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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modern Fuel & Ignition Advance
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<blockquote data-quote="Oldhaven" data-source="post: 94945" data-attributes="member: 2879"><p>I am also above my comfort level here, so I hope to learn something I can understand from those who grok this better than me, but looking at what very high revving engines are doing with advance, I think that sounds right.</p><p></p><p>[ATTACH]21993[/ATTACH]</p><p></p><p> With our low RPM engines we seem to only be using the first half of what is possible with an ignition advance curve that runs into the high teens. If davidd was running up to 7000 it looks like starting going down in advance compared to a leisurely 4000-5000 RPM's plateau might be the right direction to be going. (Though whether it means more or less power, detonation risk...?????) Not an easy task for bob weights. For most of us the three curves above or something like that seem to work pretty well.</p></blockquote><p></p>
[QUOTE="Oldhaven, post: 94945, member: 2879"] I am also above my comfort level here, so I hope to learn something I can understand from those who grok this better than me, but looking at what very high revving engines are doing with advance, I think that sounds right. [ATTACH]21993[/ATTACH] With our low RPM engines we seem to only be using the first half of what is possible with an ignition advance curve that runs into the high teens. If davidd was running up to 7000 it looks like starting going down in advance compared to a leisurely 4000-5000 RPM's plateau might be the right direction to be going. (Though whether it means more or less power, detonation risk...?????) Not an easy task for bob weights. For most of us the three curves above or something like that seem to work pretty well. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modern Fuel & Ignition Advance
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