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675LT SP
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Discussion Starter #1
New on here so be gentle.
500 miles into a 675LT Sp after a 650.
loving to spark cut and the steering.
however, during a 50 mile blat was getting
These temps and pressures when Hot. Running new P Zeros.
The orange traction light on a lot even in three figure speeds when fully accelerating.
In sport/sport.
car was not moving around too much but felt progress was slightly restricted.
I know the sticky’s will be better but just wondering what I should be expecting?
Thanks
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get into that ESC dynamic mode.

Those tire pressures look pretty high. 41 psi hot is about to go sideways type pressure.
 
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Thanks,
Will try ESC dynamic and check the tyres when cold tomorrow.
it was a very warm 35 degrees Celsius this afternoon in England.
What are the optimum temps and pressures for p zeros.
 

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Thanks,
Will try ESC dynamic and check the tyres when cold tomorrow.
it was a very warm 35 degrees Celsius this afternoon in England.
What are the optimum temps and pressures for p zeros.
It's difficult to guide you through this without being in front of my car.

However, find the tires in the menu section of the car (google mclaren 675 owners manual if you need help to do this). Make sure that the menu is set for P zero tires. It's very rare for someone to have p zeros and not trofeos on a 675. If a non mclaren tech put the tires on the car then they would not know to change the tire settings. The tire settings need to match the tires you have on the car for the ESC to work correctly.

I'm more familiar with trofeos and corsas. On track; with 11 turns; the PSI will increase about 2 PSI per lap. If your cold tire pressures were 32 psi then you would have been doing some serious cornering, braking, etc., for the tire pressures to get to 41 psi in the rears. 41 psi is way, way too high. I've personally never decreased tire pressures for spirited street driving as you wouldn't be braking/cornering enough for the pressures to get as high as your car did.

I'd try to start them at 28 psi and monitor them while you are driving. I wouldn't go much past 36 psi without bleeding some air from the tires
 
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Discussion Starter #5
Understood and thanks.
Will check All that out tomorrow .
NB:The p zeros Tyres fitted by The McLaren main dealer, pretty good techs.
my car is > 3 years old 3000 miles. It’s original tyres Apparently had cracks in the tread blocks , hence the new tyres.
I was giving it plenty but not track intensity but it was damm Hot today.
 
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