I run 14-15psi in my Nitto's. Gotta get them HOT...very hot to stick. Mine actually hooked better with them almost shot, they look like slicks almost now. They are awesome on the street, I barely spin in 2nd normally where as with a regualr tire I'd be spinning in 3rd gear easy. My best 60ft was a 1.90 and I also got a 1.91 . All my other were in the 2.0-2.1 range mostly. You have to slip it a little at 1st then nail it when they have grabbed. I got a 2.27 60ft with stock 185/14's on my old 89 Probe!! Alot is in the driver. They are not even close to slicks though.