What tire pressure to set for non-RFT (Pirelli PZero) in a tropical environment?

[TurboHank]

Howdy guys,

I just got a new set of non-RFT tires, Pirelli P Zeros to be exact. The tires are on the 18 inch rims from M package (225/40/18 and 255/35/18). I understand the factory setting for the original OEM run flat tires are 36psi and 42 psi front and rear respectively for the US market (this is where i first had my car for about 9 months). So my questions are in two phases:

1. Now I am running non-RFT tires, should the tire pressure be higher or lower than the factory recommended settings?

2. I have shipped my car to Taiwan, a tropical country with summer temperature climbing well into the 90s, how should I adjust, scale down on the tire presure?

Thanks!

Hank

[jannisa]

The pzeros have a rather hard ''heel'' and it takes some time to warm them up.
29-30 psi on all corners is reported to optimize their efficiency, they will start gripping properly after 5 km and you will prevent building up excessive thermal pressure when driving hard.
If you hear them squeezing/fizzing a lot try 32-33.
You 'll hate them if you go up further.

[TurboHank]

Originally Posted by jannisa

The pzeros have a rather hard ''heel'' and it takes some time to warm them up.
29-30 psi on all corners is reported to optimize their efficiency, they will start gripping properly after 5 km and you will prevent building up excessive thermal pressure when driving hard.
If you hear them squeezing/fizzing a lot try 32-33.
You 'll hate them if you go up further.

Hey thanks for the reply. 32-33 is much lower than the recommended setting of 36 and 42 for the front and rear for the oem RFTs, is setting at 32-33 enough?

[jannisa]

Yep, the 2.6-3.1 bar is for rft only.