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Old 02-04-2009, 09:39 PM   #1
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Default 5port vs 7port

what are the pros and cons for 5port and 7port race applications?
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Old 02-04-2009, 09:58 PM   #2
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Well, it's hard to say because not every motor is the same. like the 5 port ninja JX isn't the same as an rb S5.

Hell, my O.S. Speed is just a 3 port motor, and I bet you it can haul a$$ around alot of 5, and 7 port engines. Generally the fewer the ports the better the fuel mileage, but that's not always true either.
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Old 02-04-2009, 10:03 PM   #3
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Usually a 5 port engine will always have more bottom end grunt and get into power band faster than a 7port motor. With this being said a 7 port does not always have the torque of a 5 port but will usually move the power band over to the right, meaning it will perform better in the upper rpm range, more top end. There are times I prefer a 7 port such as big fast tracks, slick or loose conditions, etc. On a smaller tighter track the 5 port would be the way to go, more speed and power from turn to turn. For most of the tracks here in the States a 5 port would be optimum. Good luck.
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Old 02-04-2009, 10:11 PM   #4
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Generally like the other said, the more ports amotor has, the shorter the runtimes, and the better top end it has. less ports=more torque..... More ports=less torque, more top, you can make adjustments with the right pipes
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