It will run fine without recoding other than you will notice the idle not quite 'clockwork' as they idle very steady when tuned right (ie cam to crank timing and bump stop clearances set nice)
I have tried this a few times when playing around (I have 10 injectors and tested all on motor)
So don't stress if it takes you a few months to get to it, the idle is the only time you will have any driver noticeable effect.
My nano wasn't showing anything out of the ordinary balance wise during actual on road use. Just on idle.

