Corner weight adjustment, I'm way out!
Discussion
I managed to get my hands on some scales to weigh my sprint/hillclimb car just to see how it sits.
Even with my limited knowledge,It's way out!
The floor was level, anti roll bars still connected, and me sitting in it.
It's on coil overs and all I did originally was wind the spring just to touch the load ring and then set the heights equally from hub to strut top.
Tomorrow I'm going to increase the LR height first to see how that changes things, any tips, this is only a chance to mess about getting it a bit closer as there is some weight to come out the car and move a small amount of ballast.
Any tips?
Even with my limited knowledge,It's way out!
The floor was level, anti roll bars still connected, and me sitting in it.
It's on coil overs and all I did originally was wind the spring just to touch the load ring and then set the heights equally from hub to strut top.
Tomorrow I'm going to increase the LR height first to see how that changes things, any tips, this is only a chance to mess about getting it a bit closer as there is some weight to come out the car and move a small amount of ballast.
Any tips?
I should of re phrased that and said the plates were level, had to pack up the fronts.
As a matter of interest I tried them without, albeit not by much and there wasn't a massive difference.
I've been reading up and the cross weights are added up and divided the the total weight, according to the article I read I should be getting oversteer but understeer was mine.
As a matter of interest I tried them without, albeit not by much and there wasn't a massive difference.
I've been reading up and the cross weights are added up and divided the the total weight, according to the article I read I should be getting oversteer but understeer was mine.
Yes it's a tin top, mazda 323 GTX, i will cross check the levels again and disconnect the roll bars.
I've owned it for 16 years and the shell is straight, I put a new set of racing logic coil overs on it years ago with hard springs. And it's stripped out, no interior.althought I've got my 17 inch road wheels on it not my 15 inch competition wheels on which would save 25kg.
Considering how it looks on the scales it drove well and I've cracked some class records, albeit with a bit of 4WD understeer.
What I was surprised by is the differences in the front, as the engine block is on the right (and me) and the left front is heavier, yet on track the front left would lock up first.
And the rear without me in it is LR=150.5 and RR 254.5 even though the fuel tank is on the left and everything else physically is equal.
I've owned it for 16 years and the shell is straight, I put a new set of racing logic coil overs on it years ago with hard springs. And it's stripped out, no interior.althought I've got my 17 inch road wheels on it not my 15 inch competition wheels on which would save 25kg.
Considering how it looks on the scales it drove well and I've cracked some class records, albeit with a bit of 4WD understeer.
What I was surprised by is the differences in the front, as the engine block is on the right (and me) and the left front is heavier, yet on track the front left would lock up first.
And the rear without me in it is LR=150.5 and RR 254.5 even though the fuel tank is on the left and everything else physically is equal.
As I said before, I weighed the car with the scales flat on my garage floor, then I checked and it dipped at the front by 10mm. Side to side was ok, measured it again after getting it spirit level correct .only minor differences noted. So, at this point in time im just messing about trying to get it al little more balanced.
The difference of 120kg between the rears is a little concerning.
There was a comment on here which seems to be removed about someone buying coil overs.setting them all the the same height and it was way off too, that is essentially what I did, the 10mm drop I did last was at angelsey at an event purely done to see what difference it made, I just wound them all down by 10mm, not by measuring cill or wheel arch height.
The difference of 120kg between the rears is a little concerning.
There was a comment on here which seems to be removed about someone buying coil overs.setting them all the the same height and it was way off too, that is essentially what I did, the 10mm drop I did last was at angelsey at an event purely done to see what difference it made, I just wound them all down by 10mm, not by measuring cill or wheel arch height.
I have a straight length of 4x4 long enough for front and back measurements, I understand what you getting at about being perfectly level, but this isn't an F1 set up, even + or - 5kg isn't a problem at this point.
I also know I'm not going to get 50/50 either way, once I've made some changes to the inside of the car over the winter I'll measure again and try to fine tune it a bit, hopefully by then with a bit more knowledge.
I also know I'm not going to get 50/50 either way, once I've made some changes to the inside of the car over the winter I'll measure again and try to fine tune it a bit, hopefully by then with a bit more knowledge.
I'm going outside now to have a go now, I'll measure and check spring heights before I change anything. Swap the plates left to right to see if they read the same. Write everything it down as I go along.
Someone explained to me it's like having a chair with some legs longer than the others.
Also, the car has so many changes to it there's no real guideline to go on
Someone explained to me it's like having a chair with some legs longer than the others.
Also, the car has so many changes to it there's no real guideline to go on
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.
Gassing Station | Suspension, Brakes & Tyres | Top of Page | What's New | My Stuff