Even Porsche has played around with caster on the 911's, starting with the early years set at 6.75 degrees, later revising the 69's with 6 degrees until 1989 when they changed caster to 4 1/2 with the 964's and then the 993's moved up to 5 degrees.
Maybe they reduced caster due to complaints of heavy steering?
Take your choice,
Joe
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