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techtalk:ref:oil05f [2019/08/17 16:02] hippysmack [Modding a 98 up style Oil Pump For Use in 86-90 Engines] |
techtalk:ref:oil05f [2022/05/15 21:10] hippysmack [Sportster oil pumps] |
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| Karling Racing's oil pump mod for 07-up oil pumps. ((photo by Jorgen of the XLFORUM http://xlforum.net/forums/showthread.php?t=1619616&page=42)) | Another Karling modded oil pump ((photo by Rubine of the XLFORUM http://xlforum.net/forums/showthread.php?t=1861960&page=10)) | | | Karling Racing's oil pump mod for 07-up oil pumps. ((photo by Jorgen of the XLFORUM http://xlforum.net/forums/showthread.php?t=1619616&page=42)) | Another Karling modded oil pump ((photo by Rubine of the XLFORUM http://xlforum.net/forums/showthread.php?t=1861960&page=10)) | | ||
|{{:techtalk:ref:oil:karling_racing_07_oil_pump_mod_by_jorgen.jpg?direct&300|}}| {{techtalk:ref:oil:karling_modded_07_oil_pump_by_rubine.jpg?direct&300|}}| | |{{:techtalk:ref:oil:karling_racing_07_oil_pump_mod_by_jorgen.jpg?direct&300|}}| {{techtalk:ref:oil:karling_modded_07_oil_pump_by_rubine.jpg?direct&300|}}| | ||
+ | |||
+ | Contact: \\ | ||
+ | [[http://www.karlingracing.com/index.html|Karling Racing.com]] \\ | ||
+ | Telephone +46(8)51400488 \\ | ||
+ | E-mail: sale@karlingracing.com \\ | ||
====== Applications for this mod ====== | ====== Applications for this mod ====== | ||
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|{{:techtalk:evo:oil:86-90_oil_pump_oiling_paths_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:91-97_oil_pump_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:98-up_oil_pump_oiling_paths_by_bsaman.jpg?direct&300|}}| | |{{:techtalk:evo:oil:86-90_oil_pump_oiling_paths_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:91-97_oil_pump_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:98-up_oil_pump_oiling_paths_by_bsaman.jpg?direct&300|}}| | ||
+ | ==== Reason this mod came to be ==== | ||
+ | During the 124" build, a 2007-up Sportster oil pump was installed. \\ | ||
+ | Upon dyno testing, it was revealed that there was a reduction in max power and torque pointing wetsumping at high RPM. \\ | ||
+ | Tests were also done running the bike at different rpms, then stopping the engine to drain and measure the volume of oil in the sump. \\ | ||
+ | These test also pointed to at wetsumping. \\ | ||
+ | Then, suspected culprit was the oil pump. The modern (1998-up) H-D oil pumps have a suction port in the cam chest. \\ | ||
+ | But unlike modern H-D cases, the S&S cases drain the cam chest to the crankcase sump. \\ | ||
+ | And that drain hole is situated at a lower point in the cam chest than the cam chest suction port to the oil pump. \\ | ||
+ | Then it was thought that the camchest suction port in the oil pump only delivers air into the oil return gerotor in this application. \\ | ||
+ | (thereby lowering the possible return flowrate from the sump) \\ | ||
+ | So the idea came about to close off the front drain port in the 2007 oil pump. \\ | ||
+ | |||
====== Considerations ====== | ====== Considerations ====== | ||