9 PSI seems low to me, my 31x10.5 w hoosiers, wouldn't 60ft under 13 psi.


69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36