Turbin, I've asked this question loads of times of loads of different people and suspension suppliers. Even Seat cannot tell me, it's crazy.
What bugs me is how can so called suspension specialists sell an upgraded system without knowing the OEM spring rate??
Good luck, I have OEM spring in my shed but they don't say anything about the rate only VAG secret colour coding
What bugs me is how can so called suspension specialists sell an upgraded system without knowing the OEM spring rate??
Good luck, I have OEM spring in my shed but they don't say anything about the rate only VAG secret colour coding
turbin
Guest
MR2 super GT
Guest
how would spring rate be measured?
as the spring will not be uniform, the rate increasing as the spring is compressed i would imagine.
Therefore the same spring fitted to different cars would have a different rate? or does it not work like this?
(im thinking that a light car that doesnt compress the spring when its simply sitting on the spring can be easily measured, but a heavier car that compresses the spring simply due to the weight of the car would in effect have increased the spring rate?
but then springs work in both directions, to compress and then rebound to keep the tyre on the road surface.
But i do agree that there is zero info out there. I want to know if i have an option of say 5 different sets of coilovers or springs/shocks, which ones are harsher and which ones more compiant.
Ive asked suppliers, shops, garages, nobody can give me any info, its so agrivating. Ive also asked on here and there is little info, but not for a laock of help from members, there does seem to be no info out there.
as the spring will not be uniform, the rate increasing as the spring is compressed i would imagine.
Therefore the same spring fitted to different cars would have a different rate? or does it not work like this?
(im thinking that a light car that doesnt compress the spring when its simply sitting on the spring can be easily measured, but a heavier car that compresses the spring simply due to the weight of the car would in effect have increased the spring rate?
but then springs work in both directions, to compress and then rebound to keep the tyre on the road surface.
But i do agree that there is zero info out there. I want to know if i have an option of say 5 different sets of coilovers or springs/shocks, which ones are harsher and which ones more compiant.
Ive asked suppliers, shops, garages, nobody can give me any info, its so agrivating. Ive also asked on here and there is little info, but not for a laock of help from members, there does seem to be no info out there.
MR2 super GT
Guest
Spring rate of the spring will remain the same. Changing which car it goes on has no effect.
I'm trying to work out the sprig rates as we speak so will post up soon. They are from a mk1 tdi fr
I'm trying to work out the sprig rates as we speak so will post up soon. They are from a mk1 tdi fr
MR2 super GT
Guest
This may help some but it didn't help me.
http://forums.tdiclub.com/showthread.php?t=308471
My rear springs have 1 x white an 4 x blue marks
Fronts have 2 x pink an 2 x blue
My calculations didn't work out. I think the rear rate would be close to 150 lb/in and front 160 lb/in
http://forums.tdiclub.com/showthread.php?t=308471
My rear springs have 1 x white an 4 x blue marks
Fronts have 2 x pink an 2 x blue
My calculations didn't work out. I think the rear rate would be close to 150 lb/in and front 160 lb/in
I agree the actual spring rate of the spring doesnt change just by fitting it on a different car; but surely the 'static' rate thats provided will change on the basis that a heavier car will compress the spring more just to hold the cars weight. Assuming the effort/force/weight required to compress a spring increases the more its compressed then the weight of the car will effect how much the spring is 'preloaded'.
I might well be talking cr@p as im pretty much making it up as i go, - but i do know that if you have two springs made of the same material and dimensionally the same (length of spring) the one with more 'turns'/twists will be easier to compress, - many people think the opposite.
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MR2 super GT
Guest
Could someone with a leon mk1 fr tdi do me a huge favor?
Try and measure the closed spring height front and rear with wheels on the ground then open height with wheels off the ground?
I have the standard springs off the car now trying to get some custom ones made but need that information to help...
Try and measure the closed spring height front and rear with wheels on the ground then open height with wheels off the ground?
I have the standard springs off the car now trying to get some custom ones made but need that information to help...
A helical spring is just a coiled torsion bar. Spring rate would be set by the material and the diameter of the rod that makes up the spring. Other important parameters are unloaded length, coil diameter and end arrangements (so they fit into your spring seats), but they don't change the spring rate.
Springs can also be progressive, which means the coil separation varies over the length of the spring, varying the response as the closer coils collapse together and touch. For a normal spring the response is linear i.e. no matter how much the spring is compressed its response to changes in load is still the same.
andy, by adding another coil to the spring you've made the torsion bar longer so it will deflect further for a given load.
Springs can also be progressive, which means the coil separation varies over the length of the spring, varying the response as the closer coils collapse together and touch. For a normal spring the response is linear i.e. no matter how much the spring is compressed its response to changes in load is still the same.
andy, by adding another coil to the spring you've made the torsion bar longer so it will deflect further for a given load.
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