i currently am running my 99 civic si with a stock b16 t3t4 turbo 255 pump and dsm 450 injectors with an afc, now my question is can i get away with putting 550cc injectors in or am i going to have problems, the reason for getting new injectors is because i had the motor apart for rebuild and my friend bought them, any info will help thanx
Chris

 

you would need some way of leaning it out more from the original 450 setup. I am not familar with an afc so I don't know if they can handle 550's or not. You could put the 550's in there, but it would be super rich.

 

rc also offers a 440cc injector i wonder if that would work

 

i would think u can just lean out the fuel map on the vafc if you put in the 550's. if u can't. you'll just be running pig rich