996 C4S trackday tyre pressures?
Discussion
Hi all,
In a few weeks my C4S makes its long overdue track debut, and I was hoping for a bit of advise regarding tyre pressures. Every trackday I have been to has always featured an 'expert' telling me to up or lower tyre pressures from the manufacturer recommendations.
Dopes anybody know the truth on this? If there's anyone talking from their own experience of taking a C4S on track, then it would be great to hear from you too.
Cheers
In a few weeks my C4S makes its long overdue track debut, and I was hoping for a bit of advise regarding tyre pressures. Every trackday I have been to has always featured an 'expert' telling me to up or lower tyre pressures from the manufacturer recommendations.
Dopes anybody know the truth on this? If there's anyone talking from their own experience of taking a C4S on track, then it would be great to hear from you too.
Cheers
Last time I was on track with my last C4S I left the tyre pressures as the book and all felt good. No excessive tyre noise or wear and stuck like glue to the track. After leaving the track the tyres were back to normal surface pattern after 15 mile drive home. Oh and I did give her a right old spanking!
Paul
Paul
It is dependent on your tyres.
On Michelin PS2 and Supersports you need to aim for circa 36-38psi in the front HOT and 37-39psi in the rear HOT.
Note I say hot, so go out do a couple of laps and let air out of the tyres until the above is reached. Then go out and do more laps and when you come back in adjust down as necessary.
Make sure you have a pump with you as by the end of the day you will need to add 8-12psi all round otherwise you will drive home on massively under-inflated tyres which will damage them.
If your are stickier tyres like R888's, CUP's etc. then the HOT pressures are far lower as they have stiffer sidewalls, the range is normally 28-35psi for more track orientated tyres.
On Michelin PS2 and Supersports you need to aim for circa 36-38psi in the front HOT and 37-39psi in the rear HOT.
Note I say hot, so go out do a couple of laps and let air out of the tyres until the above is reached. Then go out and do more laps and when you come back in adjust down as necessary.
Make sure you have a pump with you as by the end of the day you will need to add 8-12psi all round otherwise you will drive home on massively under-inflated tyres which will damage them.
If your are stickier tyres like R888's, CUP's etc. then the HOT pressures are far lower as they have stiffer sidewalls, the range is normally 28-35psi for more track orientated tyres.
maxpaul said:
Last time I was on track with my last C4S I left the tyre pressures as the book and all felt good. No excessive tyre noise or wear and stuck like glue to the track. After leaving the track the tyres were back to normal surface pattern after 15 mile drive home. Oh and I did give her a right old spanking!
Paul
^^^ This ^^^Paul
Treat yourself to a good quality portable rapid tyre inflator, I have a Michelin one which runs from the 12v lighter socket and it is a great piece of kit at around £50. Take it with you to the track to monitor your pressures all day and reinflate them for the way home.
I use this for all our cars and haven`t visited a grubby petrol station air-line since!
I use this for all our cars and haven`t visited a grubby petrol station air-line since!
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