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Originally Posted by TriGem2k
Jim, any thoughts?
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Hi,
AHA...! Different suspensions... ! My
Guess is that there's a problem with your
Ackerman Angle or your
Scrub Radius. I know I sound like a Broken Record on this, but if your car's alignment is set to Factory Specs they very probably no longer apply.
Unfortunately, I do not have a clue as to what the correct specs may be. But, once you go away from the Factory set-up, you also go away from Factory Specs. The AfterMarket Companies don't offer substitute specs for their set-ups, which is unfortunate ( I mean Geometry
is an
exact Science and you can't just ignore it). I don't want to
Harp on you or
Single you out, but this is the issue I have been speaking about -
Major Kudos to you for being astute enough to realize the problem - many wouldn't have.
My strongest suspicion is that your Scrub Radius has been messed up and your Tires are essentially fighting each other, causing the Shimmy. I mean you have already eliminated the Wheel/Tire combination.
All is not Lost however. Depending upon how
Anal you want to be in solving this, I would go to an Alignment Shop specializing in Race Set-ups and let them have at it on an Alignment Rack. I suspect the proper Tie Rod and Toe Adjustment will at least better, if not eliminate, the issue. It could even be a Steering Rack, or Tire Pressure adjustment.
But, I also have a haunting feeling that the bushings may be involved. Since there isn't any alternative there (that I know of), a total solution may not be in the Cards.
But, again, depending on how
Anal you want to be, there are a plethora of Bushings out there and one may work, even if it's for another application ( Ironically, probably a Yugo...
) - hope you have a Micrometer and Caliper, if not, you can borrow mine. Best of Luck...
Happy Motoring!... Jim'99