i run at 50 psi, but the again, max for me 65. for my truck, recommended pressure on stock tires is 35, but thats half the pressure of my new ones (which are also larger). i think the rating on your vehicle is more of a guideline than anything. the car is designed with that pressure in mind, but you can change it as long as youre willing to deal with the changed driving characteristics. correct me if im wrong.
that is an interesting question though, i never though of that. i dont think increasing the pressure to that will ruin youre tires or anything, too high and they wont wear correctly though (same thing if theyre too low).
by increasing the pressure, you lessen the contact patch, but the increased weight in the front might even that out. in a truck like mine its a noticable difference. you can see the difference in the front and rear sidewalls. i wonder what the weight distribution in my truck is.
try it, see what happens. although i dont think you will see much difference with just a 2 psi increase, id go with 5 psi at least.