Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision | |||
|
techtalk:ref:oil10a [2020/10/04 18:01] hippysmack |
techtalk:ref:oil10a [2024/01/19 03:16] (current) hippysmack |
||
|---|---|---|---|
| Line 3: | Line 3: | ||
| \\ | \\ | ||
| ====== Oil Pump's Role vs Wetsumping ====== | ====== Oil Pump's Role vs Wetsumping ====== | ||
| - | Scavenge oil flow to the pump is accomplished by the scavenging effect of the pump and by the pressure created by the downward stroke of the piston. ((Deimus of the XLFORUM http://xlforum.net/forums/showthread.php?p=841107#post841107)) \\ | + | Scavenge oil flow to the pump is accomplished by the scavenging effect of the pump and by the pressure created by the downward stroke of the piston. ((Deimus of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/37099-what-causes-wet-sumping/page3#post784300)) \\ |
| Scavenge pumps need some means of getting the oil to the pumps. ((Gord of hpacademy.com https://www.hpacademy.com/forum/off-topic-discussion/show/sealed-vacuumed-dry-sump-systems)) \\ | Scavenge pumps need some means of getting the oil to the pumps. ((Gord of hpacademy.com https://www.hpacademy.com/forum/off-topic-discussion/show/sealed-vacuumed-dry-sump-systems)) \\ | ||
| Line 21: | Line 21: | ||
| The downward stroke helps but it is the suction from the scavenge section that does the most work. \\ | The downward stroke helps but it is the suction from the scavenge section that does the most work. \\ | ||
| - | You would have suction from the scavenge pump if the oil was up to the level of the scavenge pump inlet (in the sump). ((dieselvette of the XLFORUM http://xlforum.net/forums/showthread.php?p=841107#post841107)) \\ | + | You would have suction from the scavenge pump if the oil was up to the level of the scavenge pump inlet (in the sump). ((dieselvette of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/37099-what-causes-wet-sumping/page3#post784300)) \\ |
| But unfortunately there's sometimes air in there, foamy oil, etc. and the pump is working against a vacuum (condition) in the crankcase. \\ | But unfortunately there's sometimes air in there, foamy oil, etc. and the pump is working against a vacuum (condition) in the crankcase. \\ | ||
| And the pump just can't move the oil out fast enough. \\ | And the pump just can't move the oil out fast enough. \\ | ||
| Line 33: | Line 33: | ||
| You could say the pump cavitates momentarily and is working against a vacuum so it has a hard time recovering. \\ | You could say the pump cavitates momentarily and is working against a vacuum so it has a hard time recovering. \\ | ||
| - | | Scavenge inlet on 91-03 engines. ((photo by WestJC7745 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1971672)) | 04 Up scavenge inlet is lower to the bottom. ((photo by meherdad_it of the XLFORUM http://xlforum.net/forums/showthread.php?threadid=944843)) | | + | | Scavenge inlet on 91-03 engines. ((photo by WestJC7745 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/183128-1995-xlh1200?t=1971672)) | 04 Up scavenge inlet is lower to the bottom. ((photo by meherdad_it of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/105751-installing-the-90-nrhs?threadid=944843)) | |
| |{{:techtalk:evo:oil:95_right_case_half_by_westjc7745.jpg?direct&300|}}|{{:techtalk:evo:oil:inside_right_case_by_meherdad_it.jpg?direct&300|}}| | |{{:techtalk:evo:oil:95_right_case_half_by_westjc7745.jpg?direct&300|}}|{{:techtalk:evo:oil:inside_right_case_by_meherdad_it.jpg?direct&300|}}| | ||
| - | |||
| - | |||
