The Nitto NT01s seem pretty popular so I was wondering what hot pressures the rest of were running for track use.

I presently run mine at 39 lb hot.

Thanks.

 

I haven't used NT01s since 2010 but looking back thru my notes it looks like I usually set them a little lower than that, somewhere around 36-37 F, 34 R. For me, determining optimal pressures is more guess work and feel than any thing, I'm not very systematic about it. I tend to just start at a level someone has recommended and then maybe adjust a bit based on feel. The trouble is getting accurate pressures is hard. Ideally you'd do a couple really hard laps and then come quickly into the hot pits and have someone take the pressures and temps. In my case, by the time a session ends, I've done a cool down lap and am back in my stall its a little late to be getting accurate hot pressures.

 

Last year I ran my OE PZeros at 42/41 F/R hot. This was 255/40s on 9" rims. I got a lot of bad sidewall wear, which I could show you if I could figure out how to attach pictures! To me, this points to my pressures being a bit too low if anything. Of course, this kind of wear will be affected pretty strongly by the tire construction, and rim support. Nittos are more of a hard core track tire, so probably better than mine. I know you run 275/35s on 9.5" rims, so our tires are supported similarly by the rims.

My first track session of this year was on Goodyear F1s, 285/35 and 255/40, on 9.5" rims. It was at TMP, and I ran 44 hot front and back. Cold pressures were about 35/35. It felt pretty good, and the tires seemed to be wearing evenly across their whole surface. I'm going to try higher pressures at other tracks and see how it feels.

 

I've run 39 to as high as 41 hot. That seems to be the sweet spot.