Bad Penny Camaro Performers Magazine Costa Mesa Goodguys Autocross 09

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Did you see the front tires lock at 0:59 while the back tires kept rolling along? This demonstrates how auto designers were forced to program the proportioning valve - not unlike the camber deflections a car's frontend exhibits in turns: Both equal UNDERSTEER. Solution? Either install an adjustable PV, or limit the travel of your stock PVs pin to about 1/4 of its travel. FINAL TEST: you'll know when your PV is balanced properly when all 4 tires lock as you hit the brakes on a gravel road