I also run the PR3/Shinko combo, about 5 or 5 sets now. I also have an after market TPS setup that also includes tire temp.
I've found that anywhere between 38 and 42 in the front raises tire temp about 20* or so in front and about 3-4 lbs tire pressure, more if hammering on the slab in full sun, especially on black top.
The rear is more difficult, to the point that I quit using the 4 lb rule. I think it's cuz it's bias, and bias seem to run warmer. I was getting about a 6-8lb increase, even after hiking the cold pressure to 450lbs. All this resulted in is ruining the rear sensor due to pressures rising well into the mid 50 range. JMO.
It is interesting to note the swing in cold tire pressure due to ambient temp. For approx every 6*F, the tire will gain/loose a pound. A forty degree swing in ambient will change the pressure by about 6*. Interesting when you consider living out west, it's pretty normal to have that swing on a daily basis, not even counting cold/warm fronts.
Anyhow, having said all that, I've settle on about 40 in front and 42 in back. I'm not sure how the new HD tire will deal with the same pressure.