It's actually pretty damn simple.
The best possible way to lower a car would be this:
Cut stub axles off the spindles/uprights, move them up however much you want to lower the car, weld them back on. That's not a realistic approach because it will break, but it is accurate.
Every single piece out there sold for fixing roll center, bumpsteer, camber correction, etc etc would be useless if you could just buy drop spindles for every car. In the rear it's the same but you have to move the whole bearing assembly vertically in the upright. Which then leads to issues of clearance with the CV and axles to the control arms. That's why in many cases it is simpler to simply raise the subframe.
A simple rule of thumb for most cars is this: If the lowest arm (front or rear) is angled below level with the ground, then you should start thinking about adjusting your roll center. This means pretty much any slammed 240sx on anything bigger than 15's.
The best possible way to lower a car would be this:
Cut stub axles off the spindles/uprights, move them up however much you want to lower the car, weld them back on. That's not a realistic approach because it will break, but it is accurate.
Every single piece out there sold for fixing roll center, bumpsteer, camber correction, etc etc would be useless if you could just buy drop spindles for every car. In the rear it's the same but you have to move the whole bearing assembly vertically in the upright. Which then leads to issues of clearance with the CV and axles to the control arms. That's why in many cases it is simpler to simply raise the subframe.
A simple rule of thumb for most cars is this: If the lowest arm (front or rear) is angled below level with the ground, then you should start thinking about adjusting your roll center. This means pretty much any slammed 240sx on anything bigger than 15's.
