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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil Pump and Oiling Sytem Modifications
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<blockquote data-quote="Tnecniv Edipar" data-source="post: 165568" data-attributes="member: 418"><p>Well roller bearings don't require pressure but high flow is a good thing, and this is where the pilgrim type pump falls down. High flow is also good for cooling. Also, the British vertical twins from Triumph, BSA and Norton had plain bearing cranks, with recip pumps!! I think AMC had 2 gear pumps, one for feed, one for scavenge, as they were a bit up market, although percieved as dull by the boy racer types! Velocette of course used gear pumps, even with roller and ball bearing bottom ends, but spoilt it a bit by making the attachment an interference fit, not great for overhaul or maintenance! Why not just bolt it on with an O ring seal?!</p></blockquote><p></p>
[QUOTE="Tnecniv Edipar, post: 165568, member: 418"] Well roller bearings don't require pressure but high flow is a good thing, and this is where the pilgrim type pump falls down. High flow is also good for cooling. Also, the British vertical twins from Triumph, BSA and Norton had plain bearing cranks, with recip pumps!! I think AMC had 2 gear pumps, one for feed, one for scavenge, as they were a bit up market, although percieved as dull by the boy racer types! Velocette of course used gear pumps, even with roller and ball bearing bottom ends, but spoilt it a bit by making the attachment an interference fit, not great for overhaul or maintenance! Why not just bolt it on with an O ring seal?! [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil Pump and Oiling Sytem Modifications
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