Fuel Injectors
I remember way back when L98s were the thing (I have a 87 vette).
Dyno tests at TPI Specialities showed that using 302 injectors at higher pressures would consistantly produce more power on modestly cammed street engines including 406s up to about 360 HP.The stock 350 TPI induction system seems to be air flow limited (air filter, mass flow sensor, throttle body, intake maniforld etc), not lmited by fuel delivery.
In short, with most of the stick setup you will run out of air before the injectors run out of fuel. TPIS also suggested that the 302 injectors at higher pressure had better atomization and thus the better combustion properties. I wonder if they also might produce a bit better gas mileage. Anyway it appears that bigger injectors might not do as well at metering and atomization, particularly at shorter pulse widths such as those at cruise speeds where gas at $2.50/gal gets important.
If you have a high flow air filter, screens out of the mass flow sensor, bigger throttle body, and maybe bigger manifold and tubes and are pushing 6,000 RPM with a hotter cam you will need bigger injectors to get the last bit of performance. If not, consider tinkering with the pressure on the stock injectors and see how it pulls. If it goes "flat" at higher RPMS could be either air or fuel -- a dyno check monitoring the injector pulse-width tells the tale.
