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<p>When I had crank fire ignition I did test it on the dyno and
found that a slight retard as RPM's went up helped (at least
that's how I remember it - up to 34 / 35 at 3000 rpm but down to
32 at 6000). But with my more vintage points system, the advance
is "all in" at 3000 rpm. I just set to 30 degrees or 32 degrees
or if I'm feeling particularly lucky / brave / stupid 34 degrees
at max. Whatever it ends up at low rpm is where it ends up. When
racing I'm never under 3000 RPM anyway.</p>
<p>Regards, Tony<br>
</p>
<div class="moz-cite-prefix">On 3/19/2021 5:27 PM, timmmurphh--- via
Fot wrote:<br>
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<p class="MsoNormal">What advance curve are folks using in their
race engines? I have 87mm pistons, a Kastner G3 cam and about
a 12:1 compression ratio. I am using about 19 degrees advance
at idle (no centrifugal advance) and 30 degrees advance at
3000 RPM. I don’t know what I have at higher RPM’s because I
never looked. I’m currently doing an engine rebuild so I will
have to look what I’ve got at the higher RPM’s when I get the
engine running. I’m curious as to what others are using and if
anyone has done any testing on a dyno with different advance
curves.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance for your input.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Tim Murphy<o:p></o:p></p>
<p class="MsoNormal">#317 BRG TR4<o:p></o:p></p>
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