Corner weight adjustment, I'm way out!
Discussion
Mignon said:
I really don't see the problem here.
The corner weights indicate there's about 47Kgs worth of jacking in there i.e. it needs about 47Kgs removing from the 'heavy' corners and adding to the 'light' ones. 47 Kgs is quite a lot and I'm advising the OP to understand what is causing that before trying to correct it. It might be caused by a twisted chassis, or a bent suspension arm, or a collapsed bush, a spring that has sagged/broken or the wrong length or rate. Most of these are things you'd want to correct rather than just move the spring seats to compensate. If the problem is actually that the ground wasn't quite flat, which I think is more likely, then this exercise will be making the corner weights worse not better. It shouldn't be particularly complicated or difficult to do, but it needs doing.Well chaps. I will now eat humble pie. I got fussy with the spirit level. And tried again. Also I realised the front right tyre was under pressure. Watching the weight change as I pumped it up was a good indicator of how height can change the weights.
I weighed it each time after changing one thing.
On its own the car is actually ok, with me in it it's out. But seeing as I had to get the scales back today and I'll be making changes over the winter I'll set it again on my mates MOT ramps which are level.
I weighed it each time after changing one thing.
On its own the car is actually ok, with me in it it's out. But seeing as I had to get the scales back today and I'll be making changes over the winter I'll set it again on my mates MOT ramps which are level.
chrisgtx said:
Glad to hear you've eliminated most of the error. That's within a couple of kilos of spot on, and you can probably assume those last few kilos are caused by stiction, and the floor not being perfectly flat and so on.Corner weight adjustment is IMO a waste of effort most of the time since the only situation where it does any good is when the weight is significantly offset sideways and you also have very different wheel rates front/rear. The rest of the time, any difference between your ideal and actual corner weights is telling you there's something wrong with the vehicle or your measurements, and adjusting spring seats isn't the right solution for any of those problems.
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