Suspension/Shock question
12-08-2010 | 11:01 PM
#1
Suspension/Shock question
I was talking to a shock re builder today about rebuilding
and re-valving and making them externally adjustable for
both compression and rebound.
I gave him my corner weights & the spring rate's but then
he asked if I knew what the "motion rates" of the shocks were.
He said if I took out the coil spring and moved the suspension
up and down with only the shock in place that I could measure
how far the shock moved in relation to the suspension.
So if the suspension was moved exactly one inch -- how far, in inches
did the shock move = motion ratio
Does anyone already have this info ?
Thanks ..
and re-valving and making them externally adjustable for
both compression and rebound.
I gave him my corner weights & the spring rate's but then
he asked if I knew what the "motion rates" of the shocks were.
He said if I took out the coil spring and moved the suspension
up and down with only the shock in place that I could measure
how far the shock moved in relation to the suspension.
So if the suspension was moved exactly one inch -- how far, in inches
did the shock move = motion ratio
Does anyone already have this info ?
Thanks ..
12-08-2010 | 11:53 PM
#2
Rest in Peace
Rennlist Member
Rennlist Member
I would think if you take the springs out you are not going to move it at all??????????????
Or are they talking about with weight off the car?
Or are they talking about with weight off the car?
12-09-2010 | 02:29 AM
#3
Rennlist Member
He meant "if it was possible"
Basicallty the mount angle of the shock/etc comes into play.
The fender lip goes down 1", but due to mounting geometry, the shock only compressed 3/4".
It can never move MORE, and is highly unlikelty to move at the same rate..I would expect about a 1/8" difference.
Seems simple to measure.
Put a collar around the shock rod that fits snug..like a split fuel line hose, or whatever ID hose would fit snugly around the rod..have it all the way slid to the point where the rod enters the shock.
Get a manner pull the corner of the car -straight- down 1" exactly, then release it.
Measure the gap between the shock body and the edge of the split hose that is now "about one inch" away from where it was up against it.
??
Basicallty the mount angle of the shock/etc comes into play.
The fender lip goes down 1", but due to mounting geometry, the shock only compressed 3/4".
It can never move MORE, and is highly unlikelty to move at the same rate..I would expect about a 1/8" difference.
Seems simple to measure.
Put a collar around the shock rod that fits snug..like a split fuel line hose, or whatever ID hose would fit snugly around the rod..have it all the way slid to the point where the rod enters the shock.
Get a manner pull the corner of the car -straight- down 1" exactly, then release it.
Measure the gap between the shock body and the edge of the split hose that is now "about one inch" away from where it was up against it.
??
12-09-2010 | 04:04 AM
#4
Rennlist Member
hi, I have written down from some post that the front spring lever ratio is 2.05:1.
search spring rates.
The back is different.
I think you would need to measure at the center of the wheel, or edge of tyre as this would be the furthest point.
If you have the car jacked up and the spring removed, shock in place, the centre of the wheel to the ground , with a 170mm ride height, is about 470mm, then use a jack under the ball joint to move the A arm. Measure shock movement to wheel movement.
Leder make a set, also email Wilbers Shocks in Germany, very nice products, i have a Wilburs on the back of my Duke. Koni told me there was no kit, they would have to make on up from what ever parts they could find, cost unknown.
caveats apply!!!
search spring rates.
The back is different.
I think you would need to measure at the center of the wheel, or edge of tyre as this would be the furthest point.
If you have the car jacked up and the spring removed, shock in place, the centre of the wheel to the ground , with a 170mm ride height, is about 470mm, then use a jack under the ball joint to move the A arm. Measure shock movement to wheel movement.
Leder make a set, also email Wilbers Shocks in Germany, very nice products, i have a Wilburs on the back of my Duke. Koni told me there was no kit, they would have to make on up from what ever parts they could find, cost unknown.
caveats apply!!!
12-09-2010 | 07:52 AM
#5
Addict
Rennlist Member
Rennlist Member
hi, I have written down from some post that the front spring lever ratio is 2.05:1.
search spring rates.
The back is different.
I think you would need to measure at the center of the wheel, or edge of tyre as this would be the furthest point.
If you have the car jacked up and the spring removed, shock in place, the centre of the wheel to the ground , with a 170mm ride height, is about 470mm, then use a jack under the ball joint to move the A arm. Measure shock movement to wheel movement.
Leder make a set, also email Wilbers Shocks in Germany, very nice products, i have a Wilburs on the back of my Duke. Koni told me there was no kit, they would have to make on up from what ever parts they could find, cost unknown.
caveats apply!!!
search spring rates.
The back is different.
I think you would need to measure at the center of the wheel, or edge of tyre as this would be the furthest point.
If you have the car jacked up and the spring removed, shock in place, the centre of the wheel to the ground , with a 170mm ride height, is about 470mm, then use a jack under the ball joint to move the A arm. Measure shock movement to wheel movement.
Leder make a set, also email Wilbers Shocks in Germany, very nice products, i have a Wilburs on the back of my Duke. Koni told me there was no kit, they would have to make on up from what ever parts they could find, cost unknown.
caveats apply!!!
