Subject: [WPTA] Dwell angle adjustment

From: Ray Mihalko via Wpta <[email-masked]>
Date: Fri, 23 Dec 2022 03:37:01 +0000

All,
I recently gapped a new set of points to .015 mm, on the Spitfire then wanted to check the dwell angle.  My son and I checked the dwell this afternoon and found it to be slightly out of spec at 42.3 degrees. Spec shows 40-42 degrees. 

Does one take the vacuum advance hose off so it is a ‘true’ angle measurement?  Mine is connected and visually pulls a vacuum on the distributor.  Is this small amount mean there should be less or more of a gap?

Thanks for your help!
Ray Mihalko
Sent from my iPhone
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From: John Styduhar via Wpta <[email-masked]>
Date: Fri, 23 Dec 2022 08:05:48 -0500

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I think your measurement is in inches, not mm.  Vacuum line has to do with
ignition timing, not dwell angle, so there shouldn't be a change in the gap
unless your points plate is worn out.  I'd say your setting is spot on for
a Spitfire.

On Thu, Dec 22, 2022 at 10:39 PM Ray Mihalko via Wpta <[email-masked]>
wrote:

> All,
> I recently gapped a new set of points to .015 mm, on the Spitfire then
> wanted to check the dwell angle.  My son and I checked the dwell this
> afternoon and found it to be slightly out of spec at 42.3 degrees. Spec
> shows 40-42 degrees.
>
> Does one take the vacuum advance hose off so it is a =E2=80=98true=E2=80=
=99 angle
> measurement?  Mine is connected and visually pulls a vacuum on the
> distributor.  Is this small amount mean there should be less or more of a
> gap?
>
> Thanks for your help!
> Ray Mihalko
> Sent from my iPhone
> Unsubscribe/Manage <http://www.team.net/archiveUnsubscribe/Manage>:
> http://autox.team.net/mailman/options/wpta/[email-masked]
>
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small">I t=
hink your measurement is in=C2=A0inches, not mm.=C2=A0 Vacuum line has to d=
o with ignition timing, not dwell angle,=C2=A0so there shouldn&#39;t be a c=
hange in the gap unless your points plate is worn out.=C2=A0 I&#39;d say yo=
ur setting is spot on for a Spitfire.=C2=A0=C2=A0</div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Dec 22, 2022=
 at 10:39 PM Ray Mihalko via Wpta &lt;<a href=3D"mailto:[email-masked]=
">[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,20=
4);padding-left:1ex">All,<br>
I recently gapped a new set of points to .015 mm, on the Spitfire then want=
ed to check the dwell angle.=C2=A0 My son and I checked the dwell this afte=
rnoon and found it to be slightly out of spec at 42.3 degrees. Spec shows 4=
0-42 degrees. <br>
<br>
Does one take the vacuum advance hose off so it is a =E2=80=98true=E2=80=99=
 angle measurement?=C2=A0 Mine is connected and visually pulls a vacuum on =
the distributor.=C2=A0 Is this small amount mean there should be less or mo=
re of a gap?<br>
<br>
Thanks for your help!<br>
Ray Mihalko<br>
Sent from my iPhone<br>
_______________________________________________<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
t</a><br>
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<br>
<br>
</blockquote></div>

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