Originally Posted by
MantisWorx
Yes, you are correct! except for the port volume, A 9 port will fill that volume much quicker than a 5 port which goes back to the fact that a 9 port will make more low end power than a 5 port!! My 9 port is stronger across the board and i use clutch/pipe/gearing to keep it on the pipe!
Yes and no. The more/larger ports you have the less vacuum you produce at lower rpm. This decreases airflow at lower rpm. The more ports you have the more rpm you have to turn to create the same amount of vacuum.
If you compare the same vacuum numbers between a 9 poet and 5 port the 9 port will be making more power, it just takes more rpm to get there.
I am not advocating that less ports is superior, but they do make power fast than more ports. I have no doubt that a properly clutched/geared 9 port is superior in power to a 5 port.
But on a dyno side by side the 5 port will make power sooner than the 9 port.