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techtalk:ref:engmech07c [2020/10/18 04:20] hippysmack [Differential Pressure] |
techtalk:ref:engmech07c [2023/12/26 21:18] (current) hippysmack |
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| [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
| ====== REF: Engine Mechanicals - Sub-07C ====== | ====== REF: Engine Mechanicals - Sub-07C ====== | ||
| - | ====== Differential Pressure and Vaccum ====== | + | ====== Differential Pressure ====== |
| - | Vacuum pressure (negative) and air pressure (positive) are the terms that describe the amount of molecules of a gas in a given unit of space. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1204854&page=4)) \\ | + | Vacuum pressure (negative) and air pressure (positive) are the terms that describe the amount of molecules of a gas in a given unit of space. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/122424-breather-diagrams/page4?t=1204854&page=4)) \\ |
| More molecules inside the engine than outside = inside air pressure. \\ | More molecules inside the engine than outside = inside air pressure. \\ | ||
| Less molecules inside the engine than outside = inside is vacuum pressure. \\ | Less molecules inside the engine than outside = inside is vacuum pressure. \\ | ||
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| That restriction is on purpose to lessen the pumping losses by being closer to #1 than to #2. \\ | That restriction is on purpose to lessen the pumping losses by being closer to #1 than to #2. \\ | ||
| - | As the vacuum increases, the pumping losses decrease and the fluid is less dense. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1204854&page=3)) \\ | + | As the vacuum increases, the pumping losses decrease and the fluid is less dense. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/122424-breather-diagrams/page3?t=1204854&page=3)) \\ |
| On the flip side, less dense fluid can't suspend as much liquid (possibly resulting in more liquid drag). | On the flip side, less dense fluid can't suspend as much liquid (possibly resulting in more liquid drag). | ||
