Higher tire pressure is often used to help prevent rolling the tire onto the side wall. Sidewall stiffness varies greatly between different tire models so what works for one tire model may not be the best for another.

idk wtf you were reading, but that sounds ***-backwards. Your tires will melt, that's just going to happen when you put extreme loads into the compound. you also run the risk of a blowout with higher pressures, not to mention poor handling characteristics.

I agree with the other statements to run lower pressure cold when starting, and check the hot pressure and adjust accordingly.

Tires blow out from being under inflated which puts more contact patch down and overheats the tires (that's why ca now has it mandatory for shops to set correct tire pressures, also the whole ford/Firestone issue was ford having a door sticker inflation of 29psi when the tires weren't meant to run under 32 or something like that). Also if you look at a MB tire placard there is two psi setting, one for under a certain speed (lower psi) and one for over a certain speed where it puts more load on the tires and it is a higher psi.

However after speaking with a tire shop that handles a lot of track duty you are correct that they want to start a little low and then monitor tire temp and inflation pressure change in this case.

I recently changed my RE11's to AD08R's, im never looking back!

Yea I've been dealing with a guy that sells tires and supports the local event group and he said those are a very good tire and are petroleum free so they don't get greasy however those are super low wear more in the re-71r class.

He didn't sound too enthusiastic about tracking with the s-04 and feels the pilot super sport will be my best option all the way up to low group c depending on how hard I push them and the track temp (so thunder hill is out). Still considering re-11 just wish they had the right rear size.

I assume you are looking at TireRack. You can always step into 285/35/19, it's a good fit to your 10 in rear rims, arguably better than 275.

Yea I'm sure they fit and I know the z can still spin a 285 my concern is how close the tire is for speedo reading, miles and also the stability control programming. I know when I worked for GM I could select tire/wheel sizes for the EBCM but I'm not sure how critical it is for Nissan. Wish I still knew a Nissan tech to see if the sport and Nismo run the same or different programming for the stability.

1010tires.com has a calculator that can give you the percentage change in wheel speed. the nismo uses 285/35/19 stock in the USA so I dont think it will be an issue.

For reference, i run a 275/35/18 on my rear axle and the speedo reads anywhere from 3-5mph faster than actual. Stability control is still functional with my setup (though it's never used on the track)

Going from a 275/35/19 tire to a 285/35/19 tire means that your speedometer is off by 0.67 mph at 65 mph. So essentially negligible :twocents:

Yea I did the calc last night and looks like just over a half in in dia, so only .25 radius. Looks like re-11 may become an option after all.

The only issue with pss is everyone is out of stock with no expected availability date. If you need new tires soon, it's easier to find other brands in stock