Just wondering what tune and what gains some are getting using the predator. I get bad pinging with the performance and 91 tune, didn't seem to have much torque either.Due to the ping I don't know how it would have run upwards of 5000 rpm but till that point the stock tune would romp it. I guess I'll try the 87, are all the predator tunes supposed to be better than factory tune? I'm running 93 octane, all stock 05GT. I just tried 100 shot of nitrous with colder plugs and stock tune, no ping noticed at all like that.