If you upgrade the injectors with higher flowing units, you must change the software to match the injector size. With the higher flowing injectors + software, the rising rate FPR is unnecessary.
Someone also mentioned earlier that you could use a device to alter the HFM signal, "fooling" the ECU into thinking more airflow was present (like Split Second, Uni SMT6, Apexi AFC, etc). Although this may work for a while, once adaptation takes effect in the DME your fuel curve will change, and you''ll need to adjust it again. In the same way, if you just add larger injectors without upgrading the software, it *may* work under forced induction...for a while. Once the DME adapts over time and reduces the injector duty cycle, you'll start to run lean again.
In the end, it will be like a dog chasing it's own tail. To some, it is acceptable to fiddle with knobs on HFM controllers and clear adaptation every other week. I would rather do it the "right" way, like Ron Popeil says: Set it and forget it!
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