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They were supposedly using the pfadt sheet I took with me. Pretty sure the first guy took the negative toe as toe out though. That could account for the terrible handling I had at first. Now, it's just above 50 where I seem to get a little drift and it kind of "jumps" when I change lanes, and it tracks road grooves.
Interestingly, the sheet I had from pfadt showed a range. It was the "street/performance" one from their website. I remember the toe range being 0 to -1/16. Never have seen the sheet without a range. I think I have toe-in on all wheels right now, and looks like 0 is the preferred one. Can't remember the other specs and how they compare.
Pfadt seems to be the only people around who use a minus sign to indicate toe-IN. I think they finally put an explanation note on the page.
I think I got my problem fixed. Took it to the Chevy dealer and they did an alignment and did what appears to be a really good job. It's steady as a rock now, as it should be. I was beginning to think there was something wrong with the two new tires.
According to the spec sheet I got, the toe is now set very near to 0 degrees.
just for info another great place in ATL is Grand Turismo East....they had four vettes there when I took my 13 GS to them...took time to discuss my driving style...(mostly highway with occasional spirited mountain runs)...then had me set in the car while they did the alignment....here is a link.... http://www.granturismoeast.com/
I have an appointment with those guys from another recommendation. What's the benefit of you sitting in the while they align it?