Originally posted by E30SPDFRK
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Keep in mind, that the lower control arm mounts to *both* the body and the subframe. Spacing the subframe alters the angle of the LCA, which can have an impact on any anti-dive built in to the chassis (it will increase anti-dive, in this case). It will have a 2nd-order effect on caster as well. With a lowered car, it will also further place the LCA in unfavorable, non-linear areas of the camber curve.
How much of this is relevant AT ALL to a street car is a matter of opinion, but none of it is directionally correct. However, if modifying the oil-pan is outside the scope of a particular project, it's probably not the end of the world.
-Bruce
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