vanya.dx

not for track at all

P.S. what was max temp at front tires?

RY_THE_AMG_GUY

2.6 max

Nardoswiss

The stock recommended pressure on 19 inch is 39 psi cold. which is 2.7 bar. How do you come up with 2.0?

RY_THE_AMG_GUY

The car was sliding all over the place so figured the tires were too hot at 39 psi. Plus there seems to be some miscommunication as to what the car manufacturers recommend and what the tire manufacturers recommend. Keep in mind that the car manufacturers are recommending a specific psi for street driving which is completely different when tracked.

AhEmGee

When driving on track you nee much lower static pressures before starting the session, as the tyre temp will increase a lot, thereby increasing air pressure within the tyre further.
If you start with stock pressures they will get way too high during Track use, comprising grip, handling and the sidewall etc

Race cars will usually have a static pressure of 20-25 PSI at the start.

RY_THE_AMG_GUY

Agreed. However you can't run that low PSI in the stock run flats ContiSportContact 5 that come on the car.

AhEmGee

Mine has 19" RF with Pirelli P Zeros.( in the UK)

RY_THE_AMG_GUY

Better tires however it seems the RF can't take the abuse under heavy breaking and cornering.

Ryansanders212

Michelin Pilots sport 4s are by the far the best tires on this car.