Falken rt660's on 981 Cayman for HPDE Tire Pressures???

Anybody tracked (HPDE) the Falken 660's on a Cayman or mid engine car  with a similar weight ? 

What hot tire pressure would you recommend?  

Grassroots found 28 was the best on a Miata but the Cayman weighs a lot more. 

Thanks for the help!

Oem-ish sizes and a mostly unmodified car? Low 30s hot should be a good starting point. Probably around 26-28psi cold.

Sizes 255/35 and 275/35. Car heavily modified: suspension (PSS10's, -3.5 /-3  camber,  GT3 sway bars),  991 S engine with aggressive tune.

I haven't used those tires but have talked with folks who have. I would shoot for 33psi hot and then start taking temperatures. 

Maybe a bit less pressure front then, assuming wider wheels to support the wider tires.

In reply to jonboring :

Start with what is on the door sticker.  P cars want lower front pressure and higher rear. Too many tire shops don't do this correctly.  

Shoot for hot pressures of 32 front and 34 rear.  Adjust from there as needed.

For a "normal" stagger 2-3 psi extra in the rear is usually pretty good. With 255s front and only 275s on the rear it's probably more like 5psi. I'd say aim for 30/35 hot to start. That might be a bit on the high side but it's much easier to work down than up. That's assuming appropriately sized wheels, the narrower the wheels the higher the pressure they'll need.

FWIW: On my 987.2 I'm running -2.4F/-1.8R camber with 32.5 psi F/33 psi R with 245/275 Supercar 3s (non R). My temperatures have about 10 degrees of spread on each tire.

Just sharing some words from Andy Hollis on this very subject: