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1993 964 Alignment with 17" wheels

Suspension and Steering

Vehicle Information: Model: 964; Year: 1993; Body Type: Cabriolet; Total Mileage: 60000;

My 964 suspension looked like it had a lot of adjustment available for lowering (about 1") so I took it to a local shop to adjust the suspension down and have the car realigned. At the same time I had them balance and install 17" wheels from a 996 (17x7 ET55, 17x9 ET55) with new rubber. The car is now lower by about an inch. Based on the car''s history I believe the suspension was stock but I''m not the first owner so I don''''t know that for sure.Before these modifications the car tracked very well, but now there is a lot of bump steer and the car won''t go straight on its own for more than 10 seconds before drifting. It also feels twitchy with any kind of steering adjustments and a little jittery at speed. The mech who did the alignment claims that after he lowered the car he couldn''t put the alignment back to spec so he did the best he could and gave the car back (without telling me the car was not aligned until I complained). I''m wondering if there is any way that he''s right about the car being unalignable with just an inch of lowering from US stock height on stock suspension, and whether the 3mm offset on the front wheels from the recommended 52mm could have this kind of effect.I don''t know for sure if the car was corner-balanced. The mech said he balanced the car with the wheels on the ground, but I''m not sure if I should believe that either.Thanks!

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