How did he test this? Did he test it at idle, cruise, drag strip, road course? I would think that a cold air intake with an intercooler would make a pretty big difference on a car that was driven on a road course over drawing air hot air right over the exhaust. The cylinder temps get a lot hotter on a road course. With the Cobra (supercharged non intercooled) I have to run on the pump gas tune with 110 octane to keep it from detonating. When I drag race it I can run the race gas tune with 100 octane and the timing bumped another 4 degrees and it doesn't detonate.
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