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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
How critical are the rear cylinder oil feeds!
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<blockquote data-quote="greg brillus" data-source="post: 102901" data-attributes="member: 597"><p>Hi there Ron, Not so much that it is an option to either use or not use the Jet or its holder, more so for a racing engine. The jet or "Restrictor assembly" is there obviously to keep some oil flow/pressure to the crankshaft. It is well known that a roller bearing crank does not need much lubrication to work well, and high pressure to a roller crank will cause it to fail as the pressure will "Lock up" the rollers causing them to skid across the tracks. Given most race Vincent engines run a two start pump, the oil delivery is better, so you can afford to open up the passage to supply the cams a bit more. A lot of racers run the standard pump and this too can work fine, it all comes down to what works for any individual engine. From my limited experience with racing Vincent engines, it is the cams/followers that are the weak link, but I strongly believe it is the choice of components and how well they have been made/hardened that affects this.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 102901, member: 597"] Hi there Ron, Not so much that it is an option to either use or not use the Jet or its holder, more so for a racing engine. The jet or "Restrictor assembly" is there obviously to keep some oil flow/pressure to the crankshaft. It is well known that a roller bearing crank does not need much lubrication to work well, and high pressure to a roller crank will cause it to fail as the pressure will "Lock up" the rollers causing them to skid across the tracks. Given most race Vincent engines run a two start pump, the oil delivery is better, so you can afford to open up the passage to supply the cams a bit more. A lot of racers run the standard pump and this too can work fine, it all comes down to what works for any individual engine. From my limited experience with racing Vincent engines, it is the cams/followers that are the weak link, but I strongly believe it is the choice of components and how well they have been made/hardened that affects this. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
How critical are the rear cylinder oil feeds!
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