Originally Posted by
ufoDziner
I agree with your points. To answer you question though, it gives a known and measured reference point. I personally test various sets of springs so that I know which groups are balanced. That way if I need to stiffen up the entire car, I know which group will provide similar balance to what I had (which may be a purposefully unbalanced setup). Then I can determine which logical set to change when working on a setup.
That makes sense, a great tuning and testing tool to ADD to your arsenal, not a replacement.
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I would use scales to see how much pressure it requires to bottom the car out at each end, or wheel, as well.
The video would mostly show the oil(damping) to spring relationship.
This combination would give you pressure(lbs/kg's) reference(scales), as well as damping(video) for given pressure.
Keeping in mind of course that wheel scrub has to be left unchanged for each testing session. Since it greatly effects testing without the wheels rolling.