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I have a wonderful book on engine technology from Repco, of Repco Brabham
fame. This book goes into ignition timing theory very extensively and
taught me that the only way to really set ignition timing correctly is
through many hours of dynamometer testing through the complete range of
engine speeds and load settings.
As someone mentioned "silent ping" or resonance can be a killer of engines
and only through exhaustive testing can such issues be eliminated.
M
On Wed., May 26, 2021, 7:59 p.m. Michael Oritt via Healeys, <
healeys@autox.team.net> wrote:
> Richard--
>
> One method of "Old School" tsetting timing (at idle) is to put a glass of
> water on the valve cover and adjust the timing until the surface of the
> water is smooth and free of ripples. Aside from the fact that the valve
> cover on Healeys is not flat I question what a smooth idle has to do with
> WOT or high-end performance, but it does sound charming. Another is to
> retard until pinging occurs but I have heard and read that there is
> something called "silent pinging".
>
> When I set timing on my 100 I do it at high rpm's (2500 to 3000) with a
> light and look for 34-35 degrees of advance. Anything beyond that causes
> my engine to overheat and sometimes I will take a degree or two off that if
> engine temps suggest.
>
> Best--Michael Oritt
>
>
> I have heard (not seen) people
>
> On Wed, May 26, 2021 at 5:16 PM John Vrugtman via Healeys <
> healeys@autox.team.net> wrote:
>
>> way I used to do that was advance timing and test drive lugging in high
>> gear, when pinging started, it was time to retard slightly to avoid
>> pinging. Worked fine.
>>
>> JAV
>>
>> On 5/26/2021 4:08 PM, richard mayor wrote:
>>
>> Some additional info for you listers about my post. I do in fact have a
>> timing light. I actually have two. Please do not reply to me and tell me
>> what the factory spec is or what the total advance should be or anything
>> else you assume I don't know. I simply have a keen interest in knowing
>> about "old school" techniques and how to apply them.
>>
>> On Wed, May 26, 2021 at 11:10 AM richard mayor <boyracer466@gmail.com>
>> wrote:
>>
>>> There was a discussion at the Conclave tech session about ignition
>>> timing..... advancing the distributor to a certain point and then backing
>>> off a certain amount..... without using a timing light. I cannot remember
>>> the specific details but I would like to try it. Does anyone have the
>>> exact details of the procedure?
>>> Thanks, Richard
>>>
>>
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>>
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>>
>>
>> _______________________________________________
>> Support Team.Net http://www.team.net/donate.html
>> Suggested annual donation $12.75
>>
>> Archive: http://www.team.net/pipermail/healeys
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>>
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>>
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>>
>>
>
> --
> Best--Michael
> _______________________________________________
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>
--00000000000095aaf005c3453ff2
Content-Transfer-Encoding: quoted-printable
<div dir=3D"auto">I have a wonderful book on engine technology from Repco, =
of Repco Brabham fame. This book goes into ignition timing theory very exte=
nsively and taught me that the only way to really set ignition timing corre=
ctly is through many hours of dynamometer testing through the complete rang=
e of engine speeds and load settings.=C2=A0<div dir=3D"auto">As someone men=
tioned "silent ping" or resonance can be a killer of engines and =
only through exhaustive testing can such issues be eliminated.=C2=A0<div di=
r=3D"auto"><br></div><div dir=3D"auto">M</div></div></div><br><div class=3D=
"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed., May 26, 2021, =
7:59 p.m. Michael Oritt via Healeys, <<a href=3D"mailto:healeys@autox.te=
am.net">healeys@autox.team.net</a>> wrote:<br></div><blockquote class=3D=
"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding=
-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"color:#33=
33ff">Richard--</div><div class=3D"gmail_default" style=3D"color:#3333ff"><=
br></div><div class=3D"gmail_default" style=3D"color:#3333ff">One method of=
"Old School" tsetting=C2=A0timing (at idle) is to put a glass of=
water on the valve cover and adjust the timing until the surface of the wa=
ter is smooth and free of ripples.=C2=A0 Aside from the fact that the valve=
cover on Healeys is not flat I question what a smooth idle has to do with =
WOT or high-end performance, but it does=C2=A0sound charming.=C2=A0 Another=
is to retard until pinging occurs but I have heard and read that there is =
something called "silent pinging".</div><div class=3D"gmail_defau=
lt" style=3D"color:#3333ff"><br></div><div class=3D"gmail_default" style=3D=
"color:#3333ff">When I set timing on my 100 I do it at high rpm's (2500=
to 3000) with a light and look for 34-35 degrees of advance.=C2=A0 Anythin=
g beyond that causes my engine to overheat and sometimes I will take a degr=
ee or two off that if engine temps suggest.</div><div class=3D"gmail_defaul=
t" style=3D"color:#3333ff"><br></div><div class=3D"gmail_default" style=3D"=
color:#3333ff">Best--Michael Oritt</div><div class=3D"gmail_default" style=
=3D"color:#3333ff"><br></div><div class=3D"gmail_default" style=3D"color:#3=
333ff">=C2=A0=C2=A0</div><div class=3D"gmail_default" style=3D"color:#3333f=
f">I have heard (not seen) people=C2=A0</div></div><br><div class=3D"gmail_=
quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, May 26, 2021 at 5:16 P=
M John Vrugtman via Healeys <<a href=3D"mailto:healeys@autox.team.net"; t=
arget=3D"_blank" rel=3D"noreferrer">healeys@autox.team.net</a>> wrote:<b=
r></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex=
;border-left:1px solid rgb(204,204,204);padding-left:1ex">
=20
=20
=20
<div>
way I used to do that was advance timing and test drive lugging in
high gear, when pinging started, it was time to retard slightly to
avoid pinging.=C2=A0 Worked fine.<br>
<br>
JAV<br>
<br>
<div>On 5/26/2021 4:08 PM, richard mayor
wrote:<br>
</div>
<blockquote type=3D"cite">
=20
<div dir=3D"ltr">Some additional info for you listers about my
post.=C2=A0 I do in fact have a timing light. I actually have two.=
=C2=A0
Please do not reply to me and tell me what the factory spec is
or what the total advance should be or anything else you assume
I don't know.=C2=A0 I simply have a keen interest in knowing ab=
out
"old school"=C2=A0 techniques and how to apply them. <br>
</div>
<br>
<div class=3D"gmail_quote">
<div dir=3D"ltr" class=3D"gmail_attr">On Wed, May 26, 2021 at 11:10
AM richard mayor <<a href=3D"mailto:boyracer466@gmail.com"; tar=
get=3D"_blank" rel=3D"noreferrer">boyracer466@gmail.com</a>> wrote:<br>
</div>
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex=
;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir=3D"ltr">
<div>There was a discussion at the Conclave tech session
about ignition timing..... advancing the distributor to a
certain point and then backing off a certain amount.....
without using a timing light.=C2=A0 I cannot remember the
specific details but I would like to try it.=C2=A0 Does anyon=
e
have the exact details of the procedure?</div>
<div>Thanks,=C2=A0 Richard<br>
</div>
</div>
</blockquote>
</div>
<br>
<fieldset></fieldset>
<pre>_______________________________________________
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er">Healeys@autox.team.net</a>
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</pre>
</blockquote>
<br>
</div>
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et=3D"_blank">http://autox.team.net/archive</a><br>
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er">Healeys@autox.team.net</a><br>
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r>
<br>
</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
><font color=3D"#3333ff">Best--Michael</font></div>
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r>
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