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General Chat (Vincent Related)
Mallows & Archer Racer
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<blockquote data-quote="davidd" data-source="post: 84866" data-attributes="member: 1177"><p>Greg,</p><p></p><p>The oil line from the top of the timing chest feeds the rocker arm bearings, which are in the center of the rocker covers. The rocker covers come off exposing the rockers, which look like standard motorcycle rockers. Thus, the rockers have the usual screw adjustment on the push rod end.</p><p></p><p>Short of supercharging, this is about the only way to cram more mixture into the combustion chamber. I was talking with Stuart Hooper at Bonneville once when he mentioned he might go to .75" lift on the Velocette. I thought how lucky he was to have that option when I could barely get .5" with the Vincent. The Vincent design worked remarkably well at providing higher performance from standard components at the time. Today, it is easier now to get springs that won't float and push rods that don't bend forcing the Vincent hot rodders to do all sorts of elaborate mods to achieve maximum performance. It is nice to see that someone went to the trouble to test out the concept.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 84866, member: 1177"] Greg, The oil line from the top of the timing chest feeds the rocker arm bearings, which are in the center of the rocker covers. The rocker covers come off exposing the rockers, which look like standard motorcycle rockers. Thus, the rockers have the usual screw adjustment on the push rod end. Short of supercharging, this is about the only way to cram more mixture into the combustion chamber. I was talking with Stuart Hooper at Bonneville once when he mentioned he might go to .75" lift on the Velocette. I thought how lucky he was to have that option when I could barely get .5" with the Vincent. The Vincent design worked remarkably well at providing higher performance from standard components at the time. Today, it is easier now to get springs that won't float and push rods that don't bend forcing the Vincent hot rodders to do all sorts of elaborate mods to achieve maximum performance. It is nice to see that someone went to the trouble to test out the concept. David [/QUOTE]
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