Burns Stainless Exhaust Headers

[Jonny Cash]

I have the 36" version on a 2011 touring RGU. I wanted to try to keep some of the left side with the longer primary. It is on the table right now while I rig up a rear mount off the rear of the transmission to support the muffler better. I don't want to have it break like Ray's did.    I will have an end cap but a more tunable version using SuperTrapp discs and an open end cap. I'll share the results later when I get through the tuning process. I tried to post a pic but it's too large and I am not smart enough to downsize it.  If someone wants to volunteer to help post it I can email it (and a video of it running if wanted).

  I'm running a trap muffler now, disc count definitely makes a difference, although mine does better with a closed end cap. What size are your primary tubes?  I've ran mine without a mid mount two years, no issues.

[kd]

Primaries are 1 7/8, 2, 2 1/8 with the longer 3" baffle megaphone muffler (if you want to call it that  ). The extra primary length was added to the 2 1/8 section. It actually looks a little better in my eyes. It ends about 2.5 " past the rear axle. Vince had this made for me over a year ago to be longer to try to keep some left side power. I got held up in putting the engine together so we never got a chance to see the effect. It appears they decided to offer the longer pipe anyway.

[Jonny Cash]

Primaries are 1 7/8, 2, 2 1/8 with the longer 3" baffle megaphone muffler (if you want to call it that  ). The extra primary length was added to the 2 1/8 section. It actually looks a little better in my eyes. It ends about 2.5 " past the rear axle. Vince had this made for me over a year ago to be longer to try to keep some left side power. I got held up in putting the engine together so we never got a chance to see the effect. It appears they decided to offer the longer pipe anyway.

The long pipe does look good.  Same primary size as I ran last year.  I'm going the other way, trying to give up some left side power, shortening mine to 32" primary with a 3" baffle megaphone..  I'll post results ina few weeks.

[Don D]

Unfortunately getting a pipe to work properly can get very ugly. Recent rule changes for those that compete in the Engine Masters, case and point. They now have to use header that would work in a road car rather than a dyno cell.

Function is pretty enough. Burning the rider would be less than functional.

No rules have been dropped for EMC

Did I suggest burning a rider is viable?
My point was bend radius plus lengths and diameters conducive to making power and torque can start to push the packaging envelope.
And EMC did add a header rule:
"Passenger car chassis  style  headers required.  Header must  be  manufactured  and cataloged  to  fit  a  specific passenger car application  OEM  equipped  with  the  engine type  claimed."

[leafman60]

I just looked at that picture of the pipe again. That is one ugly piece.

How would you route it to keep function and make it pretty? Seems it's this or how the Guppy was routed are the only options in a 2:1

I agree. Just had head pipes made for my Dyna. It was either a leg burner to get equal lengths, or a compromise.

Did Burns make that set???

.

[build it]

Unfortunately getting a pipe to work properly can get very ugly. Recent rule changes for those that compete in the Engine Masters, case and point. They now have to use header that would work in a road car rather than a dyno cell.

Function is pretty enough. Burning the rider would be less than functional.

No rules have been dropped for EMC

Did I suggest burning a rider is viable?
My point was bend radius plus lengths and diameters conducive to making power and torque can start to push the packaging envelope.
And EMC did add a header rule:
"Passenger car chassis  style  headers required.  Header must  be  manufactured  and cataloged  to  fit  a  specific passenger car application  OEM  equipped  with  the  engine type  claimed."

Rules were dropped. That's going to get things interesting in the shop. Header design takes a way back seat in blower builds from what I've seen (at least with v8s).

You didn't suggest much. What does EMC have to do with Burns pipes?

[C-Cat]

I just looked at that picture of the pipe again. That is one ugly piece.

How would you route it to keep function and make it pretty? Seems it's this or how the Guppy was routed are the only options in a 2:1

I agree. Just had head pipes made for my Dyna. It was either a leg burner to get equal lengths, or a compromise.

Did Burns make that set???

.

Only the muffler and collector,SPF did the headpipes.Pic of mock up below

http://i263.photobucket.com/albums/ii140/C-Cat-61/14325_zps89apqnzg.jpeg

[build it]

]

Only the muffler and collector,SPF did the headpipes.Pic of mock up below

http://i263.photobucket.com/albums/ii140/C-Cat-61/14325_zps89apqnzg.jpeg

C-cat, looks good. How'd it perform?

[C-Cat]

Still gathering pieces, ordering hpi 58mm tb/intake and backing plate. Also need to fix leaking cylinder on my RG first, as its my daily ride. Should be together end of April or early May. Hoping for  150's hp and 140's tq.

[No Cents]

 C-Cat...that is one good looking pipe! 

Ray

[C-Cat]

Thx No Cents!

[leafman60]

I just looked at that picture of the pipe again. That is one ugly piece.

How would you route it to keep function and make it pretty? Seems it's this or how the Guppy was routed are the only options in a 2:1

I agree. Just had head pipes made for my Dyna. It was either a leg burner to get equal lengths, or a compromise.

Did Burns make that set???

.

Only the muffler and collector,SPF did the headpipes.Pic of mock up below

http://i263.photobucket.com/albums/ii140/C-Cat-61/14325_zps89apqnzg.jpeg

http://stevesprecision.com/


.

[N-gin]

Nice

[kd]

I realize how old this thread is but I was drawn here by a current discussion and decided to scan a few pages. It seems there were more than a few members looking for a dyno sheet to get an idea of the Burns raw torque curve (that didn't get any answers). This is one from my built 120 (specs in the dyno thread) as compared to a Dragula 1 pipe (2.55 baffle). The Burns is an 8" longer primary from the general production pipe and has the 3" baffle without an end cap device. I am very close to adding another run with a stinger using 4" ST discs and an open end cap. At that time I'll report on the sound level and let the dyno sheet comparison speak for itself. There won't be any track runs to weigh in with.

I'll add that any WOT differences in the curve you see are not seat of the pants noticeable (because it lights the tire up)  until mid range and then the Burns plays a little harder. (The first 3 gears can't be hammered hard without wheel spin)

http://harleytechtalk.com/htt/index.php?topic=99409.0