Torsion Bar Spring Rates |
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Torsion Bar Spring Rates |
joea9146 |
Mar 10 2006, 09:22 PM
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#1
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Senior Member Group: Members Posts: 663 Joined: 10-February 03 From: Denver, NC Member No.: 283 Region Association: None |
Searched around and found this : But which one is correct ?
Front Rates Torsion Kw (lb/in) Ks (lb/in) Dia (mm) (Wheel) (Spring) 16 77 90 17 97 112 18 122 138 18.5 137 154 19 152 170 20 187 207 21 227 249 22 273 298 23 327 355 ====================================================== > SIZE ( mm) SPRING RATE ( Lb/in) > 18.8 110 > 21 173 > 22 210 > 23 250 > 24 296 > 25 350 |
Sideways |
Mar 10 2006, 10:31 PM
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#2
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Member Group: Members Posts: 119 Joined: 18-October 05 From: Calgary, AB, Canada Member No.: 4,969 |
When a bar, coil spring etc is manufactured it has a certain rate, the spring rate. #200 for eg. The wheel rate is measured at or around the hub of the wheel (It s the spring rate the wheel 'see's'). Ie leverage comes into play, generally the wheel rate is lower that spring rate because the wheel is attached to the spring via a lever (the A arm) the difference between spring and wheel rate depends on the location of the spring and the length of the lever (among other things). In the case of a 914/911 the spring is at the piviot point of the arm and the lever is the lengthof the arm from the bushes to the plane of the hub. Does this help, this is very simplified...... |
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