Can anyone who understands suspension geometry explain what affect going to a 1.5" forward a-arm would have, do you get any of the benefits of a slightly longer wheelbase (which typically rides better), as well as being able to run a 33" tire w/ chains (specific to my use I would guess. Lol)
Is there any negatives? Would it affect (Negatively or Positively?) the high speed handling of the car? <--- That is very important.
The first issue I could see would be the Tie-rod angles/ratio would be different . I would think it would have some effect on ackermann steering/bump steer.. I think all else would depend on the geometry that is built into the arms..
If the upper and lower control arms are oem length, and both ball joints are moved forward 1.5", then the caster and camber would remain the same.
The steering geometry would change, but without some analysis, I can't say if it would be better or worse.
The important thing is to maintain the oem wheel offset for best handling.