Another Exhaust Question

Navigator · 02-17-2015, 01:03 AM

As I put more miles on my 07 Nomad I have begun to think that this catalytic converter must go. I've searched the forum for exhaust threads, and there are a ton of them, but one that was of interest was changing out the stock mufflers for aftermarket. It addressed returning but not the elimination of the CC.

As I look at the stock exhaust system it appears to me that installing aftermarket mufflers wouldn't do much since the goat belly will remain. I guess I already know the answer to this but in order to get rid of the CC, doesn't entire exhaust system from header to mufflers have to be replaced? Does anyone make aftermarket mufflers that bolt up to the header crossover and eliminating the CC?

Peg · 02-17-2015, 01:31 AM

Vance & Hines or Cobra... both make full exhaust systems for your Nomad.

dshelly · 02-17-2015, 06:55 AM

If you can find a set of V&H head pipes, then you can use just about any mufflers you want. You just might have to make a set of adapters to mount them. But that's easy to do.

nomad ryder · 02-17-2015, 12:26 PM

There's a lot of info on gutting out the goat belly, but also a lot of opinions by those who have done it that it wasn't really worth it. I've seen somewhere a guy in Sweden was making a gb replacement manifold, a real nice welded stainless tube unit. I decided to just leave mine.

**BudMan** · 02-17-2015, 03:46 PM

Quote:

Originally Posted by Navigator

Does anyone make aftermarket mufflers that bolt up to the header crossover and eliminating the CC?

No.

redjay · 02-17-2015, 04:00 PM

I gutted the goatbelly on my 06 and wished I hadn't. I did not like the sound and the bike had less torque. I put a stock one back one.

I don't think the bypass made in Sweden is available anymore.

Navigator · 02-18-2015, 12:49 AM

Quote:

Originally Posted by BudMan

No.

Short and to the point Dave. And as I assumed. Damn.

topwop · 03-17-2015, 08:44 PM

I have a set of Cobras I just took off, too loud for me, but you might like them.
They were on the 06 Nomad I just bought with only 6800 miles on them. He had the dealer put them on when he bought it new so all hardware is here and it's a pretty easy swap.
Let me know if your interested.

**nomadtom69** · 03-18-2015, 01:48 AM

Message sent on the Cobra Pipes I am interested

mobandy78 · 03-18-2015, 09:47 AM

Get a set of Cobras. They are easy to install, sound great, and they eliminate that hunk of heavy metal in the middle. You won't be disappointed. I bought mine used on ebay for about $300.

Navigator · 03-18-2015, 05:18 PM

Will this Cobra exhaust system eliminate the cat? It appears to still be on it in this picture. The last thing I want is to purchase an exhaust system that accommodates that darn thing.

Also, the listing says it the use of an aftermarket fuel system module is recommended. I have always rejeted the carbs on my Harleys when installing a performance exhaust but hoped it would not be necessary to make this type of mod, in the case of my '09, to the ECU.

http://www.jpcycles.com/product/ZZ49...FQaTfgodBVUADw

cactusjack · 03-18-2015, 06:42 PM

The only exhaust that uses that goatbelly catalytic convertor is the stock exhaust system. V&H or Cobras will eliminate it completely.

Navigator · 03-18-2015, 06:50 PM

Just found them new on ebay delivered for $453, an excellent price for a full exhaust. For Harleys they always seemed to be
$600-$900 and stupidly for the Rocket 3 about $1100.

Anyone on the need to modify the ECU and the dealerships don't seem to want to talk about it. I don't want to blue the exhaust or burn a valve.

Peg · 03-19-2015, 12:33 AM

They all benefit from a fuel controller of some sort... I had a Dobeck on my Nomad, and installed their EJK on the Voyager.

They're intentionally lean (see what I did there?) from the factory. The Nomad ran much better, used lower grade fuel, and provided much improved fuel consumption figures after the Dobeck was installed. And that was with a mostly stock exhaust.

The Voyager showed similar (if not quite so good) improvement.

Fuel management is now one of the first things I'll change on a new bike... Air and exhaust can wait their turn.

Navigator · 03-19-2015, 05:46 AM

Quote:

Originally Posted by Peg

They all benefit from a fuel controller of some sort... I had a Dobeck on my Nomad, and installed their EJK on the Voyager.

They're intentionally lean (see what I did there?) from the factory. The Nomad ran much better, used lower grade fuel, and provided much improved fuel consumption figures after the Dobeck was installed. And that was with a mostly stock exhaust.

The Voyager showed similar (if not quite so good) improvement.

Fuel management is now one of the first things I'll change on a new bike... Air and exhaust can wait their turn.

Thanks Peg and I do get the "lean", though I can't figure out how you changed the font. :)

On my Rocket I used a free program called Tune ECU. TuneBoy out of Oz designed the original software to essentially break into the ECU to reprogram it but it cost about $400USD. I believe it was a guy in France who developed the free TuneEcu software. HANSO of NZ tweaked one of the standard tunes for my Rocket 3 to get the perfect mixture.

I wish we had something like TuneEcu for the Nomad. I am no familiar with either of those modules you mention.

02-17-2015, 01:03 AM	#1
Navigator Advanced Member Join Date: Nov 2014 Location: Banner, WA Posts: 644	Another Exhaust Question As I put more miles on my 07 Nomad I have begun to think that this catalytic converter must go. I've searched the forum for exhaust threads, and there are a ton of them, but one that was of interest was changing out the stock mufflers for aftermarket. It addressed returning but not the elimination of the CC. As I look at the stock exhaust system it appears to me that installing aftermarket mufflers wouldn't do much since the goat belly will remain. I guess I already know the answer to this but in order to get rid of the CC, doesn't entire exhaust system from header to mufflers have to be replaced? Does anyone make aftermarket mufflers that bolt up to the header crossover and eliminating the CC? __________________ Mike USN Retired 2007 Nomad Login or Register to Remove Ads
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02-17-2015, 01:31 AM	#2
Peg Sr. Member Join Date: Apr 2012 Location: West Coast, North Island, New Zealand Posts: 1,375	Vance & Hines or Cobra... both make full exhaust systems for your Nomad. __________________ Nothing screams poor workmanship like wrinkles in the duct tape '02 1500 blonde Nomad (Sold) '97 800 burgundy Classic (Sold)
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02-17-2015, 06:55 AM	#3
dshelly Sr. Member Join Date: Mar 2012 Location: Belgrade, MT Posts: 2,824	If you can find a set of V&H head pipes, then you can use just about any mufflers you want. You just might have to make a set of adapters to mount them. But that's easy to do. __________________ Dave "(dshelly)" Shellenberger 2014 Harley Ultra Classic 2007 1600 Nomad (Black) Shellenberger Machine Belgrade, MT Various Bagger Member (Harley Chapter) VBA # 2395
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02-17-2015, 04:00 PM	#6
redjay Top Contributor Join Date: Feb 2008 Location: Ontario Posts: 6,953	I gutted the goatbelly on my 06 and wished I hadn't. I did not like the sound and the bike had less torque. I put a stock one back one. I don't think the bypass made in Sweden is available anymore. Last edited by redjay; 02-17-2015 at 04:05 PM.
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03-18-2015, 01:48 AM	#9
nomadtom69 Join Date: Sep 2010 Location: Maryville, Tn Posts: 2,656	Message sent on the Cobra Pipes I am interested __________________ (NomadTom69)Tom Green Previous bikes - 2004 BMW R1200 CLC 2006 Nomad 1600 Black -1985 BMW K100 RT VBA #001609 Viet-Nam Vet 71-72 Maryville , Tn. Maggie Valley '11-Townsend '12-Estes Park '13- Copperhead fall rally "13- Elkins WV '14- Eureka Springs ' 15- Helen Ga. SE Rally '16
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02-17-2015, 12:26 PM	#4
nomad ryder Member Join Date: Nov 2013 Location: Orange County, CA Posts: 274	There's a lot of info on gutting out the goat belly, but also a lot of opinions by those who have done it that it wasn't really worth it. I've seen somewhere a guy in Sweden was making a gb replacement manifold, a real nice welded stainless tube unit. I decided to just leave mine.
	0

03-17-2015, 08:44 PM	#8
topwop Jr. Member Join Date: Mar 2015 Location: Cuyahoga Falls, ohio Posts: 12	I have a set of Cobras I just took off, too loud for me, but you might like them. They were on the 06 Nomad I just bought with only 6800 miles on them. He had the dealer put them on when he bought it new so all hardware is here and it's a pretty easy swap. Let me know if your interested.
	0

03-18-2015, 09:47 AM	#10
mobandy78 Sr. Member Join Date: Sep 2009 Location: Owasso, OK Posts: 1,485	Get a set of Cobras. They are easy to install, sound great, and they eliminate that hunk of heavy metal in the middle. You won't be disappointed. I bought mine used on ebay for about $300. __________________ Matt "Mo" Moore Owasso, Oklahoma VBA #1250 2005 Nomad 1600 - Darkside "There is no normal life, there's just life. So get on with it." - Doc Holiday
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03-18-2015, 05:18 PM	#11
Navigator Advanced Member Join Date: Nov 2014 Location: Banner, WA Posts: 644	Will this Cobra exhaust system eliminate the cat? It appears to still be on it in this picture. The last thing I want is to purchase an exhaust system that accommodates that darn thing. Also, the listing says it the use of an aftermarket fuel system module is recommended. I have always rejeted the carbs on my Harleys when installing a performance exhaust but hoped it would not be necessary to make this type of mod, in the case of my '09, to the ECU. http://www.jpcycles.com/product/ZZ49...FQaTfgodBVUADw __________________ Mike USN Retired 2007 Nomad
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03-18-2015, 06:42 PM	#12
cactusjack Mega-Contributor Join Date: Sep 2007 Location: Where it doesn't snow...ever! Posts: 21,926	The only exhaust that uses that goatbelly catalytic convertor is the stock exhaust system. V&H or Cobras will eliminate it completely. __________________ Scott "Cactusjack" Hanks VBA #00105 H.O.G. #4250060 2011 H-D Ultra Limited 103ci :: 2011 HD Electra Glide Ultra Limited w/Stage 1 :: Rallies: Mesquite '08\|Custer '09\|Cortez '10\|Crescent City '11\|Kanab '12\|Antlers '12\|Estes Park '13\|Antlers '13\|Orofino '14\|The Dalles '17
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03-18-2015, 06:50 PM	#13
Navigator Advanced Member Join Date: Nov 2014 Location: Banner, WA Posts: 644	Just found them new on ebay delivered for $453, an excellent price for a full exhaust. For Harleys they always seemed to be $600-$900 and stupidly for the Rocket 3 about $1100. Anyone on the need to modify the ECU and the dealerships don't seem to want to talk about it. I don't want to blue the exhaust or burn a valve. __________________ Mike USN Retired 2007 Nomad
	0

03-19-2015, 12:33 AM	#14
Peg Sr. Member Join Date: Apr 2012 Location: West Coast, North Island, New Zealand Posts: 1,375	They all benefit from a fuel controller of some sort... I had a Dobeck on my Nomad, and installed their EJK on the Voyager. They're intentionally lean (see what I did there?) from the factory. The Nomad ran much better, used lower grade fuel, and provided much improved fuel consumption figures after the Dobeck was installed. And that was with a mostly stock exhaust. The Voyager showed similar (if not quite so good) improvement. Fuel management is now one of the first things I'll change on a new bike... Air and exhaust can wait their turn. __________________ Nothing screams poor workmanship like wrinkles in the duct tape '02 1500 blonde Nomad (Sold) '97 800 burgundy Classic (Sold)
	0