hey guys what i have the 19 inch carrera classics on my car and i just came back from streets of willow and i ran with out deflating my tires at all. "i guess i like to have a feel for the car that would be the same on both the street and track", anyways what are tire pressure are you guys running in los angeles weather?, and what tire pressures do you run if you guys happen to visit the track?
thanks guys

 

for 19" Pilot Sport PS2, 30 f and 37 r on the track, 34 f, 40 r on street.

 

and those should be hot temps...if you are driving the car on track at speed you will increase tire pressures 8-10 pds...these tires do not like pressures above 38 front and 40 rear and you won't like the resulting loss of grip either

 

yes on at speed pressures. Front can be 37 and rear can be 42-44 for normal driving.

 

what does porsche recommend for normal driving pressures? is it 37 front 44 rear cold? thanks

 

look at your door jam for the front and rear cold pressure. 37 and 44 respectively are what I have (if I'm not mistaken)

 

36 front 41 rear seems to be good.

 

PAG says 33/39 PSI for 997s w/ 19s. Why are people using more?!?

18s should use 36/44.

 

That's what I run..33/39..actually I believe the manual states higher, like 44psi for the rear. I found 44 rear way to high for the street. 5 more lbs. psi is like adding a 50lb/in stiffer rear spring. I found the ride on the street a little to extreme even in normal mode at this psi. Getting old..

 

If your starting cold in the early morning what would you set them at for track driving.?

 

I start out with them dropped (8 pounds cold track temps and 10 pounds hot track temps) under my desired "hot" pressures, which for me are 36-37f, 38-39r...take it a little easy first couple laps to build some heat and then it's time to go

 

Question for all of you....

Does anyone ever look in the owners manual to see what the recomended tire pressures are?

Hint...they are NOT 37 front/ 44 rear under normal loads...ie 2 people on board!

 

As quoted above, it should be 33/39 PSI for 997S with 19". It's the same both on the door jam and manuel!

 

What about HOT track pressure for 997s 19"/PS2????

 

Looking at my track notes back when I ran stock Michelin Pilot Sport 2's and was in the novice class I was heating up the tires about 6-8psi during a session. After I became solo my pressures would raise 10-12psi depending on weather/track conditions.

With PS2's you want to keep the front and rear around 38 psi...no more than 40 in the rear or you will loose grip. I always liked around 37 front and 38 rear. These are HOT pressures. I started out at around 29-31 cold depending on the weather and how hard I was driving at the time.

When I moved to R-Comps with the Toyou RA1's and then the Toyo R888's I always liked the grip when these tires where at 36 front 37 rear.