Going to higher pressures in the rear is what I wanted to do last Sunday, unfortunately my air tank didn't have enough left after setting up the Z earlier in the day. Next event I think I'll start at the pressures you list above for the rear.
Years ago I autocrossed an Infinity G20 in ES and ran 38 front and 60 rear with good results. On bumpy courses I would have to reduce the rear pressures to stop some hopping that would occur.
Ultimately, when I can dial-in about 3/8" toe-out in front I'll be able to reduce the rear pressures to something a little more reasonable. BTW... is rear toe adjustable on the Contour? If so, whoopie!
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John Coffey
johncof@veriomail.com
