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playground:playground [2024/04/10 21:34] hippysmack [Testing Materials] |
playground:playground [2024/04/10 23:06] hippysmack [Appendix] |
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| ====== Testing Materials ====== | ====== Testing Materials ====== | ||
| - | All testing was performed at room temperature. However, at room temperature oil has relatively high viscosity so may not necessarily represent hot oil being pumped in an actual engine. To address this concern and simulate actual pumping of motor oil at operating temperature, a blend of WD-40 and 5W-20 motor was made. More specifically, Fleet Farm 5W-20 semi-synthetic oil containing ~ 30 wt% WD-40 was employed to provide a fluid having a room temperature viscosity of ~ 20 cP, which is the same viscosity as straight 50 weight motor oil at 100°C. The plot below shows a dilution curve of the subject fluids mixed in various proportions. ((chart provided by Kurt Melancon)) \\ | + | All testing was performed at room temperature. However, at room temperature oil has relatively high viscosity so may not necessarily represent hot oil being pumped in an actual engine. To address this concern and simulate actual pumping of motor oil at operating temperature, a blend of WD-40 and 5W-20 motor was made. More specifically, Fleet Farm 5W-20 semi-synthetic oil containing ~ 30 wt% WD-40 was employed to provide a fluid having a room temperature viscosity of ~ 20 cP, which is the same viscosity as straight 50 weight motor oil at 100°C. The plot below shows a dilution curve of the subject fluids mixed in various proportions. \\ |
| - | {{techtalk:ref:oil:1972_oil_pump_testing_-_oil_dilution_by_kurt_c_melancon.png?direct&600|}} \\ | + | {{techtalk:ref:oil:1972_oil_pump_testing_-_oil_dilution_by_kurt_c_melancon.png?direct&600|}} ((chart provided by Kurt Melancon)) \\ |
| The subject test fluid was used almost exclusively, but a few runs were conducted with conventional oil - straight Mystik JT8 15W-50 motor oil at room temperature - to compare results with those from the low viscosity 20 cP blend.\\ | The subject test fluid was used almost exclusively, but a few runs were conducted with conventional oil - straight Mystik JT8 15W-50 motor oil at room temperature - to compare results with those from the low viscosity 20 cP blend.\\ | ||
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| It is well known that gear pump output, under controlled conditions, correlates linearly with pump speed, so pump output can be extrapolated to higher operation speeds with good confidence. \\ | It is well known that gear pump output, under controlled conditions, correlates linearly with pump speed, so pump output can be extrapolated to higher operation speeds with good confidence. \\ | ||
| - | The data table and plot below show select results from pump tests. The -72 gear pump tested here had impressive output, since the pump volume at 2500 rpm was greater than 1.3 qt/min. Thus, there is certainly a generous amount of oil going through any KH/XL engine which would have similar, if not identical, feed gears. To add a bit of historical context here, the subsequent XL gerotor pumps employed from 1977 forward, pump ~ 50% higher volume than the -72 gear pump (see HippySmack's data table in Appendix for comparison). | + | The data table and plot below show select results from pump tests. The -72 gear pump tested here had impressive output, since the pump volume at 2500 rpm was greater than 1.3 qt/min. Thus, there is certainly a generous amount of oil going through any KH/XL engine which would have similar, if not identical, feed gears. To add a bit of historical context here, the subsequent XL gerotor pumps employed from 1977-1985 pump slightly less and 1986-up versions pump ~ 50% higher volumes than the -72 gear pump (see HippySmack's data table in Appendix for comparison). |
| {{:techtalk:ref:oil:1972_oil_pump_testing_-_flow_rates_by_kurt_c_melancon.png?direct&800|}} ((chart provided by Kurt Melancon)) \\ | {{:techtalk:ref:oil:1972_oil_pump_testing_-_flow_rates_by_kurt_c_melancon.png?direct&800|}} ((chart provided by Kurt Melancon)) \\ | ||
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| Below is a chart from testing done by Hippysmack showing the volume of oil delivered by the various gerotor pumps (1977-up). \\ | Below is a chart from testing done by Hippysmack showing the volume of oil delivered by the various gerotor pumps (1977-up). \\ | ||
| Real world testing results were just a tad lower than the charted measurements. The initial results were quantified in gallons/minute. \\ | Real world testing results were just a tad lower than the charted measurements. The initial results were quantified in gallons/minute. \\ | ||
| - | The chart was converted to quarts/minute. ((chart provided by Kurt Melancon)) \\ | + | The chart below was converted to quarts/minute. ((chart provided by Kurt Melancon)) \\ |
| {{:techtalk:ref:oil:1972_oil_pump_testing_-_1977-up_comparisons_by_kurt_c_melancon.png?direct&800|}} \\ | {{:techtalk:ref:oil:1972_oil_pump_testing_-_1977-up_comparisons_by_kurt_c_melancon.png?direct&800|}} \\ | ||
