Join Date: Jan 2002
Location: Western Massachusetts
I found the best way to get your ideal air pressure is to load up the jeep with everything you would normally carry when on the pavement.(commuting etc.) Take a crayon or piece of chalk and color a thick line across the tread on atleast one front tire and one rear if not all four,(the front vs. rear pressure will be different due to the weight of the engine) now drive down a paved road for say 100' or so,just enough for the chalk line to start wearing out, Notice where it wears the most, in the center or the sides, if it wears in the center let some air pressure out until that line wears evenly. If it wears off the sides you need to add more pressure until it wears evenly.
You will probably want to drop the pressure considerably depending on the degree of wheeling you do. There are too many variables to be able to take numbers off the chart. like the type of vehicle, sidewall stiffness of different tires,and gear that you carry, winches etc.
I am running about 24psi in the rear and 26 in the front with my 33" goodyear mtr's, 8 cyl and glass body.
hope this helps.
1982 cj7. Frame off. shell valley kevlar body, stainless hinges, Bestop seats and supertop, KC titanium lights, Homemade swing out tire carrier with spare front wheel bearings/hub, Built 304,DUI,Edelbrock shorty headers with dual stainless 21/2 tubes into incynerator cans 21/4 dumped out the back,Edelbrock 600cfm, performer intake and cam, Borgeson lower column, Centerforce clutch, NV-4500, Dana 300 w/custom built twin stick, Homade 1/4" steel skid plate, 2.5 soft ride w/ 1" shackle lift, 33x12.5 mtr's. Stainless fuel and brake lines, Braided hoses. more...