At 12:07 AM 8/25/2015, Eric Caron wrote: >so does this sound like my front shocks were bad? is there a way to >test the old shock to know? The easiest test is on the vehicle. Stand on the bumper. When you quickly take your weight off, the vehicle should rebound but stop before it descends below its rest position. If it keeps on bouncing for several cycles they are dead dead dead. When I drove it the shocks were certainly not in that state or anywhere close. In system terms that degree of damping (one rebound but not crossing the zero line on the way back down) is called critically damped. Not rebounding past the zero would be overdamped and crossing zero more than once would be underdamped. Someone else will have to tell you how that relates directly to suspensions. Main function of a shock absorber is to turn mechanical motion into heat, thus leaching energy from the oscillating system of wheel/suspension and spring so that it doesn't oscillate. Ideally the wheels will track the road surface with constant pressure and the vehicle will not move in response to road irregularities. That's only likely to be achieved with an active suspension using electronics and pumps. Some shocks are filled with pressurized gas that also exerts a spring action -- you can't really compare the feel of those directly against ones that don't, since the others don't have any preferred position, they just don't like to move away from any position. Yours, David |
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