Exhaust Catalyst Removal? - Victory Forums - Victory Motorcycle Forum
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post #1 of 56 (permalink) Old 12-14-2012, 06:34 PM Thread Starter
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Default Exhaust Catalyst Removal?

When I picked up my Ness Vision, I rode it 1400 miles home. On the first morning while walking up to it I noticed the cross over pipe was damaged by someone in the past. Like it was scraped big time over a curb. It was obviously old damage.

Long story short, I convincingly argued that since it was considered a "new bike" from the dealership and was an "executive demo" from Victory, any damage present would have been caused by Victory and therefore repaired/replaced under warranty.

Don't know what he said to get Victory to get it warrantied but I just received the new pipe in the mail. The thing is the entire rear cylinder exhaust down to both mufflers. Big piece to include the heat shields.

I noticed that there are two "catalysts" in the pipes. At least that's what they are called in the service manual.



Anyone know if they are truly needed? Pros or cons of removing? I'm assuming it's an emissions thing or maybe a back pressure thing.

If it's like a car, would only be good from a performance perspective on removing them.

2012 #20 NESS Vision DARKSIDE BABY!
Stage 1 w/D&D pipes + lots of Victory add ons. PC-V w/AT, Lloyd's intake, filter, ATS, & Variable Clutch.
2013 Bushtec Entourage in matching Ness color and graphics - See the PAINTED TO MATCH process
Wife rides a 2016 Gunner

LONGMONT COLORADO
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post #2 of 56 (permalink) Old 12-15-2012, 06:01 AM
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From what I have read on here and other sites is that you can remove them but you will definitely need a fuel controller added because of the loss of back pressure.

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OEM short windshield, passenger backrest, crash bars, saddle bag bars, heated grips, vinyl closeouts, tachometer, ambient temp, LED headlight, luggage rack. WD lay down licence plate.
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post #3 of 56 (permalink) Old 12-15-2012, 06:17 AM
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Quote:
Originally Posted by TheMike View Post
Anyone know if they are truly needed?
If you wish to keep the bike street legal, then the answer is yes. If you do get rid of them, take them to a scrap yard. The platinum inside is worth $.

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Pros or cons of removing?
An engine is an air pump. Theoretically, you can flow more air (make more power) without such impediments. But often there is more to theory than meets the eye.

Quote:
Originally Posted by TheMike View Post
I'm assuming it's an emissions thing
You're a good guesser. Enjoy your new pipes.




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Last edited by saddlebag; 12-15-2012 at 06:22 AM.
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post #4 of 56 (permalink) Old 12-15-2012, 07:38 AM
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I would put in storage, you might need it someday to legal sell it..Illegal pipes are going to be just that someday.

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post #5 of 56 (permalink) Old 12-15-2012, 09:14 AM
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Supposedly Victory uses the cat. as a velocity device and it helps maintain exhaust gas velocity. That's what Kevin X told me.


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post #6 of 56 (permalink) Old 12-15-2012, 09:43 AM Thread Starter
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Since I have a controller and I plan to do other mods like cams one day, it wouldn't hurt? Maybe help?

2012 #20 NESS Vision DARKSIDE BABY!
Stage 1 w/D&D pipes + lots of Victory add ons. PC-V w/AT, Lloyd's intake, filter, ATS, & Variable Clutch.
2013 Bushtec Entourage in matching Ness color and graphics - See the PAINTED TO MATCH process
Wife rides a 2016 Gunner

LONGMONT COLORADO

Last edited by TheMike; 04-14-2013 at 09:41 PM.
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post #7 of 56 (permalink) Old 12-15-2012, 10:57 AM
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Well, according to Kevin's Dyno tuning experience, he strongly recommends keeping it in the pipe. I was surprised about that, and still scratch my head over it, but I believe he has VASTLY more knowledge about this than me, and most other people as far as that goes. Find him, and PM him about it. See what he says.

2009 Kingpin 8 Ball
Freedom Performance sharp curve radius pipes
Cross Roads bags mounted with Witchdoctor brackets
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post #8 of 56 (permalink) Old 12-15-2012, 11:05 AM Thread Starter
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Sounds good. Thanks.

2012 #20 NESS Vision DARKSIDE BABY!
Stage 1 w/D&D pipes + lots of Victory add ons. PC-V w/AT, Lloyd's intake, filter, ATS, & Variable Clutch.
2013 Bushtec Entourage in matching Ness color and graphics - See the PAINTED TO MATCH process
Wife rides a 2016 Gunner

LONGMONT COLORADO
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post #9 of 56 (permalink) Old 12-15-2012, 12:00 PM
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If you come back and read this think of this.
Your ECM is designed to function with the cats in place so if you gut the pipes your ECM will not function the way it should.
Yes your bike will still run but you will not get all the true benefits.

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post #10 of 56 (permalink) Old 12-15-2012, 12:27 PM Thread Starter
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I totally understand how changing or modifying the bike from stock can affect the ECU and programming and performance etc.

It is also designed to work with the stock mufflers, stock air intake and filter, and certain octane fuel, stock cams, and stock bore. The ECU can be changed (via actually reprogramming or adding a controller) which is why I have a controller already to adjust and compensate positively with changing stuff out. I've already changed the intake ports, exhaust, added the additional filter under the center console. With that I added the FCM-III from Lloyds.

It's not a stretch to think that by say....removing the exhaust baffles...can have a positive affect on performance IF the fuel controller can adjust in response. I don't want to remove my baffles as I don't want the window shattering sound. BUT if the same result could be gained be removing the Catalyst instead of the baffles FOR PERFORMANCE (not sound) reasons, and still let the fuel controller adjust accordingly, then it could be an option.

Just an option....not saying I'm going to remove the Catalysts. I'm fact searching. Pros and cons.

2012 #20 NESS Vision DARKSIDE BABY!
Stage 1 w/D&D pipes + lots of Victory add ons. PC-V w/AT, Lloyd's intake, filter, ATS, & Variable Clutch.
2013 Bushtec Entourage in matching Ness color and graphics - See the PAINTED TO MATCH process
Wife rides a 2016 Gunner

LONGMONT COLORADO
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