Just a heads up, if you have CHTs for each cylinder and the aircraft is new there wouldn't be any harm in attempting LOP operations and seeing the results. If the result is fairly even temperatures than your fine to operate LOP, as the third article explains the issue isn't running too lean, it is certain cylinders operating too rich and thus hotter than the pilot wishes. As long as you have the capability to monitor this you are fine, GAMI injectors are simply more precise and thus most likely to be able to operate LOP, but not a necessity. New injectors are much more precise than the injectors of 15 years ago when GAMI made its debut. Welcome to marketing lol.

Also LOP actually improves your engine life and each individual engine part, specifically the cylinders because it runs cooler CHTs than ROP. Unless you go to about 100 ROP as the original article I posted mentioned and the second article on post #2 with the graph confirmed your CHTs will be hotter. EGTs are simply put, a horrible system for monitoring internal engine temperatures.


Edit for detail: My apologies for the confusion first post, I was running on fumes when I wrote that and made it sound as though GAMIs are a must for this to work. In that third article it says, "have matched fuel injection nozzles" which any new system will posses. Furthermore, "I’ve had [oil-] fouled spark plugs, clogged fuel injectors, and magneto problems. But I’ve never had any engine problems associated with lean-of-peak." This gentlemen was not claiming, that I could see, to be using GAMIs.