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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Vincent pilgrim pump in comparison
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<blockquote data-quote="ClassicBiker" data-source="post: 111292" data-attributes="member: 1632"><p>I don't see how. It is merely a dribble hole, it isn't under any pressure what so ever. It merely allows oil to splash on to the scroll and pinion of the oil pump. The oil being sent to the valve gear is impulse and not a constant pressure. This is evident when looking at the return in the tank, it spurts out intermittently rather than a steady stream as if constant pressure. Most dry sump systems are designed with the return from the sump having a volume greater than the feed side, that way oil does not collect in the sump. Any oil that splashes up there will drain back to the sump as it passes roller bearings either side of the scroll. I very much doubt a larger hole here will have a detrimental effect to the feed to the valve gear. I would caution about going too large as it is in the radius of the bearing housing area and very near the inner main bearing race.</p><p>Steven</p><p></p><p>[ATTACH=full]29236[/ATTACH]</p></blockquote><p></p>
[QUOTE="ClassicBiker, post: 111292, member: 1632"] I don't see how. It is merely a dribble hole, it isn't under any pressure what so ever. It merely allows oil to splash on to the scroll and pinion of the oil pump. The oil being sent to the valve gear is impulse and not a constant pressure. This is evident when looking at the return in the tank, it spurts out intermittently rather than a steady stream as if constant pressure. Most dry sump systems are designed with the return from the sump having a volume greater than the feed side, that way oil does not collect in the sump. Any oil that splashes up there will drain back to the sump as it passes roller bearings either side of the scroll. I very much doubt a larger hole here will have a detrimental effect to the feed to the valve gear. I would caution about going too large as it is in the radius of the bearing housing area and very near the inner main bearing race. Steven [ATTACH type="full"]29236[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Vincent pilgrim pump in comparison
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