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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Question of the month..!! Revisited
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[QUOTE="MACE, post: 69670, member: 16716"] I am using the wrong terms when refering to the base valves as high flow or low flow. The Cheese valve is a [i]high deflection[/i] valve and the Gold valve is a [i]low deflection[/i] valve. As Marcus said, they both pass the same amount of juice at a given wheel speed. I disagree that they both have the same shim deflection... Fluid velocity is the same (for given shaft speed) which of course means the volumetric flow rate is the same. If I have large circumferential port area (big hole) the valve stack will deflect [i]less[/i] to open sufficient port area for any given flow. Remember the size of the orifice is only what is available between shim and the mouth of the port. The flow area will be on the order of 2*pi*port radius*average deflection vs. the valve port area which is pi*port radius*port radius. You would have tremendously large shim deflection before the peripheral flow area is close to the port flow area. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Question of the month..!! Revisited
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