Differences

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--- techtalk:evo:engmech02a [2018/09/03 23:13]
hippysmack [Cam Identification]
+++ techtalk:evo:engmech02a [2020/10/25 00:38]
ixl2relax [Cam Timing Mark Identification]
@@ Line 41: / Line 41: @@
 **Note**: If your cams have “V” markings on them, disregard those markings. The “V” markings on the cams are not used for timing Sportsters. ((Turbota of the XLFORUM http://xlforum.net/forums/showthread.php?t=26379)) {{:techtalk:evo:engmech:cam_markings_by_bsaman.jpg?direct&400|}} ((photo by bsaman of the XLFORUM http://xlforum.net/forums/showthread.php?t=693559&page=2)) {{:techtalk:evo:engmech:cam_timing_by_austinxl.jpg?direct&400|}} ((photo by AustinXL of the XLFORUM http://xlforum.net/forums/showthread.php?t=1701132))
-Here's a Buell XB using the 'V' timing marks on the cams. ((photo by soulhamster of the XLFORUM http://xlforum.net/forums/showthread.php?t=1321505&page=3)) \\
+Here's a Buell Blast (single cylinder) using the 'V' timing marks on the cams. ((photo by soulhamster of the XLFORUM http://xlforum.net/forums/showthread.php?t=1321505&page=3)) \\
 {{:techtalk:evo:engmech:buell_v_mark_on_cams_by_soulhamster.jpg?direct&500|}}
 ==== Working Around the Lifters If Installed ====
@@ Line 96: / Line 96: @@
 |**#1** cam dot faces the center of the #2 cam bore|**#3** has two dots. Each dot faces toward the center \\ of the two adjacent cam bores (#2 and #4 respectively). \\ The dots won't line up correctly installed upside down.|
 |{{:techtalk:evo:engmech:installing_evo_cams_5_by_phillober.jpg?direct&400|}}|{{:techtalk:evo:engmech:installing_evo_cams_6_by_phillober.jpg?direct&400|}}|
+| 86-90 cam alignment ((photo by iwntobliku of the XLFORUM http://xlforum.net/forums/showthread.php?t=50047))|
+|{{:techtalk:evo:engmech:89_cams_lined_up_by_iwntobliku.jpg?direct&400|}}|
   * #4 cam can be installed at any time after #3 is in place and it's the least of the worries of installing incorrectly (outside of checking that the cam number is correct).
@@ Line 108: / Line 111: @@
   * Sometimes, the cam marks leave room for interpretation as in don't quite line up dead bang. \\ The root cause of the problem is the clearance between the camshafts and their respective bushings. \\ Without the cover in place, the cams hang down some. \\ Some hang down more than others because they have less support. \\ It's particularly bad on the #1 cam, as pictured, because the #1 cam sags down and the #2 cam doesn't (it's supported by the pinion gear). \\ And, you're relying on a mark on the #1 cam that's not directly on the teeth. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=693559))
+  * If it's advanced a tooth, you'll lose power by opening the exhaust too early, essentially dumping power right out the exhaust before it's done pushing on the piston. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=693559&page=3)) You may even make your pipes glow red. You'll also lose a lot of overlap, meaning you'll lose exhaust augmentation of intake flow, again costing power.
+  * If it's retarded a tooth, you'll likely get valve to piston contact. The piston chases the exhaust valve closed, and if the valve is that late getting closed, the piston will likely catch it. If you're using cams with very little overlap to begin with, say "D" cams, you might get away with it, but with most any performance oriented grind, you don't have that much margin.
 {{:techtalk:evo:engmech:cam_alignment_by_hippysmack.jpg?direct&400|}} ((photo by Hippysmack)) {{:techtalk:evo:engmech:cam_timing_2_by_austinxl.jpg?direct&400|}} ((photo by AustinXL of the XLFORUM http://xlforum.net/forums/showthread.php?t=1701132))
@@ Line 118: / Line 123: @@
     - Cam #2 to cam #1.
     - Cam #2 to cam #3.
+**Another consideration**:
+The position of the mark on the pinion gear to line up #2 cam is straight across from the slot in the back of the gear. \\
+This slot can be widened with wear and not line up perfectly with the keyway on the pinion shaft. \\
+The key is actually what #2 cam should line up with. \\
+So if the pinion gear is off a little from the woodruff key location, the cams can appear not to line up perfectly together (even though they are). \\
+So while lining up the pinion gear and #2 cam, there may be a fudge factor there also to consider when the dots aren't lined up perfectly. \\
+You can see that the pinion gear is installed to the right of the center of the slot in the third pic below. \\
+{{:techtalk:evo:engmech:pinion_gear_keyway_clearance_by_grind_-_labeled_by_hippysmack.jpg?direct&300|}} ((photo by ~Grind~ of the XLFORUM, labeled by Hippysmack http://xlforum.net/forums/showthread.php?t=1448694)) \\
+|  Be in mind of the woodruff key location in the pinion gear slot. ((photos by ~Grind~ of the XLFORUM http://xlforum.net/forums/showthread.php?t=1448694))  |||
+|{{:techtalk:evo:engmech:pinion_gear_alignment_on_woodruff_key_1_by_grind.jpg?direct&300|}}|{{:techtalk:evo:engmech:pinion_gear_alignment_on_woodruff_key_2_by_grind.jpg?direct&300|}}|{{:techtalk:evo:engmech:pinion_gear_alignment_on_woodruff_key_3_by_grind.jpg?direct&300|}}|
 ===== Before Installing the Cam Cover =====
@@ Line 124: / Line 142: @@
 |{{:techtalk:evo:engmech:installing_evo_cams_12_by_phillober.jpg?direct&400|}}|{{:techtalk:evo:engmech:installing_evo_cams_13_by_phillober.jpg?direct&400|}}|
+|Some like more than others but the more lube, the better. \\ Just be sure not to put thick lube in the pinion shaft hole and block the oil path. ((photo by chris_b_owens of the XLFORUM http://xlforum.net/forums/showthread.php?t=1843303&page=4))||
+|{{:techtalk:evo:engmech:cam_gears_installed_1_by_chris_b_owens.jpg?direct&400|}}|{{:techtalk:evo:engmech:cam_gears_installed_2_by_chris_b_owens.jpg?direct&400|}}|
 ===== Damage Pics From Incorrect Cam Timing =====

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