De-Catted 2011 Road Glide Ultra
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Joined: Mar 2009
Posts: 73
Likes: 0
From: Orleans Ontario Canada
I've seen o2 spacers for automotive set ups. Would this work on the HD's. Backing out the sensor would give a leaner reading,would it not, then ECM would richen? Please correct me if I am wrong.
Also
I currently run stock AC, a decatted 2010 flhx with SE slip on, with a monster baffle in the headpipe for a little better sound, and create some backpressure for o2 readings.
Also
I currently run stock AC, a decatted 2010 flhx with SE slip on, with a monster baffle in the headpipe for a little better sound, and create some backpressure for o2 readings.
Outstanding HDF Member
Joined: Sep 2010
Posts: 2,183
Likes: 4
From: Fennario
I always thought any time you do something that alters the air/fuel mix you need to address it...
I have an '11 Road Glide Ultra (true... it's not my friend's scoot). I got rid of the cat - replacing the head pipes with Power Duals. Mated them with Monster Ovals. Added a PM Super Gas to bring in more air. Using a SE Super Tuner. Have only done a couple rounds using Smart Tune and it runs very well. Last adjusted the tune about 5,000 miles ago.
Eventually I'd like to spring for some dyno time, but for now it runs great.
I have an '11 Road Glide Ultra (true... it's not my friend's scoot). I got rid of the cat - replacing the head pipes with Power Duals. Mated them with Monster Ovals. Added a PM Super Gas to bring in more air. Using a SE Super Tuner. Have only done a couple rounds using Smart Tune and it runs very well. Last adjusted the tune about 5,000 miles ago.
Eventually I'd like to spring for some dyno time, but for now it runs great.
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Joined: Mar 2009
Posts: 73
Likes: 0
From: Orleans Ontario Canada
I have been reachearching like everyone but experience I guess is best.
I have ran 3 tanks of gas with a gutted CAT. Stock AC and SE slipon.
My reserve mileage on the trip computer is giving me 25 to 30 miles more per tank. I am assuming this means a leaner mixture is involved.
I have a temp lazer gun and have been using it everytime I stop. The temps of the front cylinder, exhaust flange, block, the sensor itself are cooler than the rear and I mean quite a bit difference. Rear exhaust temps are 300 and front 240. The sensor it self has a big difference and they are bolted close to each other. The rear header is bluer.
The rear spark plug is leaner than the front.
Anyhow you get the picture.
From my experience ( and I admit not even being close to an expert on the subject)
removing the CAT leans out the bike more. Is this cross talk related or simply the sensors reading less or more O2 because the CAT is gone,,,I don't know.
I ordered an FL-vied-10 but everything being equal. If the rear is leaner than the front because the ECM is getting difficult readings, they will both be richer but the rear will still be leaner.
I got a spare header to test de catting, that was cheap and the Vied is not expensive either so I can sell it. In my opinion you go big or go home.
I will probably re-install my Cattted header, since the bike is under warranty.
If I do someting it will be the whole kit. Headers,AC, PCV or other, ect.
go FUELMOTO or stay stock, but don't poke it with a stick
These part time ideas seem irregular. I read posts that say no CAT no problems. Did they read temps,read plugs, figure mileage?
Like I said I am no expert and am not judging anyone elses ideas. I am simply trying to show my results and experiences.
I welcome any responses. I am always willing to learn more.
I have ran 3 tanks of gas with a gutted CAT. Stock AC and SE slipon.
My reserve mileage on the trip computer is giving me 25 to 30 miles more per tank. I am assuming this means a leaner mixture is involved.
I have a temp lazer gun and have been using it everytime I stop. The temps of the front cylinder, exhaust flange, block, the sensor itself are cooler than the rear and I mean quite a bit difference. Rear exhaust temps are 300 and front 240. The sensor it self has a big difference and they are bolted close to each other. The rear header is bluer.
The rear spark plug is leaner than the front.
Anyhow you get the picture.
From my experience ( and I admit not even being close to an expert on the subject)
removing the CAT leans out the bike more. Is this cross talk related or simply the sensors reading less or more O2 because the CAT is gone,,,I don't know.
I ordered an FL-vied-10 but everything being equal. If the rear is leaner than the front because the ECM is getting difficult readings, they will both be richer but the rear will still be leaner.
I got a spare header to test de catting, that was cheap and the Vied is not expensive either so I can sell it. In my opinion you go big or go home.
I will probably re-install my Cattted header, since the bike is under warranty.
If I do someting it will be the whole kit. Headers,AC, PCV or other, ect.
go FUELMOTO or stay stock, but don't poke it with a stick
These part time ideas seem irregular. I read posts that say no CAT no problems. Did they read temps,read plugs, figure mileage?
Like I said I am no expert and am not judging anyone elses ideas. I am simply trying to show my results and experiences.
I welcome any responses. I am always willing to learn more.
Advanced
Joined: Mar 2009
Posts: 73
Likes: 0
From: Orleans Ontario Canada
WELL WELL...
I removed my SE slip on which was shorter than the stock 2 in 1 slip on. Bassani make an adapter so you can use it on a 2 in 1.
I don't know if its the backpressure or reversion or even '' the swirl'' that is different.
So stock AC decatted headpipe and stock 2 in 1 slip on. She works great. No more pinging temps went down( still plenty hot) although the rear is still hotter than the front. Rear plug looks better than yesterday. Lots more bottom end and great power.(my seat of the pants dyno.)
I am assuming the longer slip on absorbs the exhaust in a way the the sensors reads better. I still will install Xied. In my opinion decatted headpipes must be all stock set up at the very least. A tuner is the best but I can live with Xied.
Temperature difference between front and rear was not as great as my last post. Although from what I can measure its in the 280's still to hot.
I would recommend, using a lazer temp gun its great. As soon as I pull in I can measure temps all over the engine and see different readings front to back and all over. The 2 sensors themselved are 30 degrees difference. The rear one hotter than the front. And they are bolted 1 inch apart. The area where the CAT was is 100 degrees cooler than the front part of the header where the sensors are screwed in. That area does however have thicker metal. Decatting does cool.
Once I have the Xied installed and lowered the close loop temps ( a little hopefully) I'll post the results.
I removed my SE slip on which was shorter than the stock 2 in 1 slip on. Bassani make an adapter so you can use it on a 2 in 1.
I don't know if its the backpressure or reversion or even '' the swirl'' that is different.
So stock AC decatted headpipe and stock 2 in 1 slip on. She works great. No more pinging temps went down( still plenty hot) although the rear is still hotter than the front. Rear plug looks better than yesterday. Lots more bottom end and great power.(my seat of the pants dyno.)
I am assuming the longer slip on absorbs the exhaust in a way the the sensors reads better. I still will install Xied. In my opinion decatted headpipes must be all stock set up at the very least. A tuner is the best but I can live with Xied.
Temperature difference between front and rear was not as great as my last post. Although from what I can measure its in the 280's still to hot.
I would recommend, using a lazer temp gun its great. As soon as I pull in I can measure temps all over the engine and see different readings front to back and all over. The 2 sensors themselved are 30 degrees difference. The rear one hotter than the front. And they are bolted 1 inch apart. The area where the CAT was is 100 degrees cooler than the front part of the header where the sensors are screwed in. That area does however have thicker metal. Decatting does cool.
Once I have the Xied installed and lowered the close loop temps ( a little hopefully) I'll post the results.
Tourer
Joined: Jul 2011
Posts: 299
Likes: 1
From: Ct.
I call foul on the o2 sensor crosstalk debate.
Those of you that have cut the pipe open with a hatch style cut - for lack of better word - know that the converter material starts about 1" after the first weld, and that the o2 sensors are located 3" before the weld. So that already makes at least a 4" void that exhaust gasses can already hang out in.
Basically what Im sayin if you look at the picture (courtesy JCturbo and his thread) you will see a void already exists, and there is no way that crosstalk doesnt already happen.
**** while were at it, aren't we saying basically that the rear head is the one getting messed up, cause its the one that not "separate"? Hmm maybe the moco already knows about the crosstalk and the lean condition, and that is why they installed the engine temp management system?
Come on guys put two and two together....
I did mine 1000 miles ago, I have not one problem....
Those of you that have cut the pipe open with a hatch style cut - for lack of better word - know that the converter material starts about 1" after the first weld, and that the o2 sensors are located 3" before the weld. So that already makes at least a 4" void that exhaust gasses can already hang out in.
Basically what Im sayin if you look at the picture (courtesy JCturbo and his thread) you will see a void already exists, and there is no way that crosstalk doesnt already happen.
**** while were at it, aren't we saying basically that the rear head is the one getting messed up, cause its the one that not "separate"? Hmm maybe the moco already knows about the crosstalk and the lean condition, and that is why they installed the engine temp management system?
Come on guys put two and two together....
I did mine 1000 miles ago, I have not one problem....
removed mine on my 2011 flhx, took it for the first rides over the weekend without the cat. i didn't notice much difference in sound, though my buddies say they did. i also didn't notice any ill effects. the only thing i noticed at all was my leg not burning up anymore. i already had a ventilator a/c, jackpot mufflers, and a pcv. maybe that's the difference.
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Tourer
Joined: Jul 2011
Posts: 299
Likes: 1
From: Ct.
removed mine on my 2011 flhx, took it for the first rides over the weekend without the cat. i didn't notice much difference in sound, though my buddies say they did. i also didn't notice any ill effects. the only thing i noticed at all was my leg not burning up anymore. i already had a ventilator a/c, jackpot mufflers, and a pcv. maybe that's the difference.
Advanced
Joined: Mar 2009
Posts: 73
Likes: 0
From: Orleans Ontario Canada
Since going back to stock slip on it runs better, I have no fuel management tuner .
I now agree decatting is not a sensor issue that much but reversion may and that is ''may'' be a little. I had slight decel pop with a slip on. With stock none. But generally I have no problems.
I now agree decatting is not a sensor issue that much but reversion may and that is ''may'' be a little. I had slight decel pop with a slip on. With stock none. But generally I have no problems.