Advice from track day peeps please

[Mike R]

These are the front tyres:


Details:
E92 M3, stripped to 1460kg, KW Clubsport, 3.5° negative camber and parallel toe, APs all round, 10" x 18" square set up running 285s all round.

Views?

[trackm3]

What pressure were these Hot ?

[Mike R]

32psi .

[mattCSLnut]

Originally Posted by Mike R

These are the front tyres:
Details:
E92 M3, stripped to 1460kg, KW Clubsport, 3.5° negative camber and parallel toe, APs all round, 10" x 18" square set up running 285s all round.

Views?

What's the load rating on these 285 section CUPs Mike ? and how does it compare to the recommended E92 figures ?
From the pic it appears the E92 M3 is leaning on these CUPs a tad more than the CSL would despite the recent diet.
FYI Track temperatures for Mich. CUPs should be around 26 (psi) cold.

[Mike R]

Originally Posted by mattCSLnut

What's the load rating on these 285 section CUPs Mike ? and how does it compare to the recommended E92 figures ?
From the pic it appears the E92 M3 is leaning on these CUPs a tad more than the CSL would despite the recent diet.
FYI Track temperatures for Mich. CUPs should be around 26 (psi) cold.

Will find out the load rating . Yep, told him the same thing - he started at 28psi cold, so wasn't sure if it needed more camber or if the 2 psi would make that much difference.

Forgot to say that these are the 3-way Clubsports designed and fitted to the GTS . Started off with everything set mid-way (as per KW recommendations), but car was a bit skittish over any bumps / curbs. In the end it felt more settled with the low speed compression at fully hard out of the 6 settings, and the high speed set to 5 clicks up from softest (of 15) and rebound was left at the mid-way setting of 9 (of 18 ).

[shimmy]

Looks ok. Maybe slightly to high pressure. Cold pick up of rubber typical this time of year.

[Chappers]

What are your exact concerns Mike?

[Mike R]

The camera doesn't pick it up very well, but the outside edge of the tyre is blue, looking like it has been working harder than the rest of the tyre. We will be doing some tyre temp measuring (outside, middle and inside) to see if any area of the tyre is working harder, but was just wondering if anyone had seen similar and resolved it by a) adjusting camber further b) changing pressures c) Something else?

However, it could just be that the rubber picked up on the cool down lap has made it look worse than it is.....

[billyboysm3]

I ran mine at -3.2 and seemed to get even wear up the front.

Depending on the day sometimes they worked better at 30psi hot.

I always left the house with them on about 25/26 psi.

The rubber pick up might make it look worse than it is.

285's all round, I bet the turn in is great

[Chappers]

Looking at the tread, there's very little been taken off the tread edges and no blistering, they're sticky tyres but I couldn't tell you why the rubber pick up seems to be on the middle and nowhere else, perhaps you weren't cornering as hard on the in-lap and those parts didn't get as much contact with the ground?

I take it the car felt ok? 285 all round sounds mad though.