Aren't the JDM H22A pistons hyperecutic (high-pressure cast metal)?

If so, and you're adamant about running a 100-shot at 11:1, I would invest in forged rods and pistons. They will be much more resistant to detonation than an OEM cast piston.

Also, at that size shot, I would consider a direct-port nitrous setup or a much smaller dry shot if you go with the JDM BB6 pistons.

I popped an otherwise robust 2.0 16v MkII Golf motor by running a wet-fogger 75 shot with less than 10:1 CR. All it took was about 4 seconds of detonation [which I couldn't hear at speed] and the motor was done for. Holed pistons, burnt valves, the works.. it was ugly. h: