When you say "cold" tire pressure you just mean the tires after resting for a considerable length of time and not actually a temperature correct? If I were to do this after driving to work in the morning, then wait a few hours and do the chalk test that would be fine too...
I ran those $hitty KO2 tires at 26 psi cold and found that to be the best overall psi for a flat contact patch.Just an update on my chalk test, my new lift, my zealous tire rotation & my tire wear.
1 - Like many others, I did the chalk test when I 1st got her. I was happy with how I dialed the PSI in, and I kept on a strict rotation regime. Each time I had the tires rotated (and balanced) I always asked the tech(s) how things looked, or I read the enclosed wear depth paperwork if included.
2 - After 2 years of wheeling at stock height with stock tires (still with lots of good tread left on them),
I just recently decided to add the Mopar 2" Diesel lift.
Of course, the dealership inflated the tires to an ungodly high PSI, but I decided to run them home like that. I experienced my 1st Death Wobble ever on that ride home. If I remember correctly, they had the tires at about 38 PSI.
After dialing my pressure back down (have not redone my chalk test yet), I scheduled another rotation/balance. ALL looked good on the tires again.
I have still run into the DW at the SAME pothole where it originally happened and one other time (again, when the tires were at a higher PSI after the rotation/balance).
I immediately lowered the PSI a bit lower than my norm as an experiment. For the rest of the trip when the 2nd instance occurred, I did not have an issue.
FAST-FORWARD to my recent trip to an independent garage where the folks have had experience driving and working on JP's for years. I was still trying to track down my DW issue. He stated that ALL was tight and in proper order underneath the front end (including the alignment). He did ask about my PSI, and I stated that I was running at about 25 cold up to 28 hot. He said the tires all looked good and agreed that a lower PSI (in my case) was appropriate.
At this PSI I haven't had the VIOLENT DW that many others have experienced BUT I am not currently attributing this to the PSI. I suspect that is just a coincidence. I will know for sure when I make the same trip when the 2nd instance occurred which I spoke of earlier.
Once I get some dry, warmer weather and get my half doors swapped back on, I will re-chalk to see how my lower PSI is looking.
Until then, I am swerving to miss that damn pothole
