Agreed. Certain cars things just work, others don’t. My old dodge was tuned off the stock PCM fuel/timing maps, running a port fuel EIC 8 injector setup(4 primaries, 4 secondaries) and a MAP check valve(synapse engineering piece actually). Car thought it was at 0hg at WOT when actually running 26-28lbs boost, but I got away with it because the thing ran such f-ing retarded timing from the factory to begin with. Just kept throwing fuel and boost at it like a damn diesel until it stopped making power. “CIS” tuned style EFI :lol
Those that ran an AFC on the boosted 420a’s blew up, as it masked the PCM from TPS load readings and the car advanced timing thinking it was in a cruise situation(highway). Pop, pistons and rods want to say hello!