There isn't much you can do in the way of fueling to be honest. You can try to add a 5th injector setup or maybe use larger injectors via the control of an Apexi SAFC.
However, for your aim of 180bhp its easy to get this with the standard fueling. Just be sure to check the timing and be observant for detonation. 180bhp is achievable at 12psi of boost.
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