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techtalk:ref:engmech04 [2020/02/11 03:31] hippysmack [Sub Documents] |
techtalk:ref:engmech04 [2020/07/28 22:35] hippysmack [Vacuum Pump for Reducing Crankcase Pressure] |
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| ===== Aftermarket Breathers / PCV Valves ===== | ===== Aftermarket Breathers / PCV Valves ===== | ||
| ==== Sub Documents ==== | ==== Sub Documents ==== | ||
| - | * [[techtalk:ref:engmech04a|Dissecting the Hayden KVP38 Crankcase Breather Valve]] | + | * [[techtalk:ref:engmech04a|Dissecting the Hayden KVP38 Crankcase Breather Valve]] |
| + | * [[techtalk:ref:engmech04b|Frequently Asked Questions About the Hayden Krankvent]] | ||
| There is a product called a Krankvent that can be plumbed into the lower, 6 o’clock position as an alternative to a stock foo-foo valve. ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=518948&highlight=cam+chest+breather)) \\ | There is a product called a Krankvent that can be plumbed into the lower, 6 o’clock position as an alternative to a stock foo-foo valve. ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=518948&highlight=cam+chest+breather)) \\ | ||
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| * Makes a clicking noise during operation. | * Makes a clicking noise during operation. | ||
| - | | Here is a 2-stroke reed valve. ((photo by norseXL of the XLFORUM)) | | + | | Here is a 2-stroke reed valve. ((photo by norseXL of the XLFORUM http://xlforum.net/forums/showthread.php?t=1386341&highlight=reed)) | |
| |{{:techtalk:ref:engmech:reed_valve_by_norsexl.jpg?direct&300|}}| | |{{:techtalk:ref:engmech:reed_valve_by_norsexl.jpg?direct&300|}}| | ||
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| * Now add a vacuum pump with Z (-1) amount of pull. \\ Now you get X+1=Y-Z... seems the balance (to zero) is restored even though positive pressure is compiled of blowby. \\ But the lower the negative pressure is at the beginning of the downstroke, the lower the next positive pressure will be. | * Now add a vacuum pump with Z (-1) amount of pull. \\ Now you get X+1=Y-Z... seems the balance (to zero) is restored even though positive pressure is compiled of blowby. \\ But the lower the negative pressure is at the beginning of the downstroke, the lower the next positive pressure will be. | ||
| * If you are generating 2 psi of positive pressure on downstroke but reduce it's beginning surge to -1 psi (Z), \\ the result will be only 1 psi of positive pressure during downstroke. \\ -1 (+) + 2 equals +1. | * If you are generating 2 psi of positive pressure on downstroke but reduce it's beginning surge to -1 psi (Z), \\ the result will be only 1 psi of positive pressure during downstroke. \\ -1 (+) + 2 equals +1. | ||
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| + | Another example: | ||
| + | {{:techtalk:ref:engmech:crankcase_pressure_cycle_by_hippysmack.png?direct&400|}} ((drawing by Hippysmack)) \\ | ||
