understandably its a 2.5, they are grenades waiting to happen, but i'd be taking it at least to 1.3 bar, and raising the AFR across the range from 4000rpm upwards to around 11.7/11.8, drive a bit more timing in between 3500 and 4500 you'll hit more torque on the peak and make more hp toward the end of your rev-range, on a fairly stock setup i'd usually expect to see torque and horsepower peak within 1000 rpm of each other.

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