Originally posted by Dave C
Well fuel dispersion is pretty well handled by the injectors and combustion chamber swirl. Nothing much is going to happen in 1.5" (est) of the port. That why top Honda tuners reshaped the combustion chamber and not the ports.
Actually, Honda engineers and tuners have found that their best results are coming from a proper flow and "swirl" of the air flow starting in the port. By buffeting the air enough to "attack", if you will, the fuel to further disperse it before entering the combustion chamber, they're finding that a more even burn is accomplished, which equals more power with more reliability in tuning. Even though the port runners are not very long, it does have a dramatic affect on how the air is going to enter the combustion chamber.