Not many cars are designed with 2 deg static neg camber,so you are too far off standard geometry for sensitive straight line feel,the desired alignment between inner lower control arm bushes and the inner tie rod ball joints[ as a straight line],which stops bump steer,may be not quite right.If you run toe out like many racers this won't help either. The Ackerman angle requires a straight line between centre of rear axle,outer rod end balljoint and lower steering pivot point.Hard to measure at home but easy to stuff up.Go too far from standard and the car doesn"t know which front wheel to follow.Better to run less camber,more caster and a smidgin of toe in.
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