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Arguably, the important thing given their length, is that they have an internal bumpstop on full extension. Without that they will be knackered eventually.
My triumph 2000 (IRS) uses such dampers to limit movement. Without the damper the spring falls out!
They do, as Alex says look a bit short though. Not much suspension drop available.
My triumph 2000 (IRS) uses such dampers to limit movement. Without the damper the spring falls out!
They do, as Alex says look a bit short though. Not much suspension drop available.
Mate. measure the total droop of the spring,max compression if you can (jack the opposite front carner of the car to fully load the sring) find a data point (the shock mounts are best as they componsate for rotational movement in the shock) so we can see the total travel involved, the total length of the shock on the car now(eyelet to eyelet centres) and min length (fully compressed same data points) once we have that data we can start to work out what you need.
HELLO! Surely the shocks must account for all the springs' travel plus some. If it doesn't, the shock will bear some stupid forces that it is not designed for......They are only there to damp the force of the springs and nothing more. Your shocks are WAY too short Dave. When our cars launch they unwind the rear part of the spring and you will be severely traction limited if your car is hung up by the shocks. (hence extended A-body dampers for use with SS springs) Or am I talking outta my butt??
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The name is Kev, nowadays known as Kevvy or Pommie C***!</center>
The name is Kev, nowadays known as Kevvy or Pommie C***!</center>
cars dont have much to limit to axle travel (especially coil sprung !) so the shock is what stops it, so yes shocks are designed to reach the end of their travel. a shock that is to long is ABSOLUTELY A NONO as it could fully compress and cause damage to itself or the mountings as it gets crushed between the speedbump and the bodyweight. Too short, really not a problem and could even be a benefit preventing excessive body roll during extreme swerving!
if really too short you may notice them clonking as they lock when braking very hard, especially if trunk empty
only other prob i can really see with shox that are too short is trouble removing the rear wheels during a puncture as the axle may not drop low enough to get a large wheel out. if jacking on the axle anyway, then of course the shocks make no difference to that.
if really too short you may notice them clonking as they lock when braking very hard, especially if trunk empty
only other prob i can really see with shox that are too short is trouble removing the rear wheels during a puncture as the axle may not drop low enough to get a large wheel out. if jacking on the axle anyway, then of course the shocks make no difference to that.
- Dave-R
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Sorry but I am REALLY hi-jacking your thread now Neil.
OK I have twisted the car as much as I dare to put as much weight as possible onto one rear wheel with no weight at all on the other. So we can see the total amount of travel I need.
This is with the rear anti-roll bar in place mind which will limit this movement of course but as I want a real world test this if fine.
Two photos of the wheels first.
OK I have twisted the car as much as I dare to put as much weight as possible onto one rear wheel with no weight at all on the other. So we can see the total amount of travel I need.
This is with the rear anti-roll bar in place mind which will limit this movement of course but as I want a real world test this if fine.
Two photos of the wheels first.
- Dave-R
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So as you can see from the photos.
On the compressed side the wheel does not go up very much at all from its normal resting position.
On the rebound side the max unloaded position of the lower shock mount is JUST lower than the shock will extend to.
So if the shock was just a few inches longer it would be fine. As it is it is very possible that the shock has NEVER extended to its full length except when flying Dukes style over crests in the road.
On the compressed side the wheel does not go up very much at all from its normal resting position.
On the rebound side the max unloaded position of the lower shock mount is JUST lower than the shock will extend to.
So if the shock was just a few inches longer it would be fine. As it is it is very possible that the shock has NEVER extended to its full length except when flying Dukes style over crests in the road.
- Dave-R
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So in answer to Alex's question. They need to be about 24" or more long to allow both wheels to drop all the way when flying and they need to compress to a length of, say, 18" or less.
Last edited by Dave-R on Sat Jan 15, 05 3:19 pm, edited 1 time in total.