My 987.2 Cayman S is needing an alignment, so I'd like to set it up better for autocross. I understand that I need to max out the front camber, but what about toe and rear camber?

 

On my 911 I run 0 toe front and got -1.1 deg. Out back -1.8 deg and about 1/8 toe in.

 

Its a very slippery slope!
Find a good shop that works on track cars and get a performance string alignment
Most generic alignment shops won't be able to really dial it in and get you the same settings side to side

I used to go that route ( generic), but once I got a proper performance alignment, I could feel the difference.
Well worth the extra cost

 

I second this, it's worth the money to get it correct.

 

1/16 total toe out front
1/16 total toe in rear
max camber front
1.9 camber rear

 

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With my 987.2 Boxster the most negative camber I was able to get at the front was 0.7 degree. The rear was not limited to the same degree.

 

There is no 1 setting that is perfect *always* and *everywhere*. On some tracks you need a friendly and compliant rear end to maximize the lap time in other places you want maximum rotation at almost any cost. You generally notice pretty quickly which end of the car is the limiting factor and it's not a huge job to change the sway settings on site.

 

As least camber is easy: max it out on all 4 corners!

I prefer neutral front toe and a little rear toe-in for my dual-use daily driver and autocross/track.

 

Haven't had my car aligned just yet but will probably start with this as a baseline and fine tune based on tire wear and temps. Will also be getting the car corner balanced on full stock suspension and ride height. This will be an aggressive track alignment

-3* camber front (will most likely be closer to 4 degrees if my suspicions are correct)
-2.5* camber rear

0 toe front
factory toe rear