There must be somewhere as depending on how brave you are 200 with aluminum heads seems to be the upper limit with pump gas but most seem to say 180 to 185 with pump gas and aluminum heads.
You TQ is also a factor as the higher the RPMs the less octane needed as air fuel mixture burns at a constant rate and things happen quicker at rpm.
So as an example a car with a 2500 stall loads at 2500 and may ping till 4500. put a 5000 stall in the same combo and it loads at 5000 beyond the detination as the piston gets over the top much quicker before air/fuel can expand enough to detonate/ pre ignight~!!!