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I use one on my built motor 700rwhp turbo E36M3 to make sure I am safely getting enough fuel from my DW300 pump when feeding 60 lb injectors at 51 psi base pressure and running up to 25 psi boost, but that car has a conventional fuel system.
The E90M3 has a fuel pump module regulating voltage to the pump to adjust flow. I think the module will conflict with the voltage booster. Look into what Drew did on his VT700 kit — others with big power have converted as well. I cannot recall the details but you can search. I think they convert to a conventional fuel system.
But beware as others have cautioned that around the same time you need more fuel if running 93 pump you also need stronger rods and lower compression. If running less efficient (but higher octane) E85, the point at which you deliver less fuel is reached earlier.
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