L
leathl721
Guest
i have a 1979 gs705e and it has a 4 into 1 header. I was wondering if i put dual pipes on it, will i have more power throughout the bike or just leave it as it?
-
Required reading for all forum users!!!
Welcome!
Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.A note to new registrants...
All new forum registrations must be activated via email before you have full access to the forum.A Special Note about Email accounts!
DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.A note to old forum members...
I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.
Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...
-
Returning Visitors
If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.
If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.
G
Guest
Guest
A 4 into 1 pipe gives a bike more power, IF the carbs are adjusted properly for the pipe, if they're not the bike may run like crap and have less power 
S
srg
Guest
How does a 4-to-1 give it more power? I'm not questioning you, just trying to understand.
In my head, a 4-to-1 would increase the resistance in the exhaust (since there's one exit pipe instead of two in a 4-to-2). More resistance = more energy needed to "push" the exhaust out = less power to wheels.
But I may be misunderstanding something.
In my head, a 4-to-1 would increase the resistance in the exhaust (since there's one exit pipe instead of two in a 4-to-2). More resistance = more energy needed to "push" the exhaust out = less power to wheels.
But I may be misunderstanding something.
Last edited:
6
650cafe
Guest
I've often wondered this too. I dont question it to be true, all one needs to do is look at MotoGP exhaust systems and factory sport bike systems, but I dont understand how a (seemingly) more restrictive exhaust can provide better performance. My theory is that it may not necessarily provide the greatest outright performance, but instead the highest degree of desired performance.
It comes down to better scavenging of the exhaust gasses. This is especially true at higher RPMS. The exhaust pulses actually "pull" the gasses through the exhaust more efficiently at higher RPMs with some sacrifice at the lower end. This creates more of a vacuum at the exhaust port providing better evacuation of the cylinders. 4 into 1 exhaust also make it a little easier to balance the intake since all cylinders should be balanced equally. This is also true for a 4 into 2 into 1 system. This all assumes that the 4 into 1 exhaust is designed properly. There is also the potential for better cornering clearance as well.
G
GelandeStrasse
Guest
+ less weight
6
650cafe
Guest
was just gonna say that...thanks for the explaination JT...and everything you said confirms my theory...it's about making a certain kind of power...up high in the range where racebikes live. Exhaust/intake theory is quite complex and interesting. I remember reading an article in Cycle World with Steve Schiebe, the director of Harley's VR1000 program. He spoke about specific aspects of tuning, primarily using fuel injection, where he talked about attaining "best power", in which case in intake system would actually create pulse waves pushing intake mixture out of the engine, creating what is called "stand-off". Not sure if its relevant, but its interesting.