Differences

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--- techtalk:ref:oil05f [2019/05/25 04:00]
hippysmack [Conclusions from testing]
+++ techtalk:ref:oil05f [2022/05/15 21:31]
hippysmack [Testing]
@@ 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 10: / Line 10: @@
 Karling Racing in Sweden designed this mod after flow testing a 2007-up Sportster oil pump for use in an 86-90 engine. ((Jorgen of the XLFORUM http://xlforum.net/forums/showthread.php?t=1619616&page=42)) ((https://www.karlingracing.com/sv)) \\
-|  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))  |
+|  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_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. \\
+==== Testing ====
+-1997 engines drain the gearcase into the crankcase sump area to be scavenged by the sump drain to the oil pump. \\
+-up engines drain the gearcase straight into the oil pump. \\
+However, the 07 pump is preferred as it has bigger scavenge gerotors that carry more oil out of the engine than it's predecessor. \\
+So testing was done on the 2007 pump to determine flow rate. \\
+The pump was tested before and after the modification in Karlings oil pump test rig. \\
+During the flow test, they used a reference volume filled from the scavenge outlet. \\
+The pump was driven at a controlled shaft speed and partially immersed in a low viscosity fluid to resemble the viscosity of hot engine oil. \\
+When the cam chest suction port was allowed to suck air, (sump suction port immersed in liquid), the pump needed 22 seconds to fill the reference volume. \\
+With this mod, (also the internal gerotor kidney was machined to optimize sump port scavenge capacity), pump only needed 13.5 seconds to fill the reference volume. \\
+The testing determined that the 2007 oil pump gained 63% scavenge capacity when the oil pumps cam chest scavenge port was modified (blocked off). \\
+Then the plausible consequence (without modding) was that the engine wetsumps the crankcase to a level that is sufficient to flood the lower part of the cam chest. \\
+Not until then will the full oil pump scavenge capacity be used. \\
 ====== Considerations ======
@@ Line 117: / Line 150: @@
 |{{:techtalk:evo:oil:2007_and_up_oil_pump_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:2007_and_up_oil_pump_5a_by_hippysmack.jpg?direct&300|}}|
-====== Testing ======
-The reason for testing was due to the 07-up pump having a drain port (on top of the pump body) to drain the gearcase. \\
--97 engines drain the gearcase into the crankcase sump area to be scavenged by the sump drain to the oil pump. \\
--up engines drain the gearcase straight into the oil pump. \\
-However, the 07 pump is preferred as it has bigger scavenge gerotors that carry more oil out of the engine than it's predecessor. \\
-The pump was tested before and after the modification in Karlings oil pump test rig. \\
-During the flow test they used a reference volume filled from the scavenge outlet. \\
-The pump was driven at a controlled shaft speed and partially immersed in a low viscosity fluid to resemble the viscosity of hot engine oil. \\
 ====== Results ======
@@ Line 149: / Line 171: @@
 The pressure regulator in the 86-91 engine will dump excess oil into the gearcase as it was designed to do. \\
 Some of this will also splash get splash into the cam chest drain port. \\
-The regulator is notorious for leaking oil into the gearcase as well when not activated. \\
+The regulator is notorious for leaking oil into the gearcase as well (when not activated by designed means). \\
 So the results, even though interesting, will vary constantly inside a running 86-90 engine. \\

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