<div dir="ltr"><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small">Thanks for your input on ignition timing Michael. <br></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small">I have always found the factory specs to be a little confusing.</div><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small">They state 6 degrees BTDC as the timing (which I presume to be "static") and then state that the distributor produces 16 - 18 degrees at 2000 RPM (distributor speed) which I figure to be 32 -36 degrees at 4000 engine RPM.</div><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small">I interpret that to produce 6 + 34 (2 x 17) degrees BTDC at 4000 engine RPM for a total of 40 degrees which sounds like an awful lot.</div><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small">My engine does not sound at all happy with 40 degrees even with 110 octane!!</div><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small">I'm wondering if I have been over thinking this process and the stated advance is meant to be "at idle" with the vacuum connected (not normal practice as far as I was taught) which would add 6 degrees of vacuum advance which would vanish at full throttle producing a net of 34 degrees over 4000 at full throttle.<br></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small">I have been setting the timing to 32 degrees BTDC with the vacuum disconnected at 4000 RPM and the engine runs fey well and very cool, in fact too cool without a 180 degree thermostat.<br></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small">I am running 8.3:1 compressions with an M cam.</div><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small"><br></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small">M<br></div><div class="gmail_default" style="font-family:comic sans ms,sans-serif;font-size:small"> <br></div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Nov 2, 2018 at 9:16 PM Michael Oritt <<a href="mailto:michael.oritt@gmail.com">michael.oritt@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="color:#3333ff">Wayne--</div><div class="gmail_default" style="color:#3333ff"><br></div><div class="gmail_default" style="color:#3333ff">Exactly right--it is total advance that matters and I arrived at that number by gradually increasing advance and seeing the effect upon water temperature at speed and under full load. Anything more and the car would begin to overheat. A bit too much less advance and performance fell off. </div><div class="gmail_default" style="color:#3333ff"><br></div><div class="gmail_default" style="color:#3333ff">BTW I am running a DW "fast street" cam and tubular header and a Mallory non-vacuum advance distributor fired with their Unilite module. I too have a Smitty's five-speed and the Toyota box, 180 XAS's and 3.54 diff set give me about 72-73 mph at 3K rpm's indicated</div><div class="gmail_default" style="color:#3333ff"><br></div><div class="gmail_default" style="color:#3333ff">Best--Michael Oritt</div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Nov 2, 2018 at 6:03 PM Wayne Schultz <<a href="mailto:waschu2@gmail.com" target="_blank">waschu2@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Thanks to Michael and others I am going to stick with 34 - 35 degrees total advance for now. What, I think this means, is that the advance at idle is secondary and not as important as total advance. Cruising with the the Toyota five speed or the original overdrive on the highway is right in the 3K RPM range so I think this the perfect RPM to limit total advance. I might make a run to my local airport and buy some 100LL fuel. I have worked in aviation since 1967 so I have a few friends😃 <div><br></div></div>
_______________________________________________<br>
Support Team.Net <a href="http://www.team.net/donate.html" rel="noreferrer" target="_blank">http://www.team.net/donate.html</a><br>
Suggested annual donation $12.75<br>
<br>
Archive: <a href="http://www.team.net/pipermail/healeys" rel="noreferrer" target="_blank">http://www.team.net/pipermail/healeys</a> <a href="http://autox.team.net/archive" rel="noreferrer" target="_blank">http://autox.team.net/archive</a><br>
<br>
<a href="mailto:Healeys@autox.team.net" target="_blank">Healeys@autox.team.net</a><br>
<a href="http://autox.team.net/mailman/listinfo/healeys" rel="noreferrer" target="_blank">http://autox.team.net/mailman/listinfo/healeys</a><br>
<br>
Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/healeys/michael.oritt@gmail.com" rel="noreferrer" target="_blank">http://autox.team.net/mailman/options/healeys/michael.oritt@gmail.com</a><br>
<br>
</blockquote></div>
_______________________________________________<br>
Support Team.Net <a href="http://www.team.net/donate.html" rel="noreferrer" target="_blank">http://www.team.net/donate.html</a><br>
Suggested annual donation $12.75<br>
<br>
Archive: <a href="http://www.team.net/pipermail/healeys" rel="noreferrer" target="_blank">http://www.team.net/pipermail/healeys</a> <a href="http://autox.team.net/archive" rel="noreferrer" target="_blank">http://autox.team.net/archive</a><br>
<br>
<a href="mailto:Healeys@autox.team.net" target="_blank">Healeys@autox.team.net</a><br>
<a href="http://autox.team.net/mailman/listinfo/healeys" rel="noreferrer" target="_blank">http://autox.team.net/mailman/listinfo/healeys</a><br>
<br>
Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com" rel="noreferrer" target="_blank">http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com</a><br>
<br>
</blockquote></div>