991 GT3 Trackday Tyre Pressures.Advice please.

[oppolock]

Hello,

I've just bought a 991 GT3, to replace my 996 GT3. The old car was on 888R's, and I knew what pressures suited them (and my driving style!).

The new car is on Pilot Sport Cup 2's, and I'd appreciate some advice as to what pressures are ideal for
these tyres.

I'm off to Brands Hatch in the morning, to discover if I can learn to live with PDK.

Thanks!!

[5517]

MICHELIN Pilot Sport CUP 2 is a track tire (semi slick tire), which meets the legal requirements for use on the public highway.
This tire has been specifically optimized for use on a dry track. On a wet track or road, where there is a risk of aquaplaning, adapt your driving style by reducing your speed and leaving the safety and driver assistance systems connected

For track and road handling reasons, the fitting of a set of 4 MICHELIN Pilot Sport Cup 2 is strongly advised

Before Fast Circuit Use always
o Verify the condition of your tyres, checking for wear & damage
o Build up to the temperature of the tyres gradually by a few more moderate paced laps

After running on the circuit and before returning to the road, consider
• Always check the condition of your tyres to ensure they are safe and comply with relevant local traffic laws
• Allow the tyres to cool ideally before making appropriate pressure adjustments
• Re-adjust your cold tyre pressures in accordance with the pressure recommended by the car manufacture
• If they have been disconnected/switch off, re-instate all safety systems, driver aids and tyre pressure monitoring

INFLATION PRESSURE ADVICES

On the track for majority of car (*)
Cold tires
• Inflate the MICHELIN Pilot Sport Cup2 with a pressure between 1.7 bar (24 psi) and 1.8 bar (26 psi) front & rear
• Never allow the pressure to be below 1.5 bar (22 psi)

Hot tires
• The optimal operating pressure of the MICHELIN Pilot Sport Cup2 must be between 2.3 bar (33 psi) and 2.5 bar (36 psi) Front & Rear
• Never allow the tyres to run below 2,0 bar (29 psi) HOT

Road use
• Use the cold pressures recommended by the car manufacturer

• This information applies to the majority of cars regulalry used on circuits e.g: Audi R8, BMW M3 E90 / E46 / F80, Porsche GT3 / GT3 RS / 911 Carrera / Boxster/Cayman, Renault Megane RS, Subaru Impreza/WRX/BRZ

For all other cars and in particular for heavy cars or for any other specific information, please contact your local website www.michelin...

CAUTION !
• If not used for a prolonged period of time, remove the MICHELIN Pilot Sport Cup 2 tyres (mounted on their wheels) and reduce their pressure to half their normal value to store
• Store tyres in a clean, dry area, away from direct sunlight and above 0°C (32°F) in accordance with the information provided by Michelin in technical documentation or their website
• Do Not use, store or handle MICHELIN Pilot Sport Cup 2 tyres at ambient temperatures below -10°C (14°F)
• Under these conditions the tyre components can degrade, resulting in reduced performance, and at low temperatures can lead to cracks in the tyre compound and hence reduce potential in use
• Never use a tyre with cracks, breaks or damage to the sidewall or tread. If in any doubt please consult your local Michelin technical department
• When using for long periods in an intensive manner on circuits, please be aware that damage can occur to the tyre and its carcass from regularly running over the kerbs at the side of the circuit
• In the case of prolonged running over the kerbs (or also running heavily off the track) it is advisable to verify the internal condition of the tyre and it’s construction by demounting it from the wheel and having it professionally inspected for any damage, both on the interior and the exterior of the tyre
• It is advisable to visually check the tyres after each run, prior to going back onto the circuit

Edited by 5517 on Monday 27th July 11:45

[oppolock]

That's great.

Thanks very much for the post.

[mollytherocker]

It would be interesting to hear your thoughts about the car afterwards.

[red997]

+1 , having just got a 991 GT3, and looking to wring it's neck on a track very, very shortly....

[PorscheGT4]

brake, turn in, floor it, repeat :-)

[bigmowley]

use the TPM in race mode it's brilliant. On my car the front tyre pressures just went up and up and up on track. 3 times in 4 hours use we had to drop air out of the fronts. Once it had all cooled down on the way home we had a red light low tyre pressure warning light for low front tyre pressures until we pumped them up again!!! rears were fine.
good luck and enjoy its awesome.