Discussion
Hi GV8S.I am replacing all the springs and have already replaced the fronts but was sent the wrong ones for the rear (was sent S1 springs and are 45mm smaller) But they dont have any for the rear. They are going to have to get them made, I have the size of them (255mmlong) 63mm ins dia but I cant find out the load for them (lbs). Am getting the car "corner weighted" and the orig springs are done. Tried the S1 springs (on AVO adjustables) but car is sitting about 8" of the ground at the lowest setting and if I try to lower it any more the s1 spring is loose in the shock when I jack the car up of the ground.Only other way is to cut the shock and reduce the "free travel" but this has to be plan f as I dont want to go down that road.
If you're fitting them on AVOs (yuk, but that's another story) then you need them the right length for those dampers. This will probably need to be a different length to the originals which were for Konis. Knowing the original length is no good to you. I can look out the rate of my original springs tonight if you want, but they're dual rate so if you're changing to single rate you have some choices to make. Amongst other things it will need to suit your new front springs. Are the damper lengths correct? What are the fully open and fully closed lengths between the end fittings?
Hi. Maybe yuk but trying to run 2 TVR's (mine is 500 chim) this is the wifes I am tinkering with (she is very under standing) but I only want to spend so much on her (dont want to spoil her)Now am I talking about the car or the wife (I will leave that to you). But back to buisness I have already measured the old shocks (14" hole to hole)extended and the Avo's are the same (have been using the avo's for the last year on the old springs)
So i am happy with the length but it is just the poundage i think I am stuck about.
ray
So i am happy with the length but it is just the poundage i think I am stuck about.
ray
OK the fully open length is about right, you've lost about half an inch on the droop travel but that's no bad thing if you're raising the spring rate. The original rear springs were dual rate 180/270 lbs/in. I don't know what spring rate you need now, it depends what you've done on the front.
You will need to work out the correct spring length. You may already have done this, but if not you can do it from the damper length at full droop and at normal ride height, and the load on the spring, and the range of spring lengths you can get on your damper at normal ride height. You already have the fully open length, length at normal ride is about 13", the static load on the spring is roughly 850 lbs, you will need to measure the spring seat positions.
Also make sure you get the bump stop lengths right, they're often forgotten but are important to stop the car bottoming out or (worse) putting a tyre through the wheel arch.
You will need to work out the correct spring length. You may already have done this, but if not you can do it from the damper length at full droop and at normal ride height, and the load on the spring, and the range of spring lengths you can get on your damper at normal ride height. You already have the fully open length, length at normal ride is about 13", the static load on the spring is roughly 850 lbs, you will need to measure the spring seat positions.
Also make sure you get the bump stop lengths right, they're often forgotten but are important to stop the car bottoming out or (worse) putting a tyre through the wheel arch.
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