Differences
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Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
techtalk:ref:oil06 [2019/05/25 14:27] hippysmack [Oil Pump Covers] |
techtalk:ref:oil06 [2022/06/23 21:44] hippysmack [Return to Feed Ratios] |
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[[techtalk:ih:oil03#oil_pump|77-85 Oil Pump]] in the IH section of the Sportsterpedia. \\ | [[techtalk:ih:oil03#oil_pump|77-85 Oil Pump]] in the IH section of the Sportsterpedia. \\ | ||
[[techtalk:evo:oil03|86-Present Oil Pump]] in the Evo section of the Sportsterpedia. \\ | [[techtalk:evo:oil03|86-Present Oil Pump]] in the Evo section of the Sportsterpedia. \\ | ||
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+ | ====== Return to Feed Ratios ====== | ||
+ | 77-85 feed gerotors have the smallest volume and smallest of the gerotor pumps used on Sportsters. \\ | ||
+ | 86-06 feed gerotors have the same volume. \\ | ||
+ | 77-97 return gerotors have the same volume. \\ | ||
+ | 98-06 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). \\ | ||
+ | 06-present are the tallest and also have a different teeth profile. \\ | ||
+ | |||
+ | * **77-85 return to feed ratio app 2.78:1** | ||
+ | * Return Height: .500", Feed Height: .180" | ||
+ | * **86-90 return to feed ratio app 1.89:1** | ||
+ | * Return Height: .500", Feed Height: .265" | ||
+ | * **91-97 return to feed ratio app 1.89:1** | ||
+ | * Return Height: .500", Feed Height: .265" | ||
+ | * **98-06 return to feed ratio app 2.64:1** | ||
+ | * Return Height: .700", Feed Height: .265" | ||
+ | * **07-up return to feed ratio app 4.25:1** | ||
+ | * Return Height: .850", Feed Height: .200" | ||
+ | |||
+ | ====== Return hole in the "duck bill" ====== | ||
+ | |||
+ | {{: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 ======= | ||
With a 98 style gasket on the 79 pump, the gasket fits nice and snug as it should be. \\ | With a 98 style gasket on the 79 pump, the gasket fits nice and snug as it should be. \\ |