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techtalk:ref:engmech05 [2019/11/14 03:45] hippysmack [Vent Outlet Above vs Below the Head Vents] |
techtalk:ref:engmech05 [2020/03/01 23:27] hippysmack [Filter on End of the Vent Line] |
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The oil would have to run uphill to get from the heads to the rocker boxes and into the lower end. \\ | The oil would have to run uphill to get from the heads to the rocker boxes and into the lower end. \\ | ||
So there is no functional advantage to running the lines higher than the head vents. \\ | So there is no functional advantage to running the lines higher than the head vents. \\ | ||
- | {{:techtalk:evo:engmech:a91-03_sportster_head_breathing_2_drawing_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:evo:engmech:a04_up_head_breathing_drawing_2_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack)) | + | {{:techtalk:evo:engmech:91-03_sportster_head_breathing_2_drawing_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:evo:engmech:04_up_head_breathing_drawing_2_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack)) |
The air coming from the head vents has fine water condensation and oil mist particles in suspension with it. \\ | The air coming from the head vents has fine water condensation and oil mist particles in suspension with it. \\ | ||
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The filter adds resistance to the vent pressure coming out of the engine. \\ | The filter adds resistance to the vent pressure coming out of the engine. \\ | ||
This resistance can add to goop in the line / filter later. \\ | This resistance can add to goop in the line / filter later. \\ | ||
+ | It can also increase the vacuum inside the engine, which on a street bike, translates to weeping gaskets. \\ | ||
The filter does not keep debris from coming back into the engine. ((Folkie of the XLFORUM http://xlforum.net/forums/showthread.php?p=2087347)) \\ | The filter does not keep debris from coming back into the engine. ((Folkie of the XLFORUM http://xlforum.net/forums/showthread.php?p=2087347)) \\ |