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techtalk:ref:engmech04g [2019/11/08 02:38] hippysmack [REF: Engine Mechanicals - Sub-04G] |
techtalk:ref:engmech04g [2019/11/14 06:32] hippysmack [Slack tube testing on a 1998 1250S model] |
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| An addition of 3" of positive pressure exerted (6" in actual height) on downstroke still yields a balance of 6" of total vacuum from the engine (showing 3” on left leg). \\ | An addition of 3" of positive pressure exerted (6" in actual height) on downstroke still yields a balance of 6" of total vacuum from the engine (showing 3” on left leg). \\ | ||
| In this example, the total pressure in the crankcase is still negative but with not as much pressure as it was at the last upstroke. \\ | In this example, the total pressure in the crankcase is still negative but with not as much pressure as it was at the last upstroke. \\ | ||
| - | {{:techtalk:ref:engmech:slack_tube_figure_d_by_hippysmack.jpg?direct&400|}} \\ | + | {{:techtalk:ref:engmech:1slack_tube_figure_d_by_hippysmack.jpg?direct&400|}} \\ |
| For this testing, a slack tube was made using an 1/8" hose barb fitting plugged into the timing plug hole with a length of 1/8" clear hose to the instrument. \\ | For this testing, a slack tube was made using an 1/8" hose barb fitting plugged into the timing plug hole with a length of 1/8" clear hose to the instrument. \\ | ||
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| {{:techtalk:ref:engmech:hst_testing_2_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=82)) {{:techtalk:ref:engmech:hst_testing_2_at_1000_rpm_no_oil_cap_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=84)) \\ | {{:techtalk:ref:engmech:hst_testing_2_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=82)) {{:techtalk:ref:engmech:hst_testing_2_at_1000_rpm_no_oil_cap_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=84)) \\ | ||
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| + | ===== Test with air cleaner removed ===== | ||
| + | The A/C was removed to se if it had any impact on crankcase pressure testing. \\ | ||
| + | There was no noticeable difference with it off through the RPM range tested up to 5000. \\ | ||
| + | There was also no noticeable oil mist during this period. \\ | ||
| + | Condensation and light oil mist accumulation at the bolts was from original testing before replacing the umbrellas. \\ | ||
| + | But none of this is was in the filter and no oil puking. \\ | ||
| + | |||
| + | {{:techtalk:ref:engmech:hst_testing_2_at_1000_rpm_no_ac_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=82)) | ||
| + | {{:techtalk:ref:engmech:hst_testing_2_ac_removed_at_1000_rpm_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=82)) \\ | ||
| \\ | \\ | ||
