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Regarding Tail Happiness of the GXP... I'd prefer this over understeer. But yes, check alignment, tire pressures, etc.
The guys in the E36 M3 BMW world swap the stock staggered tire config (225/245) for a symmetrical config (235/235) to reduce understeer. If oversteer is really a problem on the TurboSol, one can do the reverse and add staggered tires. But typically, manufacturers shoot for a nice, safe, benign understeer.
And on factory alignments... sure, I wouldn't be surprised if they have the fastest and most expensive aligning system known to man... but remember, they're GM. They'll have someone slap the car onto the rack and knock out an alignment somewhere within specs in the quickest time possible. Quality is determined by tools and technique... the latter being the bigger factor.
I'd love to see a compilation of factory alignment specs. I bet they're all over the place. Maybe I'll take mine in before I install springs just to see where the factory put it.
Russ
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Speed Is Life
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