That's not exactly the case. I can make no more power at 10.5:1 than 11.5:1 with more timing in most of the map.
I go back to my point I was making earlier though. A 500HP 2ZZ does not make a whole lot of sense if you are running a C-series transaxle. Seriously, look at what the power to weight would be (if the transaxle didn't explode). That is an insane car. Trust me. IMO it is not worth building the 2ZZ for that kind of power.
Cayman GTS 4.0 = 0.123
FAT Spyder 2200lbs @ 500 HP = 0.23
Huracan = 0.188