Originally Posted by ScottyM

5 port IMO is the best all around.. 3-port typically will have slightly more bottom end, and they tend to get slightly better fuel mileage then higher port count motors, 7-port is typically the screamer, with the worst fuel mileage.. This is assuming timing is the same on port counts.. But most manufactures change timing from one version of engine to the next to get the most out of each engine.