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--- techtalk:evo:susp02c [2017/09/16 15:30]
hippysmack [Some Testing on the XL1200S Shocks (and mods)]
+++ techtalk:evo:susp02c [2017/09/16 16:07]
hippysmack
@@ Line 1: / Line 1: @@
+[[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
 ====== EVO: Suspension - Sub-02C ======
+====== Characterizing the 1200S Shock Damping  ======
+  * If you move the compression dial from one end to the other, you would count 16 clicks and see it goes almost 4 times around, so each click is worth 90 degrees of rotation - but what does that mean?
+  * I found I can use one of my shock compression tools to test the shock (minus the spring) to see what the characteristic of the [compression and rebound] damping adjustments are on a shock. I use a stopwatch to see how long it takes to compress the shock for a given dial setting. The relative time comparison between compression and rebound times allow you to pick a strategy to get to a 2.5 to 1 or maybe as high as 3 to 1 (this is more of a cruiser than a knee dragging ride).
+|{{:techtalk:evo:susp:testing_2035_zps3fwhvyuy_by_spacetiger.jpg?direct&300|}}|{{:techtalk:evo:susp:testing_2036_zpsoundoc5i_by_spacetiger.jpg?direct&300|}}|{{:techtalk:evo:susp:testing_2037_zpskkcnpkvm_by_spacetiger.jpg?direct&300|}}|
+|The test rig ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|Put the shock into the lowest compression damping \\ setting ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|Write down the time for all 10 drops; take out the \\ highest and lowest number; then average the times. \\ The average is the time for that dial setting. Rotate \\ the dial 360 degrees, then repeat time collection. Do \\ this until you are at the end. For the compression dial, \\ the last try only move 279 degrees, not a full 360 \\ degrees ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|
+|{{:techtalk:evo:susp:testing_2038_zps2jyp8oex_by_spacetiger.jpg?direct&300|}}|{{:techtalk:evo:susp:testing_2039_zpsom8rdtpd_by_spacetiger.jpg?direct&300|}}|{{:techtalk:evo:susp:testing_2040_zpsrjntou8z_by_spacetiger.jpg?direct&300|}}|
+|Plotting the average times per 360 degree rotation \\ yields this graph. You can see, not much happens \\ the first 720 degrees. ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|Time to flip the shock and test the rebound damping. \\ Dial back to the lowest rebound setting and paint a \\ reference mark ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|Collect the data the same way as the compression \\ testing. The rebound dial only goes around three \\ 360 degree turns. ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|
+|{{:techtalk:evo:susp:testing_2041_zpsch45jzte_by_spacetiger.jpg?direct&300|}}|{{:techtalk:evo:susp:testing_2042_zpsflxdyohh_by_spacetiger.jpg?direct&300|}}|
+|The Rebound damping timing curve ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|Put the two curves together and you can see the \\ damping strategy shooting for the highest ratio \\ desired (3.0). You dial in ALL the rebound damping, \\ then dial in zero compression damping. That sets you \\ up with a 2.7 ratio. You can walk in compression \\ damping as needed. I would work in 0.2 ratio \\ increments (can our butts feel 0.1 increment \\ changes??) ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) ✔|
+  * High speed compression dampening can't be done on the bench. You have to do that with your butt on the road. I have found if you avoid the pot holes, it may not be critical for how you ride. ((spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5))
 ====== Some Testing on the XL1200S Shocks (and mods) ======
@@ Line 54: / Line 74: @@
-==== Characterizing the 1200S Shock Damping  ====
-  * If you move the compression dial from one end to the other, you would count 16 clicks and see it goes almost 4 times around, so each click is worth 90 degrees of rotation - but what does that mean?
-  * I found I can use one of my shock compression tools to test the shock (minus the spring) to see what the characteristic of the [compression and rebound] damping adjustments are on a shock. I use a stopwatch to see how long it takes to compress the shock for a given dial setting. The relative time comparison between compression and rebound times allow you to pick a strategy to get to a 2.5 to 1 or maybe as high as 3 to 1 (this is more of a cruiser than a knee dragging ride).
-|{{:techtalk:evo:susp:testing_2035_zps3fwhvyuy_by_spacetiger.jpg?direct&300|}}|{{:techtalk:evo:susp:testing_2036_zpsoundoc5i_by_spacetiger.jpg?direct&300|}}|{{:techtalk:evo:susp:testing_2037_zpskkcnpkvm_by_spacetiger.jpg?direct&300|}}|
-|The test rig ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|Put the shock into the lowest compression damping \\ setting ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|Write down the time for all 10 drops; take out the \\ highest and lowest number; then average the times. \\ The average is the time for that dial setting. Rotate \\ the dial 360 degrees, then repeat time collection. Do \\ this until you are at the end. For the compression dial, \\ the last try only move 279 degrees, not a full 360 \\ degrees ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|
-|{{:techtalk:evo:susp:testing_2038_zps2jyp8oex_by_spacetiger.jpg?direct&300|}}|{{:techtalk:evo:susp:testing_2039_zpsom8rdtpd_by_spacetiger.jpg?direct&300|}}|{{:techtalk:evo:susp:testing_2040_zpsrjntou8z_by_spacetiger.jpg?direct&300|}}|
-|Plotting the average times per 360 degree rotation \\ yields this graph. You can see, not much happens \\ the first 720 degrees. ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|Time to flip the shock and test the rebound damping. \\ Dial back to the lowest rebound setting and paint a \\ reference mark ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|Collect the data the same way as the compression \\ testing. The rebound dial only goes around three \\ 360 degree turns. ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|
-|{{:techtalk:evo:susp:testing_2041_zpsch45jzte_by_spacetiger.jpg?direct&300|}}|{{:techtalk:evo:susp:testing_2042_zpsflxdyohh_by_spacetiger.jpg?direct&300|}}|
-|The Rebound damping timing curve ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) →|Put the two curves together and you can see the \\ damping strategy shooting for the highest ratio \\ desired (3.0). You dial in ALL the rebound damping, \\ then dial in zero compression damping. That sets you \\ up with a 2.7 ratio. You can walk in compression \\ damping as needed. I would work in 0.2 ratio \\ increments (can our butts feel 0.1 increment \\ changes??) ((Photo by spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5)) ✔|
-  * High speed compression dampening can't be done on the bench. You have to do that with your butt on the road. I have found if you avoid the pot holes, it may not be critical for how you ride. ((spacetiger of the XLFORUM http://xlforum.net/vbportal/forums/showthread.php?t=1863121&page=5))

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