simon
>
>
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<div dir=3D"ltr">Simon -<div><br></div><div>You'll need to do a roadsid=
e timing.=C2=A0 With contacts, it's easy because you can twist the dizz=
y until you see the contacts open at TDC, then start the car and advance th=
e dizzy a bit until you get smooth running.=C2=A0 Usually that's pretty=
accurate to within a couple degrees.<br><br>Since you have a pertronix, I =
would recommend fitting the dizzy first and using a timing gun figure out w=
here it's supposed to be, then make a mark at the bottom of the dizzy w=
ith a permanent marker so that you can just pop it in the right spot if you=
ever get in trouble.<br><br>Best,<br><br>Alan</div></div><br><div class=3D=
"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Mar 27, 2023 at=
4:04=E2=80=AFAM Simon Lachlan via Healeys <<a href=3D"mailto:healeys@au=
tox.team.net">healeys@autox.team.net</a>> wrote:<br></div><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid=
rgb(204,204,204);padding-left:1ex"><div class=3D"msg7369389827087795963"><=
div lang=3D"EN-GB"><div class=3D"m_7369389827087795963WordSection1"><p clas=
s=3D"MsoNormal">I should probably be able to work this out for myself, but =
=E2=80=93 just to be sure =E2=80=93 I=E2=80=99m asking the experts.<u></u><=
u></u></p><p class=3D"MsoNormal">Talking about a Lucas DM6a in a MkII BT7. =
And a 123 alternative.<u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=
=A0<u></u></p><p class=3D"MsoNormal">So, I have a 123 installed in the car =
and a Lucas DM6A, complete with Pertronix, in the boot. (Trunk!) Yes, both =
distributors have the correct =E2=80=9CDrive dog(?)=E2=80=9D on the bottom.=
(Part 25 in the attached pic).<u></u><u></u></p><p class=3D"MsoNormal">Thu=
s, it is mechanically possible to remove the 123 and drop in the Lucas in i=
ts place.<u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><=
p class=3D"MsoNormal">My question is this=E2=80=A6=E2=80=A6if I manage to a=
ccomplish this without messing up the timing ie rotating the distributors i=
n the clamp, will everything line up and the engine fire up?? I hope that t=
he Drive dog will/can only slot into one position and that will be the one =
and only correct position. If you see what I mean?<u></u><u></u></p><p clas=
s=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">I hope to be=
able to carry the Lucas as a spare =E2=80=9Cget you home=E2=80=9D and, lik=
ewise, hope that it=E2=80=99s a=C2=A0 straight swap without having to frig =
around with the timing.<u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=
=A0<u></u></p><p class=3D"MsoNormal">Am I correct? It=E2=80=99ll be a strai=
ghtforward swap or will it turn into a complicated roadside tune-up??<u></u=
><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoN=
ormal">Thanks,<u></u><u></u></p><p class=3D"MsoNormal">Simon<u></u><u></u><=
/p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p></div></div>_____________=
__________________________________<br>
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