Advice on camber setting for track

[S650GT]

What corner was that and how the hell did you do that? 28 is not a low starting pressure.

Turn 4 in Sonoma. I messed up in my first lap there...

R10/R8 are fine on the street though a bit on the noise side I drove with mine all the time but actually switched to DSUno/OEM Rears and I'm happier my car has never stopped like this. And it's also very good on the street. SRF is great for the fluid but if you can switch to6 pistons brembo's.

For the 4 piston it work as well ? Wha would you recommend for the 4 poison ones?

Is that a summer tire? Perhaps a track tire would have stiffer sidewall.

I swap brake pads between street/track but I use the same rotors. I do not sand them. I never had a good result trying to sand off pad material. It doesn't budge for me.

I run Valvoline 75w140 diff fluid from Walmart, includes friction modifier in my Torsen diff. My exhaust is double heat wrapped around the diff area. I run DIY cooler. I used to turn on a battery powered Lowes shop fan, then back up to it (stopped by wheel chocks) until it was 2" off the diff. That worked fine. Once you exceed 260F diff temp, you should consider adding an active diff cooler. My steady state diff temp is now 230F regardless of session length. I certainly cannot tell what viscosity fluid is in the diff while driving. But I run 140wt simply for the elevated temp on track.

Thats a summer tire yes. So you just bed the brakes? I would assume bedding the r10/r8 will be more efficient than bedding the stock brakes when changing from track to street pads. A more abrasive pad will help remove old material depositions.
For the differential, unfortunately I don't have a cooler so can't know what temperatures I'm running at..My safe bet would be to have a better fluid to protect it as I plan to change it every 2-3 track events. Will the 140wt cause any issue at lower temperatures since it wont be that viscous ? less viscosity -> more resistance-> more wear? Are there any high performance 75W-80 oils? I feel like the 75W-140 will be ok for the track but for daily is well out the engineering specs

 

[TeeLew]

Turn 4 in Sonoma. I messed up in my first lap there...

So that's the FL tire? It looks like you cranked *a ton* of steering in the car and rolled the tire over, but I'm not sure how you could do that with relatively cold rubber and a 28 psi starting pressure. Honestly, I wouldn't read that much into it unless this is a common occurence.

Whether engine or driveline, the low viscocity oils that we're told to run by any OEM is to increase fuel economy, not improve performance or life. I highly recommend running thicker than recommended engine oil and there's no harm to putting a bit thicker oil in the rear end. It will be a little more stable thermally than the lighter stuff and we don't really care about the last 1/2 kph at the end of the straight or fuel economy.