Originally posted by Cairn
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You don't want to go much lower as your E30's front suspension geometry will get all jacked. You want to keep your control arms and tie rod geometry below parallel in relation to the ground.
For example, when looking at right/passenger side control arm geometry from the front, they should move from 8 to 9 o'clock so they go up and out in arc and strut camber stays negative, not 9 to 10 o'clock'--which would be present on an even lower E30--so they go up and in in arc and induce positive camber as the suspension compresses (I'm only discussing strut camber angle, not tire camber which of course stays and increases in negativity as the suspension compresses at any strut angle).
To be sure, the Ground Control tie rods that help prevent "bump steer" on lowered E30 (with E36 inner tie rods)/E36s (i.e. geometry) is simply a 3/4" or 19mm spacer on the outer tie rod that drops its downwards/towards ground, to keep tie rod geometry angle below parallel to the ground.
This is the "Track and Auto-X" sub-forum where generally "form follows function" where parts are required to properly function (as normally, if class rules allow, one would remove nonessential and/or non-functioning items for weight purposes). If you're looking for "aesthetics" like a "hella flush" super- dropped E30 merely for looks, I suggest the "Apperance and Cosmetic" subforum where many times "function follows form."
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