Pirelli PZero Slicks - Pressures

[Roadhouse]

Any idea what kind of HOT pressures you end up with Logan?

Unfortunately, no. I just kind of arrived at 27 through feel and trial/error. I've never checked hot pressures....

 

[ArizonaBOSS]

Good deal thanks. So is that higher than you ran the R6s? I typically start around 31-32 COLD on R6s to end up in the low 40s.

I always ran my R6s low, like 24-25 as well, was looking for 32 hot max. In the recommended ranges for R6 (high 30s hot) the grip would fall off towards the end of a session.

R7s have a softer sidewall so they need the increased pressures.

 

[blacksheep-1]

I always start 27 cold all around for my Pirellis. Set them first thing in the morning before the sun is up and then I don't touch them the rest of the day.

check out the advanced tire thread, I think it would help you.
First you need to know what "cold" is, then achieve the desired "hot" temps,(do whatever you have to do in order to get them to work) let them go back to "cold" and you now have a set of pressures to use at that particular (and similar) tracks....ASSUMING you start at the same "cold" pressure the next time you go out. If it is more than 5 degrees lower or higher, you will need to adjust the starting pressures to compensate for that.

FWIW I would take those Pirelli recommendations with a serious grain of salt......

 

[Roadhouse]

Thanks. I will take a look! I try to keep things simple and avoid over-analyzing where I can, but it probably wouldn't hurt me to dig a little deeper into the realm of tire pressures...

 

[Wingrider]

Also asked in the Forgestar thread but pulled it over here to ask about DHs.

Anybody running 315's in 645/660 or 680 up front on 10.5 or 11" wheels?

 

[blacksheep-1]

I think that's the PWC combination we run, 660s up front 680 in the rear.

 

[blacksheep-1]

I srsly can't give you a "cold" tire pressure, you need to find what the optimum hot pressure is for your car and back it down