i was just wondering which is better im obviously its gonna be stoich but if you could ony do one or the other i think its rich, but im not sure.

also, with the 60mm tb you will go lean right? am i correct that in theory bigger injectors could just even that out or am i completely wrong?

 

Lean is 'faster' but more dangerous. Rich is safe but will make the car run more sluggish.

 

Actually the car will run just above and below stoich during normal cruising operation to allow for proper catalytic converter operation. If you ran at stoich the whole time you would actually defeat the cat. Lean burns HOT and Rich will burn cool. Both will cause power loss in extremes. If you check upon hard acceleration most power is not made at Stoich but at ~12.5:1 not 14.7:1. So for performance a little rich is good. Heck even at wide open thorttle most car actually go to open loop and go rich for the performance and to quench (cool) the cylinders after the accelration.

A bigger thottlebody if that is the restriction may cause you to go lean but the oxygen sensor will see that and then drive up your fuel supply by lengthening your injector pulse time. This will cause you to go back to equilibrium. Now if you have HI-FLOW intake exhause and good headwork done and flow too much air for your injector yes you would then need large rinjectors.

Now here is the other rinkle that people are getting into, since there is no mass air flow sensor they are checking Manifold pressure against throttle position for pressure changes to see if it corolates. That is the code that is coming up on the NGC. So hopefully you have some idea of what is going on. Better flowing heads, intaks, and exhaust may help return the system to normal pressure wise allowing the PCM to turn that damn light off.