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Classic Goldwing Technical Forums
General Classic Goldwing Technical Forum
Cam ignition timing 'deflection' (wobble)?
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<blockquote data-quote="C5Performance" data-source="post: 141124" data-attributes="member: 2938"><p>You might be correct, and I haven't measured it, but the cam would need to "twist" for timing to be messed up, and not just flex. </p><p></p><p>I immediately think of a car engine and length...</p><p></p><p><strong>When cylinder #8 fires in a Chevy....it experiences the twist/flex/wobble of the entire crankshaft length. THEN it has chain whip/wobble to the camshaft. THEN it experiences the twist/flex/wobble of the entire length of the camshaft. THEN it has gear lash for the distributor, and finally arrives at the contact points which also have play in the timing advancer. </strong></p><p></p><p>How does it even run?</p><p></p><p>My theory is the inaccuracy of the points is probably far worse than all the flex/slop in the rest of the engine. Plus a Goldwing cam is only a foot long. My Hercules inline 6 cylinder engine that operated my crane was at least 4-5 feet long!</p><p></p><p>The picture shown below uses head mounted distributors but would still be mis-timed to the crank due to gear lash/chain whip?</p><p>How much flex is "too much"? Where are the engine designers when you need one?</p><p></p><p>[ATTACH=full]10724[/ATTACH]</p></blockquote><p></p>
[QUOTE="C5Performance, post: 141124, member: 2938"] You might be correct, and I haven't measured it, but the cam would need to "twist" for timing to be messed up, and not just flex. I immediately think of a car engine and length... [b]When cylinder #8 fires in a Chevy....it experiences the twist/flex/wobble of the entire crankshaft length. THEN it has chain whip/wobble to the camshaft. THEN it experiences the twist/flex/wobble of the entire length of the camshaft. THEN it has gear lash for the distributor, and finally arrives at the contact points which also have play in the timing advancer. [/b] How does it even run? My theory is the inaccuracy of the points is probably far worse than all the flex/slop in the rest of the engine. Plus a Goldwing cam is only a foot long. My Hercules inline 6 cylinder engine that operated my crane was at least 4-5 feet long! The picture shown below uses head mounted distributors but would still be mis-timed to the crank due to gear lash/chain whip? How much flex is "too much"? Where are the engine designers when you need one? [ATTACH type="full" alt="allison-x-4520-rrhtab-front.jpg"]10724._xfImport[/ATTACH] [/QUOTE]
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Classic Goldwing Technical Forums
General Classic Goldwing Technical Forum
Cam ignition timing 'deflection' (wobble)?
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