5 port 7 port what are they??
10-01-2007, 04:27 PM
#6
I believe the Mach 427 is a 7 or 8 port. That's why they haul ass. Sometimes engines are labeled as 7+1. This does not mean 8 port. It means there is an extra transfer port that moves the air/fuel mixture around to make the engine more powerful or more efficient.
10-01-2007, 04:59 PM
#8
Man, I can't remember right now how the ports are supposed to affect fuel mileage. I've read it before but I wasn't concerned about it. I have some 3 port motors that are wicked fast and get around 9-11 minutes depending on how good I'm driving. I don't see a lot of people testing run times under controlled conditions so it's hard to say. And each person has a different tune, with different engines, different vehicles, tires, clutches, springs, weight. It goes on and on. Basically, I can't answer that one.
10-01-2007, 06:20 PM
#9
Well back in the day , more ports ment a leaner mix,thus better fuel economy . BUT this also lead to more rpm and this messed up the tuned pipes magic and you got worse economy ,then better pipe and the economy went up and so on and so forth , now we have this OS 3 port VSPEC that gets retarded economy tuned correctly and the 367 Nova that has like 11 ports also getting good economy ?
So it is really tough to answer that question . There is more magic to the ports than most realize! They control engine temp,timing,rpm, power and the list goes on . Then you have the tuned pipe ! This is an integral part as well !
It is basically the supercharger for a 2 stroke engine . The correct pipe will yield incredible results . The wrong choice ..... total pig !!
And then there is personal preference .....
You will just need to experiment and come to your own conclusions ,and remember to keep notes for your self .
So it is really tough to answer that question . There is more magic to the ports than most realize! They control engine temp,timing,rpm, power and the list goes on . Then you have the tuned pipe ! This is an integral part as well !
It is basically the supercharger for a 2 stroke engine . The correct pipe will yield incredible results . The wrong choice ..... total pig !!
And then there is personal preference .....
You will just need to experiment and come to your own conclusions ,and remember to keep notes for your self .
10-01-2007, 06:33 PM
#10
Well back in the day , more ports ment a leaner mix,thus better fuel economy . BUT this also lead to more rpm and this messed up the tuned pipes magic and you got worse economy ,then better pipe and the economy went up and so on and so forth , now we have this OS 3 port VSPEC that gets retarded economy tuned correctly and the 367 Nova that has like 11 ports also getting good economy ?
So it is really tough to answer that question . There is more magic to the ports than most realize! They control engine temp,timing,rpm, power and the list goes on . Then you have the tuned pipe ! This is an integral part as well !
It is basically the supercharger for a 2 stroke engine . The correct pipe will yield incredible results . The wrong choice ..... total pig !!
And then there is personal preference .....
You will just need to experiment and come to your own conclusions ,and remember to keep notes for your self .
So it is really tough to answer that question . There is more magic to the ports than most realize! They control engine temp,timing,rpm, power and the list goes on . Then you have the tuned pipe ! This is an integral part as well !
It is basically the supercharger for a 2 stroke engine . The correct pipe will yield incredible results . The wrong choice ..... total pig !!
And then there is personal preference .....
You will just need to experiment and come to your own conclusions ,and remember to keep notes for your self .
10-01-2007, 06:42 PM
#11
The JP pipes worked good on my Mach. Just don't put the JP-1 on. LOL. It gives the engine retarded amounts of torque. I think it could pull my 1:1 truck. Kidding. It gave so much wheelspin I had to back the servo down to only open about halfway. It started to feel like I had control after that. But I recommend not using the JP-1 on the Mach 427. The 2 and 3 pipes worked good for me.
10-01-2007, 07:57 PM
#12
Good question Rob, that helps out some.
10-01-2007, 08:04 PM
#13
also the amount of ports doesn't include the exhaust port
10-02-2007, 11:22 AM
#15
The JP pipes worked good on my Mach. Just don't put the JP-1 on. LOL. It gives the engine retarded amounts of torque. I think it could pull my 1:1 truck. Kidding. It gave so much wheelspin I had to back the servo down to only open about halfway. It started to feel like I had control after that. But I recommend not using the JP-1 on the Mach 427. The 2 and 3 pipes worked good for me.
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