I'm in process of dividing the Siamese port and will take photos to show progress. Any one try this or know of any info on it. I know about lump ports but that does not eliminate the velocity drop of the big double port bowl
You don't get that much of a drop in velocity as you may think. Don't forget that each intake port is shared by 2 cylinders, so you aren't creating that much of a pressure drop compared to that one large port only feeding just 1 cylinder.
Also Tom's dyno tests showed that there was very little HP lose when dynoing the same head with the bosses removed and no lump in place with theoretically poor velocity vs. the exact same head with the lump bolted in place with theoretically more velocity.
