Beyond 20,000 RPM!
That was why bro. lsm and me talking about snails/siput......lolsigh..
this is what I was talking about. Study la bro. My 4G15 only had a cam pulley. Didn't use any ECU other than standard ECU. But that's because the overlap or lift is too much for the ecu to balance out. You'll need the piggyback or a standalone to manage the idling. But with a mild cam you don't have too much to worry about. And you don't need to upgrade your injectors la, you're not going full on high cams.
Seriously find another mech/tuner if this is what this guy is saying....
But again - back to my earlier question - why do you need the cam la? It doesn't do much if your engine is this stock. Maybe a small power gain here and there but SOHC just basically means you move the powerband around a little, not so much have massive gains. You want massive go for turbo