Shock Help

[Matt49]

Anything with small moving parts is fragile. More moving parts is more fragile (all else being equal in terms of material strength). I guess my question would be what are you guys finding needs to be replaced the most often when you get them "freshened" for dyno purposes. Obviously seals are one thing but shouldn't effect dyno numbers much. I would think that any shim is going to have a certain number of cycles it can go through before fatigue starts to set in. And fresh oil is required. What else would cause dyno numbers to significantly change on a mono-tube? I ask because I can't think of anything unless something is damaged from a wreck. Not a shock expert but I sure would like to be.

[Brian Gray]

heat is a big one, im not sure what alloys any mfg uses but i do see measurable changes between mfg as you let a shock heat up. another is the band, penske has went to a solid band where some others still use a split band .

on afco in particular if your running any bnc type compression the most wear i get is on the compression needle and bleed they do make a stainless one that seems to take the heat better.

most variance though with any of them is the mating surface of the piston they do distort over time and will cause the shock to change. specifically the powder metal pistons they need regular care.

[grt74]

im really not trying to start whos better or not,just my experience on a dyno,and no i dont claim to be any kind of expert,im a trail and error kind if guy,i work around engineers all day and have to fix there stuff all the time,i think its funny really(i love it when they have to pay me to fix it afterwards,most need to get real world experience) but anyways back to the subject,its all experience with me and if it works better i want to know why so i can repeat it and get better and better,

i do agree with b gray that heat is a huge factor along with cavitation

[grt74]

Really? Some brands have adjuster shaft sticking issues. Really something with most of them. The M2 type shocks have always worked well as far as durability, IMO.

if you over tighten the shock ends it will cause this,its an easy fix if that happens,

[dirtdiggerracing]

Just sent you a PM