Just noticed manufacturer recommendations for MPSC2 tire pressures:


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

So basically, start 24-26 cold and aim for 33-36 hot. That's consistent with my perception, when tires felt the best with 33 front 34 rear hot.

 

Here is the source: http://www.michelin.co.uk/tyres/mich...ot-sport-cup-2

 

Thanks Max. Very useful to know the recommended hot pressures, and also the minimum cold pressure of 22 psi.

I wish that Michelin would also comment on the heat cycle life of these tires. I only had time to go through two sets of these tires last summer, but they seemed to lose grip due to heat cycling after 6-8 days at 4 runs per day on the track for me. There was still about 50% tread left on the tires at that point.

 

Thanks Max!!

 

The old MPSC care and feeding guide had a lot of information. Anyone been able to find it for the MPSC2?

Things like add 6 to 10 psi in rain due to reduced temperature etc.

 

Max LTV

Great post helpful link Thanks much , as I had heard some advice not to drop the psi cold before

lapping at the track that the tires would "Chunk" and could suffer possible damage before coming up to ideal psi. This factory psi jives with previous Cup tire.

Deacon

 

I can confirm advice about not driving hard on cold low PSI tires. I once tried driving fast out of the gate because I had only 3 laps including the out lap to set time for time trial, and at 25 psi tires would just skip under any strong lateral Gs. I imagine if I did not back off they would have chunked for sure. So if starting cold, the first lap or at least a half for warm up with no high tire loads.

 

Has anyone tried using the competition mode of the TPMS sensor?

 

I use the "race mode" on the TMPS. It works fine but a bit fiddly to start with. Each time you start up teh car gives you a warning then reverts to the exclamation screen showing red negative numbers - you have to click through that sand tell it to accept the current pressures. Works fine once you have the hand of it.

I now have 10,000 km on the tyre including 3-4 track days and lots of fast road work and touring in 5 countries and three very distinct seasons (from Euro winter to NZ summer!).

I measured my tires up across te surface with a digital guage after the last track day. I feel they have been heat cycled out as I want getting the performance from them as I had done previously at that same track (3 trackdays, 7 months before). It looks like I have around 50% of the treat left (30% if you include the tread wear bars which set the legal limit here). They wear very well indeed, and will probably be fine for a few thousand road Kms but they have definitely given their best and have fallen off for any track work. Not bad though.