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Cylinder Valves
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[QUOTE="Jeremy Wilkey, post: 696935, member: 17220"] Guys, I've got to step back from this for a minute, but you guys are going off into la-la land.. Heres the deal apples to apples a valve works by controlling the area of effective orifice.. An effective orifice is created by the multi dimensional space that's created by the shims and the piston as the shims bend.. As we bend shims they store energy.. The more we bend them the more energy they store.. Bending 1 shim a large value could equal the force of many shims bent a little. When we stack washers we are making a stiffer collective spring... Now if we have a piston that has large area then when a shim bends even a little bit it creates a large effective orifice area.. A bigger effective orifice means softer suspension.. Is everyone still with me.. Now the faster the fork moves the more pressure that is created and the greater the stack opens given the same shim stack.. The more the stack opens, the larger the area of the effective orifice, and also the faster that the orifice gains area, berceuse its growing in multiple dimensions.. So when we need to control this orifice area to produce a certain damping coeifecnt defined as a total orifice size we must stack shims on to limit the orifice from growing to quickly and making the suspension soft.. If we limit it too much then the suspension is hard.. Make sense? The shims as they deflect are just like a spring.. They are storing energy... Now for the next bit.... Lets say we have a valve that produces larger deflections for the same volume of fluid. This valve will have less exposed area when the shims bend. The shims must bend farther to create the same orifice area, as a high flow piston with a larger potential exposed area... Instead of bending many shims a small amount to create area X and Force of shim resistance Y we are bending a few shims to larger amount to create similar area x and force values.. That being the case within a range relevant to the application a higher area piston must use more shims to control the same total orifice area as a piston with less area and more deflection.. The lower flow piston bends the shims more to get the energy it needs to resist rate of growth and high flow bends many shims a little to get the same stored energy... Jer [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Cylinder Valves
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