Differences

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--- techtalk:ref:oil05f [2019/08/15 02:37]
hippysmack [07 Up Oil Pump Mod For Use in 86-90 Engines]
+++ techtalk:ref:oil05f [2022/05/15 21:10]
hippysmack [Sportster oil pumps]
@@ Line 1: / Line 1: @@
 [[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
 ====== REF: Oiling & Lubrication - Sub-05F ======
-====== 07 Up Oil Pump Mod For Use in 86-90 Engines ======
+====== Modding a 98-up style Oil Pump For Use in 86-90 Engines ======
 Related articles in the Evo section of the Sportsterpedia: \\
 ........ * [[techtalk:evo:oil01|Engine Oil System]] \\
@@ Line 12: / Line 12: @@
 |  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|}}|
+Contact: \\
+[[http://www.karlingracing.com/index.html|Karling Racing.com]] \\
+Telephone +46(8)51400488 \\
+E-mail: sale@karlingracing.com \\
 ====== Applications for this mod ======
@@ Line 84: / Line 89: @@
 |{{: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 ======

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