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techtalk:ref:engmech04 [2019/12/07 03:35] hippysmack [Vacuum (differential) Pressure] |
techtalk:ref:engmech04 [2019/12/18 00:49] hippysmack [Breather System Air Volume Test by DK Custom] |
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| {{:techtalk:ref:engmech:differential_pressure_drawing_1_by_hippysmack.jpg?direct&450|}} ((drawing by Hippysmack)) | {{:techtalk:ref:engmech:differential_pressure_drawing_1_by_hippysmack.jpg?direct&450|}} ((drawing by Hippysmack)) | ||
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| + | Differential pressure as it applies to the Sportster breathing system: \\ | ||
| {{:techtalk:ref:engmech:negative_pressure_drawing_1_by_hippysmack.jpg?direct&400|}} ((photo by Hippysmack)) {{:techtalk:ref:engmech:positive_pressure_drawing_1_by_hippysmack.jpg?direct&400|}} \\ | {{:techtalk:ref:engmech:negative_pressure_drawing_1_by_hippysmack.jpg?direct&400|}} ((photo by Hippysmack)) {{:techtalk:ref:engmech:positive_pressure_drawing_1_by_hippysmack.jpg?direct&400|}} \\ | ||
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| Applying the same principles, you can see the relation of positive and negative crankcase pressure in the Sportster engine. \\ | Applying the same principles, you can see the relation of positive and negative crankcase pressure in the Sportster engine. \\ | ||
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| Results: \\ | Results: \\ | ||
| - | Sportsters move the least amount of air through the breathers. | + | Sportsters move the least amount of air through the breathers. \\ |
| Twin Cams move the most amount of air through the breathers, with little difference between air cooled and Twin Cooled. \\ | Twin Cams move the most amount of air through the breathers, with little difference between air cooled and Twin Cooled. \\ | ||
| Milwaukee-Eights move more air than Sportsters, but little more than half as much as the Twin Cams through the breathers. \\ | Milwaukee-Eights move more air than Sportsters, but little more than half as much as the Twin Cams through the breathers. \\ | ||
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| ====== Engine Breathing ====== | ====== Engine Breathing ====== | ||
| + | Typical automobile V-8 engine breathing: ((drawing by Hippysmack)) \\ | ||
| + | {{:techtalk:ref:engmech:v-8_engine_breather_system_by_hippysmack.jpg?direct&400|}} \\ | ||
| Engine ventilation is connected to the rockerbox, crankcase, cam gear case and the oil tank. ((bunny32 of the XLFORUM http://xlforum.net/forums/showthread.php?t=67658&page=3)) \\ | Engine ventilation is connected to the rockerbox, crankcase, cam gear case and the oil tank. ((bunny32 of the XLFORUM http://xlforum.net/forums/showthread.php?t=67658&page=3)) \\ | ||
