2-1 headers
Outstanding HDF Member
Joined: Apr 2006
Posts: 2,395
Likes: 25
From: St George, UT
RE: 2-1 headers
For looks and sound, I just wish Harley would replicate the early fifties 2 in 1 system. It would look like the current headers with out the crossover, and the muffler would be similar to today's bagger shape and size, but with a tip that would allow shark fins end caps that didn't extend past the rear fender. The sound just said "Motorcycle".[8D]
RE: 2-1 headers
I don't like most 2-1's but I do like mine, I think they flow nicely with the bike. I know you said don't tell you what we have or how much we like them, but you did also ask what we think so I got confused.
Intermediate
Joined: Nov 2007
Posts: 44
Likes: 0
RE: 2-1 headers
Reinhardt 2into1 coated is a nice pipe.Not much up angle however(only on the v-rod). Could have someone heat and bend a thunderheader up but then you'll have a mounting issue. All the waffle cone tips look retarded and the pro-pipe has a hole the size of big grapefruit. There is a compony that did 2/1 race pipes a few years ago for H-D and said that there still working out the kinks to get a street pipe that won't blow your head off under WFO riding but I've yet to see any data on it...
Thread Starter
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Road Captain
Joined: Apr 2007
Posts: 706
Likes: 1
RE: 2-1 headers
Here's what I know about 2-1 systems for Harleys. It's all in the header and collector, with the muffler only serving to move the peaks around (usually lower)withlittle power reduction if designed properly.
The pipe lengths for what works beston 99% of all Harley motors has been long since been carved in stone. (a lot of makers are disregarding this info however for looks and because they don't have the skill to do it right) You can play around with steps and diameter a little to compensate for compression and cams.
I would be ashamed to put my name on most of them just for the crappy welds alone.
A common manifold H-D motor doesn't want equal length tubes if it's on a 2-1 system. The percentage difference called for between carbed motors and injected motors is different. (Most makers have not picked up on this either).
The pipe lengths for what works beston 99% of all Harley motors has been long since been carved in stone. (a lot of makers are disregarding this info however for looks and because they don't have the skill to do it right) You can play around with steps and diameter a little to compensate for compression and cams.
I would be ashamed to put my name on most of them just for the crappy welds alone.
A common manifold H-D motor doesn't want equal length tubes if it's on a 2-1 system. The percentage difference called for between carbed motors and injected motors is different. (Most makers have not picked up on this either).
Tourer
Joined: Apr 2007
Posts: 376
Likes: 0
From:
RE: 2-1 headers
Having worked in the motorcycle exhaust industry for the last 12 years I can say that it is not as easy as you think.
Something that makes power and looks good is sometimes hard to fit in the OEMspace. OR Sales and marketing just doesnt like the "look" of the pipe.
And what do you shoot for? The mods that a HD owner can do to their engine are endless. Then you need to produce an EFI map or carb recalibration baseline.
I designed the current SuperTrapp 2:1 headpipe. My thought process was to the point where I had one headpipe that for both dyna and softails. For those that do not know, those engines are positioned differently in F/R rotation. I also had to take into consideration all the different foot rest/floorboard/brake pedal locations in the design process.
I think it is a tight design AND it makes good power on stock as well as big inch engines.
You also have to take into account who will be buying the system for re sale and what they want, so sometimes the BEST design is shelved for looks and durability.
With all the EPA sound and emission restrictions on the horizon there is unbelieveable room for exhaust pipe development.
I mostly work on off road machines these days where power andquietare the biggest issue.
Currently I amtesting with a helmholtz chamber ( I used it on the Kerker Buell Blast system I designed years ago) and am getting interesting results so far.
Good luck in your quest on designing a system for your machine.
Something that makes power and looks good is sometimes hard to fit in the OEMspace. OR Sales and marketing just doesnt like the "look" of the pipe.
And what do you shoot for? The mods that a HD owner can do to their engine are endless. Then you need to produce an EFI map or carb recalibration baseline.
I designed the current SuperTrapp 2:1 headpipe. My thought process was to the point where I had one headpipe that for both dyna and softails. For those that do not know, those engines are positioned differently in F/R rotation. I also had to take into consideration all the different foot rest/floorboard/brake pedal locations in the design process.
I think it is a tight design AND it makes good power on stock as well as big inch engines.
You also have to take into account who will be buying the system for re sale and what they want, so sometimes the BEST design is shelved for looks and durability.
With all the EPA sound and emission restrictions on the horizon there is unbelieveable room for exhaust pipe development.
I mostly work on off road machines these days where power andquietare the biggest issue.
Currently I amtesting with a helmholtz chamber ( I used it on the Kerker Buell Blast system I designed years ago) and am getting interesting results so far.
Good luck in your quest on designing a system for your machine.
Thread Starter
|
Road Captain
Joined: Apr 2007
Posts: 706
Likes: 1
RE: 2-1 headers
ORIGINAL: ohiomotoxer
Having worked in the motorcycle exhaust industry for the last 12 years I can say that it is not as easy as you think.
Something that makes power and looks good is sometimes hard to fit in the OEMspace. OR Sales and marketing just doesnt like the "look" of the pipe.
And what do you shoot for? The mods that a HD owner can do to their engine are endless. Then you need to produce an EFI map or carb recalibration baseline.
I designed the current SuperTrapp 2:1 headpipe. My thought process was to the point where I had one headpipe that for both dyna and softails. For those that do not know, those engines are positioned differently in F/R rotation. I also had to take into consideration all the different foot rest/floorboard/brake pedal locations in the design process.
I think it is a tight design AND it makes good power on stock as well as big inch engines.
You also have to take into account who will be buying the system for re sale and what they want, so sometimes the BEST design is shelved for looks and durability.
With all the EPA sound and emission restrictions on the horizon there is unbelieveable room for exhaust pipe development.
I mostly work on off road machines these days where power andquietare the biggest issue.
Currently I amtesting with a helmholtz chamber ( I used it on the Kerker Buell Blast system I designed years ago) and am getting interesting results so far.
Good luck in your quest on designing a system for your machine.
Having worked in the motorcycle exhaust industry for the last 12 years I can say that it is not as easy as you think.
Something that makes power and looks good is sometimes hard to fit in the OEMspace. OR Sales and marketing just doesnt like the "look" of the pipe.
And what do you shoot for? The mods that a HD owner can do to their engine are endless. Then you need to produce an EFI map or carb recalibration baseline.
I designed the current SuperTrapp 2:1 headpipe. My thought process was to the point where I had one headpipe that for both dyna and softails. For those that do not know, those engines are positioned differently in F/R rotation. I also had to take into consideration all the different foot rest/floorboard/brake pedal locations in the design process.
I think it is a tight design AND it makes good power on stock as well as big inch engines.
You also have to take into account who will be buying the system for re sale and what they want, so sometimes the BEST design is shelved for looks and durability.
With all the EPA sound and emission restrictions on the horizon there is unbelieveable room for exhaust pipe development.
I mostly work on off road machines these days where power andquietare the biggest issue.
Currently I amtesting with a helmholtz chamber ( I used it on the Kerker Buell Blast system I designed years ago) and am getting interesting results so far.
Good luck in your quest on designing a system for your machine.
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Thread Starter
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Road Captain
Joined: Apr 2007
Posts: 706
Likes: 1
RE: 2-1 headers
ORIGINAL: huffhuff
i have a near new Hooker 2-1 hanging in the rafters in my garage. i love the quick tunability but didn't like the look and went back to my dual slipons.
i have a near new Hooker 2-1 hanging in the rafters in my garage. i love the quick tunability but didn't like the look and went back to my dual slipons.