Just curious what you guys use for tire pressures on BFG R1's. I just bought my first set of brand new slicks, and guessing at a 85 degree day ambient for this weekend's NASA event. I've been doing a lot of reading on line about it, but at this point I'm simply confused.

Hot sounds like 34 PSI?

Running 265/35 18's

 

Just curious what you guys use for tire pressures on BFG R1's. I just bought my first set of brand new slicks, and guessing at a 85 degree day ambient for this weekend's NASA event. I've been doing a lot of reading on line about it, but at this point I'm simply confused.

Hot sounds like 34 PSI all the way around??

Running 265/35 18's
Running -3 camber front, -2 rear 0 toe for both.

 

I've yet to run mine either, but i've been hearing and been told 38 hot.

 

28 cold 34-36 hot works best for me.

 

You can download a spec sheet from BFG with guidelines.

 

I was at an event on Monday with brand spanking new 255/40/17 R1S tires.... The weather wasn't the best with a top temp of 55* but I decided to run them anyway.

I ran the fronts at 40 psi hot and they stuck like glue with excellent wear. The rears I dropped down to 37 psi but couldn't get enough heat in to them so the car was very tail happy. I don't like to run tires lower than 35psi.

Not sure if that is helpful or not.

 

Guess I should mention my specs:
Evo X GSR
265 R1's on 18 x 9.5s
-2.8f -1.8r Perrin rear sway set in middle
Lowered on KW V3's

Last track day temps were around 65 deg and the tires have about 14 heat cycles on them.
28 cold 34-36 hot even tire pressure front and back works well with current suspension set up. Also, I'm only putting down 330hp/300tq.

 

MRufo, I've got X GSR as well, same size tires/rims. I found the weight of the X requires much higher pressures. I run 40psi front and 39 rear, any less that 38 in the rear the tires would roll-over.

I'm still unsure if I like these tires, they wear well but I can't seem to get enough heat into the rears to make them work in my X. In my setup they seem to have a very narrow margin where they work well...I'm trying some toe out on the rear to hopefully stop rear-end sliding (get mid-corner oversteer on low speed corners which I've been unable to tune out through the suspension).