Differences

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--- techtalk:evo:oil03c [2018/11/26 04:32]
hippysmack [Fittings and routing]
+++ techtalk:evo:oil03c [2019/08/17 15:45]
hippysmack [Cam chest drain in 77-97 engines]
@@ Line 2: / Line 2: @@
 ====== EVO: Oiling & Lubrication - Sub-03C ======
 ====== 5 Speed Oil Pump on 4 Speed Models (Conversion for 86-90 Evo engines) ======
-Any 91 and up oil pump will bolt to a 86-90 case and is considered an upgrade. \\
+Any 91 and up oil pump will bolt to a 77-90 case and is considered an upgrade. \\
 However, the 07 and up pump has the largest scavenger gerotors to move the most oil back into the oil tank. \\
@@ Line 12: / Line 12: @@
 |  86-90 oil pump as installed ((photo by Gary E of the XLFORUM http://xlforum.net/forums/showthread.php?t=2071753))  |  Same engine with 91 and up pump installed ((photo by Gary E of the XLFORUM http://xlforum.net/forums/showthread.php?t=2071753))  |
-===== The stock 86-90 XL oil pump will flood the sump with oil and kill the power at high rpms. =====
+===== The stock 86-90 XL oil pump can flood the sump with oil and kill the power at high rpms. =====
+((Turbo Sporty 48 http://xlforum.net/forums/showthread.php?t=1589124&page=4)) \\
- ((Turbo Sporty 48 http://xlforum.net/forums/showthread.php?t=1589124&page=4))
-  * The stock pump has 4 connection points: ((jtracing919 http://xlforum.net/forums/showthread.php?t=803496))
-    * Feed (from the oil tank)
-    * Return (to the oil tank)
-    * Out ( to the oil filter)
-    * In (from the oil filter)
 The oil pump acts as a pass through for the filter return line. ((aswracing http://xlforum.net/forums/showthread.php?t=803496))
 Since XL motors just flood the motor with oil, the issue is on the scavenging side (trying to get the oil back out of the motor). \\
-Hence the trend toward bigger scavenging sections and smaller pressure sections. \
+Hence the trend toward bigger scavenging sections and smaller pressure sections. \\
-Many racers actually reduce their oil pressure trying to solve scavenge issues.
+Many racers actually reduce their oil pressure trying to solve scavenge issues. \\
-The last thing in the world you want to do is pump more oil into an XL engine. ((aswracing http://xlforum.net/forums/showthread.php?t=1589124&page=5))
+The last thing in the world you want to do is pump more oil into an XL engine. ((aswracing http://xlforum.net/forums/showthread.php?t=1589124&page=5)) \\
  The line returning from the oil filter pad feeds oil into the bottom of the cam box. ((aswracing http://xlforum.net/forums/showthread.php?t=803496)) \\
@@ Line 58: / Line 50: @@
 That's the only tight spot, the newer oil pump bolts right up otherwise. But, with a little grinding, it can be done. ((aswracing http://xlforum.net/forums/showthread.php?t=135265&page=4))
+==== Cam chest drain in 77-97 engines ====
+and up oil pumps will bolt straight up to 77 -97 engines. \\
+However, 77-97 engines drain the cam chest to the crankcase. \\
+'98 and later pumps all have a scavenge inlet in the cam box and therefore your motor's cam box to crankcase drain is not needed and actually not desirable. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=559906)) \\
+So a complete update would include plugging that drain. \\
+The '07 Buell pump has a bigger scavenge section than the standard Pro-Flow. \\
+Unless you go to a multi-section Pro-Flow and all the associated plumbing, you're better off with the 07 pump. \\
+{{:techtalk:evo:oil:pre-98_cam_chest_drain_by_aswracing.jpg?direct&300|}} ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=559906)) {{:techtalk:evo:oil:pre-2000_cam_chest_drain_by_aswracing.jpg?direct&350|}} ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=559906))
+**
+There is also another option of modding the oil pump cam drain port instead**. \\
+The cam port on the pump is blocked off. \\
+Currently the only known company that does this mod is Karling Racing in Sweden. \\
+See more on the [[techtalk:ref:oil05f|Karling Oil Pump Mod]] for the newer oil pumps here in the Sportsterpedia. \\
 ==== Internal vs external oiling features ====
@@ Line 64: / Line 71: @@
 When you take off the stock pump, it will expose a 1/8" hole in the bottom of the gear case.  ((aswracing http://xlforum.net/forums/showthread.php?t=803496)) ((jtracing919 http://xlforum.net/forums/showthread.php?t=803496)) \\
-This is the oil's internal point of entry from the pump. \\
+This is the oil's internal point of entry from the pump and where the 90° fitting goes. \\
 and up engine cases do not have this hole. \\
 |{{:techtalk:evo:oil:86-90_oil_port_location_by_gary_e_--_annotated.jpg?direct&300|}}|
-|  86-90 oil port location ((photo by Gary E of the XLFORUM, annotated by Hippysmack http://xlforum.net/forums/showthread.php?t=2071753))  |
+|  86-90 oil port location (app. dims) ((photo by Gary E of the XLFORUM, annotated by Hippysmack http://xlforum.net/forums/showthread.php?t=2071753))  |
 ==== Tapping a hole in the engine required ====
@@ Line 105: / Line 112: @@
   * Along with the oiling system change in 1998, the oil pump and mounting screws were made longer. \\ The gearcase drain was then isolated from the crankcase a scavenge inlet was added in the gear case. \\ This change applied to both Sportster and Buell models, though there's no difference between the two. \\ The part number for the screws on a 2007 Buell and 2003 Sportster are (4765). ((aswracing http://xlforum.net/forums/showthread.php?t=1589124&page=2)) ((http://xlforum.net/forums/showthread.php?t=1589124))
-    * The 86-90 style pumps use (4) - 1/4" x 20 x 2-1/2" mounting bolts. ((Gary E of the XLFORUM http://xlforum.net/forums/showthread.php?p=5714289#post5714289))
+    * The 86-90 style pumps use (4) - 1/4" x 20 x 2-1/2" Allen head mounting bolts. ((Gary E of the XLFORUM http://xlforum.net/forums/showthread.php?p=5714289#post5714289))
-    * The 91-97 style pump body and it's mounting bolts are slightly shorter than the 98 version (  Dim?  ).
+    * The 91-97 style pump body and it's mounting bolts are slightly shorter than the 98 version (  length?  ).
-    * The 98 and later pumps use (2) - 1/4" x 20 x 2-5/8" mounting bolts (2.625").
+    * The 98 and later pumps use (2) - 1/4" x 20 x 2-5/8" Allen head mounting bolts (2.625").
     * The 07 style pump body was made app. (.018“) taller than the 98.
-    * Worse case, you can buy a couple 2-3/4" bolts from your local hardware store and cut them to length.
+    * Worse case, you can buy a couple 2-3/4" Allen head bolts from your local hardware store and cut them to length.
   * The 77-90 oil pump to case mounting surface uses the same gasket. \\ In kind, the 90 and up oil pumps all use the same gasket.
@@ Line 122: / Line 129: @@
   * The hole to the right in the 3rd picture is where the oil exits the pump. \\ (not the hole in the engine case, which is further out)
-|{{:techtalk:evo:oil:77_and_98_oil_pump_comparison_2.jpg?direct&300|}}|{{:techtalk:evo:oil:77_and_98_oil_pump_comparison_3.jpg?direct&300|}}|{{:techtalk:evo:oil:77_and_98_oil_pump_comparison_4.jpg?direct&300|}}|
+|{{:techtalk:evo:oil:77_and_98_oil_pump_comparison_2.jpg?direct&300|}}|{{:techtalk:evo:oil:77_and_98_oil_pump_comparison_3.jpg?direct&300|}}|{{:techtalk:evo:oil:77_and_98_oil_pump_comparison_4b.jpg?direct&300|}}|
 |  77-85 style pump outlined with a Sharpie ((photo by Hippysmack http://xlforum.net/forums/showthread.php?t=2071153&page=6))  |  98 and up style pump outlined in pencil ((photo by Hippysmack http://xlforum.net/forums/showthread.php?t=2071153&page=6))  |  (77-90) and (91 up) gasket surface comparison ((photo by Hippysmack http://xlforum.net/forums/showthread.php?t=2071153&page=6))  |
@@ Line 138: / Line 145: @@
 Obviously, this would be the easiest way to drill and tap the hole, \\
 It'll keep the process from being awkward and allow you more control of the process. \\
-The hole can then be drilled / tapped with a hand drill or drill press.
+The hole can then be drilled / tapped by hand or in a drill press.
 With the rocker boxes off, you may be able to reposition, without removing, the engine to get the pump area away from the frame.\\
@@ Line 169: / Line 176: @@
 Before installing the oil pump, \\
 It'd be a good idea to check the condition of the oil pump drive gear on the pinion shaft for wear. \\
-See also [[techtalk:evo:oil03#oil_pump_drive_gear|Known Drive Gear Failure]] in the Evo oiling section of the Sportsterpedia. \\
+See also [[techtalk:evo:oil03#oil_pump_drive_gear|Known Drive Gear Failure]] and the Bronze Oil Pump Drive Gear Upgrade in the Evo oiling section of the Sportsterpedia.
-And the [[techtalk:evo:oil03b#to_present_bronze_oil_pump_drive_gear_upgrade_26391-06|1988 to present Bronze Oil Pump Drive Gear Upgrade (26391-06)]]
 |  Teeth worn thin on the stock oil pump gear. ((photo by Hippysmack))  |  Comparison with a new bronze gear. ((photo by Hippysmack))  |
 |{{:techtalk:evo:oil:oil_pump_gear_wear_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:oil_pump_gear_wear_2_by_hippysmack.jpg?direct&300|}}|
@@ Line 188: / Line 194: @@
 |{{:techtalk:evo:oil:07_oil_pump_upgrade_by_3_dave76.jpg?direct&300|}}|
+==== Other XLFORUM thread discussion on this mod ====
+[[http://xlforum.net/forums/showthread.php?t=2071753&highlight=86-90&page=3|Oil Pump Upgrade '86-'90]]
 \\
 [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]]

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