Yeah I need something VERY basic (i.e. low cost).
I was looking at the engine and since its so small (the piston, the cylinder head, everything!) I don't know how much LAG there would be from just running it off the O2 sensor? I can't think that it would really be THAT much since the piston is so small?
Or maybe I could combine a really small jet (like in a carburated setup) to run parallel with the injector. That way, in extremely fast throttle openings, the engine will still run at a normal air/fuel ratio and not completely go lean...
??