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I just swapped a 98 JDM B-20B but I replaced the manifold and throttlebody w/ BLOX manifold (a lot bigger than stock even b-16) and my b-16 throttle body which was also bigger than than b-20 (it was about the size of a D-16Y7) anyways my stock injectors are 256cc I had them tested and my car has quirks and was wondering do I need bigger injectors than stocks? cause when I crank the pressure up the car just gets better but than I have to run the pressure at like 48-50psi w/ hose attached, and I know that's pushing the injectors harder.

I'm running a obd-1 ecu (p75) was wonder will bigger injectors work better like 310's or a AFC, car feels like it runs lean until I floor it.

Anybody had any experiences w/ similar motors I know that I have by replacing those parts I have put a LOT more air into that engine and I have to push the fuel system. Sorry this is so long this car is pissing me off with it's "little quirks"

 
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go with bigger injectors like 395cc injectors and a aem fuel regulator that is adj......

 
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ok so I had my car dynoed to get a idea of my air fuel and all that, and with every thing at stock (fuel pressure, timing and stock injectors) my car starts out running lean like 15.2 or so and then by the end of the pull it get's down to almost 12.6 so obviously the stock injectors are sufficient except for at lower rpms and off idle so would a AFC correct these problems.