he had explained to me that more bump means more progressive stop. makes the initial hit softer but does a better job at slowing the back end down before you are through its travel.Do tell...old wise grouchy one
I’ll see how this goes since it’s done. I tried running 50psi in the bumps, but they still felt super harsh.he had explained to me that more bump means more progressive stop. makes the initial hit softer but does a better job at slowing the back end down before you are through its travel.
i like running more oil in the bump (10cc from completely full and fully compressed) and then only 25-50psi in the bump. takes the harshness out of the initial hit but you know they are still there.
i pull the whole shrader off the top and then yes, fill to damn near the top, bleed, then all the way up and suck out 10cc.I’ll see how this goes since it’s done. I tried running 50psi in the bumps, but they still felt super harsh.
I only took out like 90cc of oil from each one when I had them apart. Fill is 125cc. So I’m thinking they had a large nitrogen volume, so they ramped up super fast and were basically too much for me.
Are you measuring the oil with the top cap off? So I would fill it with oil, bleed it, brim it to the top (bump fully collapsed) then pull 10cc out?
I like the idea of a small nitrogen volume for a softer bump.
Totally makes sense now. Thank you for the knowledgeOk
Your bump has to do X amount of work. Doing it in 4" gives it more time for the valving to work and you need less spring. Doing it in 2" will require much more spring.
Now, damping is pretty shitty in these as they are emulsion. Putting more oil in them will make the foam thicker and make them more effective at damping versus just working off the spring.
Now for the spring side. Your pressure is like preload. The oil volume/airspace sets your spring rate. Just adding pressure is like cranking down way to soft coils attempting to keep it from bottoming. It will make the initial contact harsh and still not prevent bottoming. You need just enough pressure to make them extend fully. Then adjust your airspace to get the spring rate you need to keep from ass ramming them home.
Apparently Fox has bumps with IFP's now. Go Fox!