mine does around 8>10L per 100km off boost (ie light foot with 2500>3500rpm shift)
but boosting (heavy foot + 7000rpm shifts) does easy 14>18 per 100km
thats a ae92 4agze with fmic, 175mm nevo pully, camry box + k&n panel filter, 2.25 exhaust to cat + dog to 2" muffler....
did have a 4" muffler but was way to loud...