Just tossing this into the mix and bringing a good thread TTT
I hadn't seen it mentioned yet, but you can take a lot of the guess work out of which corner to fiddle with by quickly deriving the calculated corner weights.
Works like this:
1) Bring the car to the correct ride height while being reasonable about the spring positions. ie. you're not drastically different on one corner vs the other. You can be off a lot and this method still work great.
2) Drive on to your scales and take the weights. Use your spread sheet to make this easier. Jot down your 4 corners. You know the total of each end and sides are Ks.
3) Do the math or enter the numbers in the spreadsheet. Figure out the total left side and the total right side. Let's say that total on the left is 1033 and on the right is 999 (total=2032) with driver of course.
(these are obviously "before" figures. Cross delta is 84lbs or about 4%)
4)Now figure out the percentage of the left side is to the total. In this case, 1033/2032=50.84%. You only really need to calculate the weight for one side. Take 827 (the total of the front) and multiply by the left side percentage, 50.84%, which equals 420lbs. That's the LF target weight. To get the right side, just subtract 420 from 827 and yet get 407 obviously. That's the RF target.
5) Do the same for the rear
Now you know where to go to add and subtract weight with your spring perches. I like this strategy because it takes a bit of the guess work out.
In the above case, I pretty much know where I need to go to fix the corner balance issue without throwing my ride height off into limbo land since I know what the finished product will look like. If I'm creeping up on the target weight and I still have a ways to go, then I best move to a different corner or my ride height is going to go funky. It's EASY and pretty quick. This is to attain a 50/50 cross balance. At that point, you can then tweak it for the track or whatever...
PS- It's nice to use a person when weighting the car. Makes a big difference in the weighting just moving feet, your head, etc.... At some point, it's just ridiculous. I'm not as anal as Andy is about this
After all weight in the car is dynamic. I've tried and tried and I can get sweet talk the fuel into staying in one place in the gas tank for anything! LOL