Try 22 LBS that worked for me.
If you have a decent compressor (not one of those super cheapo cigarette lighter ones) that does not take forever to fill a tire, you might consider "airing up" the front ones as well to the maximum pressure. Less rolling resistance......you'd be surprised every little bit helps. I bought this one from Harbor Freight it's a step up from the cheapos and works fairly quickly.
If you are at like 14.01 and trying to break into the 13's you could pull the air filter for a couple of runs, takes a a minute and might get you that 10th you are looking for.
Try not to show up with more than a 1/4 tank of gas, you don't need the extra weight.
Oh.....and fold your mirrors in!
Originally Posted by BDFX4
Last Friday I ran my truck in 2WD using the locker. I locked it in, did a short burnout, then staged the truck. I was only able to launch the truck at 1,800 rpm's, anything more and the truck starts blowin the tires off while still in the beams waiting for the tree to come down! Next time I go, i'm gonna air the rear tires down and see if I can get the truck to hold a higher launch and not blow the tire off thru the 60ft. I know there is a difference between how the locker functions between the 2011 and the 2012, may wanna look into that before you go out to the track!