Would increasing the CFM be of any use without a fuel management prg? Would the general block design of the 4g94 make it fruitless to up the fuel flow? I know air flow doesn't do anything signifigant for it but upping the amount of air and fuel is my question. Any more experienced tuners help me out?

 

It would provide no benefits to fit a larger injector with a stock computer. Best ot fit a FPR unit with some sort of control of fuel supply for increased fuel supply but only after a number of mods like a throtlt ebody, air claner, extractors, exhaust.

David Thomas
www.rpw.com.au

 

Mitsiman is correct. You need to go beyond the mild mods like I/H/E or FPR, bodering in the moderate class as in cyl head work.

You should only replace your stock injectors from clogging due to high mileage or max-ing out the mild mods class.

Also, you need an AFC to tune them properly. Otherwise, your motor won't start due to too much fuel, gasoline droplets dumping out of the muffler, rough idle during braking (might stall at stop sign or red light), and extremely rich at WOT (possible . . . not sure stock FP will do it since I do have a 2g GSX FP . . . mine went extremely rich at WOT 1.085 O2 reading - bogging down).

 

Also, misfire can happen, because there isn't enough spark to ignite the fuel completely and fouling up the plugs in a hurry within 2 gas fills.