Been a while since my college daze, but I believe that it went something like this...
C2H4 + O2 + N2 = CO2 + H20 + N2 + energy
where c2h4 is gas (not really, I don't remeber the chemical call out)
O2 is oxygen
N2 is nitrogen
co2 is carbon dioxide
h20 is water...
and those are the major players in the combustion process happening in your engine. notice N2 just piggybacks it's way through. It also absorbs energy, and keeps your engine from melting into a puddle on the garage floor.
So the reason you don't want to just through on 720 injectors in your automatic SOHC engine and go chase down a MC claren F1 is because you will add way more c2h4 to the eqaution then you have o2 to react with it.
(50)c2h4 + (5)o2 + (10)n2 = (3)co2 + (4)h20 + (8)n2 + (2)cn ()c + (50)h2 + (10)c2h4 + energy
not balanced, as I don't want to think that hard right now, but you get the picture. still the same amount of stuff reacted, but more stuff piggybacked throw, or change chemically, which robbed your power. this is also why the exhaust pipes on my car are black as hell. extra carbon and other stuff coating the muffler tip. Catalytic converters are made to re-burn the rest of the "extra stuff" that piggyback it's way through, because hippies would have you believe that the world is going to hell in a hand basket, and Carbon monoxide is BAD!!!!One one one111!!
The other way:
(10)c2h4 + (100)o2 + (200)n2 = (20)co2 + (20)h20 + (30)o2 + (?lots?)n2 +(10)n02 + energy
which is extra air molecules for every gas molecule. This results in a lean condition. This is also bad, as again you get extra stuff on the second side of the equation. this robs power, which you don't have much of already because of the lack of power out from the chemical bonds in gas breaking.
Also if your very close to stoiciometric, but a tad on the lean side the nitrogen is forming bonds and not piggybacking anymore. thus lots of heat. this creates lots of power, but only for about 3 seconds. Then your engine melts into a puddle on the floor. This also makes hippies happy because you are then forced to ride your bike.
Hope that helps as to why you don't just want to run bigger injectors. sorry if I ranted a bit, but sometimes I'm like that.
Also If anything here is wrong let me know. Hate to have whack info floating around. I feel like I'm missing something on the products side... hmmmm. I only have the fluids book in the office. I'll see if I can find the thermo book when I get home...
It'd take an enzo with mods, or a very healthy XJ220, or a pretty mean saleen. Or an ultima skyline. yeah. 
But again, you get the point.