Hey Glen. I have heard that a c bowl will flow more water because they have bigger more defined vains. I was told back in the day some guys used to cut the knuckle off the bowl and weld a jg ring on it for adjustability. I heard that that was the hot ticket before at bowls. However a good friend of ours says that the 8 vain c bowls detailed will run just as good as a 9 vain.
Like I said, it has never been proven. I have seen guys spend hours and hours converting a JC bowl to a flanged bowl and literally no advantage was realized.
Other than the veins being approximately 1 1/2" longer, the bowls are virtually identical. Not sure how anyone would ever think that more material inside a bowl would actually flow better than one with less interference.
The 9 vane bowl was an interesting innovation because of the elimination of the beat frequency that 4 (the amount of blades on an impeller) against the Berkeley bowl (8 veins) generated. It actually provided a smoother outflow because of this frequency.
Mind you that all of this was theoretical and very difficult to prove in the real world. That being said, I have owned three Agressor bowls (two different generations) and I always felt they had a better bite to them. No top speed increased, but they seemed to have more "punch" out of the hole.
I used to talk with GTH Marine at length about different techniques and it was funny how you would never really get an answer to the "how much performance gain" questions. It was always understood that it is all trial and error, mostly error.....
If someone has some documented proof that a JC will outflow a JG, I would love to see it. It simply does not exist.
GT
