FMU Quest???
#2
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I may be wrong here, but instead of messing with the FMU, why not go with a Boost Refrenced Fuel Pressure Regulator? A boost refrenced FPR should do the same job as the FMU, but it will bolt right where your stock FPR is.
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Your main issue with going to bigger injectors will be tuning. With a boost refrenced FPR for every # of boost you make it raises your fuel PSI by a #. Same principal as the Vortech FMU, but it gives you more headroom for future mods.