Originally Posted by
CWA
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Some constructive notes:
The theory implies that more front bar/springs than rear gives more understeer. The theory more specifically says that a lateral load transfer distribution is what adjusts your balance. Lots of practical issues can interfere here, so that adjusting springs and bar do not actually change your LLTD as you might expect. These practical issues can be extremely significant, to the point you may not believe. Understanding what the theory should tell you is one thing, but don't be blind to what you are actually seeing, even if it disagrees with your current level of understanding of the theory.
As many have already stated, compliance if a practical consideration that can make basic spring/bar LLTD predictions redundant. If your chassis is too soft, stiffening front springs / bars won't actually adjust your lateral load transfer distribution. Have you verified that adding lots of front spring and front bar actually gives your car excessive terminal understeer? Try it. If it doesn't, your chassis is too soft, and all those LLTD predictions you are taking from Milliken equations under the assumption that your chassis is rigid are meaningless and far from the truth.