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techtalk:ref:oil06 [2021/06/30 07:30] hippysmack [Return to Feed Ratios] |
techtalk:ref:oil06 [2024/01/19 01:18] (current) hippysmack |
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| ====== Return to Feed Ratios ====== | ====== Return to Feed Ratios ====== | ||
| - | 77-85 feed gerotors have the smallest volume and smallest of the gerotor pumps used on Sportsters. \\ | + | 1977-1985 feed gerotors have the smallest volume and smallest of the gerotor pumps used on Sportsters. \\ |
| - | 86-06 feed gerotors have the same volume. \\ | + | 1986-2006 feed gerotors have the same volume. \\ |
| - | 77-97 return gerotors have the same volume. \\ | + | 1977-1997 return gerotors have the same volume. \\ |
| - | 98-06 return gerotors have the same volume. \\ | + | 1998-2006 return gerotors have the same volume. \\ |
| - | 77-06 gerotors all have the same teeth profile (bodies changed OD but volume per height stayed the same). \\ | + | 1977-2006 gerotors all have the same teeth profile (bodies changed OD but volume per height stayed the same). \\ |
| - | 06-present are the tallest and also have a different teeth profile. \\ | + | 2007-present are the tallest and also have a different teeth profile. \\ |
| * **77-85 return to feed ratio app 2.78:1** | * **77-85 return to feed ratio app 2.78:1** | ||
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| * Return Height: .850", Feed Height: .200" | * Return Height: .850", Feed Height: .200" | ||
| + | ====== Return hole in the "duck bill" ====== | ||
| + | The size of the crankcase oil inlet hole inside the duck bill changed a couple times. \\ | ||
| + | 1977-1990 return inlet hole ID = 0.250" \\ | ||
| + | 1991-1997 return inlet hole ID = 0.280" \\ | ||
| + | 1998-Present return inlet hole ID = 0.350" \\ | ||
| + | |||
| + | {{:techtalk:ref:oil:1977-present_sportster_oil_pump_return_inlet_id_by_hippysmack.jpg?direct&400|}} \\ | ||
| ====== Comparing 77-85, 98-06 and 07 and up Pumps ======= | ====== Comparing 77-85, 98-06 and 07 and up Pumps ======= | ||
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| |{{:techtalk:ref:oil:77_and_98_oil_pump_comparison.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_1_by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:ref:oil:77_and_98_oil_pump_comparison.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_1_by_hippysmack.jpg?direct&300|}}| | ||
| - | The 79, 98 and 07 pumps were bolted to and outlined on the aluminum sheet. ((photos by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2071153&page=6)) \\ | + | The 79, 98 and 07 pumps were bolted to and outlined on the aluminum sheet. ((photos by Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/194881-let-s-study-the-77-85-oil-pump-parts-and-changes-and-when/page6?t=2071153&page=6)) \\ |
| |{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77-98-07_oil_pump_comparison_1._by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77_and_98_oil_pump_comparison_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:77-98-07_oil_pump_comparison_1._by_hippysmack.jpg?direct&300|}}| | ||
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| - | | L83 pump body and 86-90 cover. ((photo by jlv of the XLFORUM http://xlforum.net/forums/showthread.php?p=5749850#post5749850)) | 77-85 covers w/ feed hole in arm. ((photo by Hippysmack)) | 86-90 covers without the feed hole in the arm. ((photo by Hippysmack)) | | + | | L83 pump body and 86-90 cover. ((photo by jlv of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/196850-oil-pump-iron-1000-1979-bizarre#post4301658)) | 77-85 covers w/ feed hole in arm. ((photo by Hippysmack)) | 86-90 covers without the feed hole in the arm. ((photo by Hippysmack)) | |
| |{{:techtalk:ref:oil:77-85_oil_pump_with_86-90_cover_by_jlv.jpg?direct&300|}}|{{:techtalk:ih:oil:77-85_oil_pump_cover_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:86-90_oil_pump_cover_3_by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:ref:oil:77-85_oil_pump_with_86-90_cover_by_jlv.jpg?direct&300|}}|{{:techtalk:ih:oil:77-85_oil_pump_cover_3_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:86-90_oil_pump_cover_3_by_hippysmack.jpg?direct&300|}}| | ||
