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I'm not saying all advance is used at idle, but what I'm saying is that
when all the mechanical advance is used, you're at a different advance
setting than before (you had to change the timing after changing the
springs, so when you do that the full advance amount changes
correspondingly). I'm unclear which direction it changed. Your "at
3200 RPM" observation would almost always be at full advance regardless
of which springs you're using.
Stiffer springs should equate to less advance at idle than before I'd think.
Regards, Tony Drews
On 2/28/2020 8:09 PM, Peter Arakelian wrote:
> Tony, if I follow you correctly, you are saying that by changing the
> springs I may have made it so that all the mechanical advance is used
> up at idle and I may have no more at speed. Where with the older
> springs I would get mechanical advance later in the rpms and so have
> more advance at speed.
> Would the marking on the weight of 13 degrees indicate its maxium
> advance? If so, I suspect I may in fact be using all the mechanical
> at idle since my idle timing jumped past the pully markings and I can
> only estimate a 10-15 degree jump. Maybe I should go back to the old
> springs.
> >>The springs should just change what RPM it takes to get to full advance
> but the full advance should be the same (weights against the stops).?
> I'm a little unclear on how much you changed the timing, it sounds like
> you had to retard the timing after the spring replacement - this would
> also retard the "all in" timing, which would be what you're running at
> 3200 RPM.? It's possible it's worse at 3200 now than it was before
> because the full advance timing is now less.<<
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<p>I'm not saying all advance is used at idle, but what I'm saying
is that when all the mechanical advance is used, you're at a
different advance setting than before (you had to change the
timing after changing the springs, so when you do that the full
advance amount changes correspondingly). I'm unclear which
direction it changed. Your "at 3200 RPM" observation would almost
always be at full advance regardless of which springs you're
using.</p>
<p>Stiffer springs should equate to less advance at idle than before
I'd think.</p>
<p>Regards, Tony Drews<br>
</p>
<div class="moz-cite-prefix">On 2/28/2020 8:09 PM, Peter Arakelian
wrote:<br>
</div>
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<div>Tony, if I follow you correctly, you are saying that by
changing the springs I may have made it so that all the
mechanical advance is used up at idle and I may have no more at
speed. Where with the older springs I would get mechanical
advance later in the rpms and so have more advance at speed.</div>
<div>Would the marking on the weight of 13 degrees indicate its
maxium advance? If so, I suspect I may in fact be using all the
mechanical at idle since my idle timing jumped past the pully
markings and I can only estimate a 10-15 degree jump. Maybe I
should go back to the old springs.</div>
<div>Â </div>
<div><span style="font-family: "Calibri",sans-serif;
font-size: 11pt; mso-ascii-theme-font: minor-latin;
mso-fareast-font-family: "Times New Roman";
mso-hansi-theme-font: minor-latin; mso-bidi-font-family:
"Times New Roman"; mso-bidi-theme-font: minor-bidi;
mso-ansi-language: EN-US; mso-fareast-language: EN-US;
mso-bidi-language: AR-SA;">>>The springs should just
change what RPM it takes to get to full advance <br>
but the full advance should be the same (weights against the
stops).? <br>
I'm a little unclear on how much you changed the timing, it
sounds like <br>
you had to retard the timing after the spring replacement -
this would <br>
also retard the "all in" timing, which would be what you're
running at <br>
3200 RPM.? It's possible it's worse at 3200 now than it was
before <br>
because the full advance timing is now less.<<</span></div>
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