Vance and Hines Pro Pipe
Elite HDF Member
Joined: Sep 2008
Posts: 4,440
Likes: 148
From: Northwest
ROTFLMFAO......AHAHAHAHAHAHAHHAHA....
sata....
2 into 2 will give you maximum horsepower at the upper rpm ranges.
2 into 1, will give you max torque from low to mid rpm.
Depends on how you ride your bike. Also, "more power" is not all inclusive in it's description.
By the way, I doubt anybody at V&H would have told you that the "exhaust pulses get in the way of each other" on a 2 into 1 pipe. On a good 2 into 1 pipe with equal length header pipe, one pipe helps to scavenge the exhaust of the other. The pressure (or back pressure) is more equal between the two cylinders, just like the pressure is more equal on the intake side. So both cylinders are working at closer to the same settings..... yeah, it's probably easier to tune.
sata....
2 into 2 will give you maximum horsepower at the upper rpm ranges.
2 into 1, will give you max torque from low to mid rpm.
Depends on how you ride your bike. Also, "more power" is not all inclusive in it's description.
By the way, I doubt anybody at V&H would have told you that the "exhaust pulses get in the way of each other" on a 2 into 1 pipe. On a good 2 into 1 pipe with equal length header pipe, one pipe helps to scavenge the exhaust of the other. The pressure (or back pressure) is more equal between the two cylinders, just like the pressure is more equal on the intake side. So both cylinders are working at closer to the same settings..... yeah, it's probably easier to tune.
Last edited by archergodwin; Apr 26, 2009 at 10:01 PM.
Banned
Joined: Jul 2007
Posts: 953
Likes: 1
From: underground
Whatever mister know it all what i was trying to say is the reason drag bikes use two into two because thay make more POWER than a two into one if you can find a good tuner to tune them properly, because you can tune each cylender seperatly. With a two into one system the exhaust pulses get in the way of each other.
Uh ya they do because while one is on intake the exhaust on the other is still slightely open depending on cam duration, therefor while exhaust on one is going out the other sucks in slitely with a two into two that still happens because ther not sharing the same pipe but not as bad take a look at the big city thunder baffle and figure it out for yourself, call up big city thunder tech line and ask him about that little ring is actually for and not just the obviuous, ask him about exhaust pulses and harmonics when you cant figure it out and ask him yourself as well as vance and hines im sure there r and d departement know a dam site more than any of you. And the reason you my or may not get more torque from a two into one is because they are easy to tune and ther are not many tuners that actually understand what they are doing they just plug in a download from the internet or what the manufacturer tells them, but if you find a tuner that actually understands exhaust and how to tune a fuel injected motor i'll bet my bottom dollar you have almost identicall torque numbers and more horsepower, than a two into one. Hey no were did i say i new it all i and used to believe to that a two into one system was the **** but i talked to some people at big city thunder baffles and vance and hines for quite some time ,yes for the average joe tuner you will get more torque out of a two into one but a good tuner that knows his salt will get better numbers from a two into two.
Last edited by sata6; Apr 27, 2009 at 08:04 PM.
Tourer
Joined: Nov 2007
Posts: 386
Likes: 0
From: Torrance CA.
To anyone running this pipe.... How do you like it, and how well does it perform ? I have been trying to scrape enough extra cash for a 103" and it aint going to happen anytime soon. So, I'm going to just do the stage one for now. I thought I wanted the thunderheader, but recently have been reading a lot of good about the P.P. And I figured I'd ask all you professionals 
I thought the pipe would be quieter but I have set off more car alarms than with the TH. Really enjoyed the TH but after the wreck I decided to try a different exhaust and so far no regerts.
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Ultimate HDF Member
Joined: Oct 2007
Posts: 7,562
Likes: 11
From: Palm Harbor fl.
Uh ya they do because while one is on intake the exhaust on the other is still slightely open depending on cam duration, therefor while exhaust on one is going out the other sucks in slitely with a two into two that still happens because ther not sharing the same pipe but not as bad take a look at the big city thunder baffle and figure it out for yourself, call up big city thunder tech line and ask him about that little ring is actually for and not just the obviuous, ask him about exhaust pulses and harmonics when you cant figure it out and ask him yourself as well as vance and hines im sure there r and d departement know a dam site more than any of you. And the reason you my or may not get more torque from a two into one is because they are easy to tune and ther are not many tuners that actually understand what they are doing they just plug in a download from the internet or what the manufacturer tells them, but if you find a tuner that actually understands exhaust and how to tune a fuel injected motor i'll bet my bottom dollar you have almost identicall torque numbers and more horsepower, than a two into one. Hey no were did i say i new it all i and used to believe to that a two into one system was the **** but i talked to some people at big city thunder baffles and vance and hines for quite some time ,yes for the average joe tuner you will get more torque out of a two into one but a good tuner that knows his salt will get better numbers from a two into two.
Last edited by rounder; Apr 28, 2009 at 08:01 AM.
