- Thread starter
- #26
Jeremy
I agree and disagree with some of your points. Firstly in order to achieve as similar feel with different pistons your'e right! You do require a similar total energy effect. But piston port diameter will always have an effect on flow. High flow pistons don't require more shims, they require less. The pressure is dispersed over a greater area of the shim resulting in more spring force being generated from that shim with less overall deflection. (Distance from the piston face.) Also any orifice creates friction loss affecting flow rate. The smaller the orifice, the greater the friction loss. A piston with smaller ports concentrates the flow in a smaller area creating greater pressure. This is similar to a woman with high heels and a woman in sneakers walking on a cork floor. Both women may be of similar weight, but one is applying a lot more pressure to the floor than the other and more likely to depress the surface. An easy test for high flow / low flow pistons is to use them both with the same shimstack and feel the difference. And you will feel it. As a manufacturer and retailer of pistons yourself, I'm suprised you would make the comment that they create no effect. At the end of the day, it's the final result that matters. If you can achieve rider satisfaction, the fact that you have achieved it is more important than how. (To the rider)
I agree and disagree with some of your points. Firstly in order to achieve as similar feel with different pistons your'e right! You do require a similar total energy effect. But piston port diameter will always have an effect on flow. High flow pistons don't require more shims, they require less. The pressure is dispersed over a greater area of the shim resulting in more spring force being generated from that shim with less overall deflection. (Distance from the piston face.) Also any orifice creates friction loss affecting flow rate. The smaller the orifice, the greater the friction loss. A piston with smaller ports concentrates the flow in a smaller area creating greater pressure. This is similar to a woman with high heels and a woman in sneakers walking on a cork floor. Both women may be of similar weight, but one is applying a lot more pressure to the floor than the other and more likely to depress the surface. An easy test for high flow / low flow pistons is to use them both with the same shimstack and feel the difference. And you will feel it. As a manufacturer and retailer of pistons yourself, I'm suprised you would make the comment that they create no effect. At the end of the day, it's the final result that matters. If you can achieve rider satisfaction, the fact that you have achieved it is more important than how. (To the rider)