Running rich at start up has ZERO to do with any turbo/condition/size/…
And BTW just ploping in bigger injectors on that stock ecu wont do shit for fueling a different sized turbo. Fact. stock turbo MAF sees around 240grams of air flow under boost. My old k04-022 saw 310+, my 3076R, dont know since I am mafless, but I bet that would suck well over 600grams if it had a maf. The ecu will flip out and not know what to do with that much air flow in the maf, infact it will throw a code for it. Also your poor ecu only adapts out +/-25% fueling. so in order to “watch your wide band” and add fuel pressure, to richen it up under boost, enough to have the ecu have a fighting chance of not pegging block 31 @ +25% the pressure would be so high, it wouldnt idle!
K04-022, 26lbs of boost tuned properly, peeled the tires in 2nd. There are guys with that turbo, running high boost, WM and making close to 300ftq, which is stock rod bending power in these motors. They are no slouch. Infact they are MUCH more drivable than an on/off switch 30R is.