Because with enough boost to make it worth while you will lift a head. Timing would be almost non existent, maybe 10*, the internal parts in his motor aren’t up to the task of boost…lets see…what else.
I agree with the more compression, less boost argument…but on a Gen III it’s not a good thing over 11:1…and 11:1 is pushing it.
Just to add…with the current tuning available on the GenIII stuff 12.5:1 N/A is tricky. We are learning every day and gaining access to more tables all the time but it’s still not close to being 100% control.