2GR-FSE was 11.8:1 says that article...I think they can beat that this time around. I'd guess approximately 12:1. More would be awesome
So that article seems to say that D-4S achieves very good fuel mixing and combustion efficiency compared to your typical fuel injector setup. Now the GR engines were rev limited pretty low as I remember, but someone said it's possible to get a crapton more power out of them. Does this require new cams though? I definitely remember looking up that motor, torque drops off towards its low redline, sounds like cams weren't that aggressive.