Header question please help
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Road Master
Joined: Mar 2013
Posts: 1,220
Likes: 14
From: chatham il
Header question please help
I'm ready to order a header for my bike and I have a question. I'm trying to decide (like everyone else) between 2-1-2 and true duals. I'm running Cfr's and a concern of mine is blue ing my right side muffler over time. With my stock decatted header I would say 75% of my exhaust goes through the right side and I would like to change that. I like the look and performance of the v&h power duals but I'm not sure how evenly it distributes exhaust gases? The s&s power tuned true duals are another option and by design maybe they do a better job of distributing the exhaust? Can anyone with either of these pipes let me know how well these header do of sending heat to the left side to share the load? Maybe true duals would be my best option, I just hate to give up the torque becouse motor work is on my checklist so it seems alittle counter productive? Please share your thoughts!
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
how evenly the gasses come out is a minor concern...to me...but your priorities are maybe different
2/1/2 headers will have a couple of extra turns for the left side....consider that side an "overflow" once the right side is flowing capacity.
this is why some mufflers are set up with more restriction on the left side- that restriction will keep the velocity high
at lower rpms, the exhaust gasses through the right side will have good velocity and scavenging, both of which are good for performance.
mike
2/1/2 headers will have a couple of extra turns for the left side....consider that side an "overflow" once the right side is flowing capacity.
this is why some mufflers are set up with more restriction on the left side- that restriction will keep the velocity high
at lower rpms, the exhaust gasses through the right side will have good velocity and scavenging, both of which are good for performance.
mike
Club Member
Joined: Jun 2007
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From: Bedford UK
Advanced
Joined: Apr 2014
Posts: 65
Likes: 1
From: o. Cal
I have the S&S Powertune duals on my RG, and I love them. Pressure pulses feel very even, I use a Dynajet Powervision and have not had to change the fuel map for the rear cylinder, so I think the scavenging of the whole set-up is good. Great looks, quality hardware, and great performance! I think I'll order another set for the EG!
Outstanding HDF Member
Joined: Sep 2010
Posts: 2,630
Likes: 185
From: Mountain West, Big Sky Country
If I had to do over it would either be true duels or a 2 into 1. The 2-1-2 is the worst of both worlds. Unless you restrict one muffler
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Road Captain
Joined: Feb 2012
Posts: 578
Likes: 22
From: Ontario, Canada
I have the S&S Powertune duals on my RG, and I love them. Pressure pulses feel very even, I use a Dynajet Powervision and have not had to change the fuel map for the rear cylinder, so I think the scavenging of the whole set-up is good. Great looks, quality hardware, and great performance! I think I'll order another set for the EG!
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