DE-CAT/Crosstalk issues?
Road Captain
Joined: Jan 2010
Posts: 527
Likes: 42
From: Sequim, WA
Did you do a tune, or do you have a fuel management? Thinking of the full sac headers, but I don't want to tune if I don't have to.
Elite HDF Member
Joined: Sep 2007
Posts: 4,928
Likes: 69
From: Near Myrtle Beach, SC
Take a look at this photo:
The O2 sensors are located before the cat. Removing the cat should have nothing to do with introducing any such phenomenon. By removing the cat, you do not disturb the chambers in which the O2 sensors are located. And before you say it, back-pressure from the cat would not prevent this phenomenon even if it existed, it would more likely contribute to it!!
This is just another forum myth that was started long ago and will never die. It ain't happening.
The O2 sensors are located before the cat. Removing the cat should have nothing to do with introducing any such phenomenon. By removing the cat, you do not disturb the chambers in which the O2 sensors are located. And before you say it, back-pressure from the cat would not prevent this phenomenon even if it existed, it would more likely contribute to it!!
This is just another forum myth that was started long ago and will never die. It ain't happening.
Cruiser
Joined: Jun 2006
Posts: 129
Likes: 0
From: Houston, Texas
I'll put my .02 in here.. from the pics i've seen where they cut open the side and made a window to gut the cat there seems to be a bit of a gap between the cat material and where the pipes actually end and join into the area the cat is in.... If the "crosstalk " was such a prob then i would think that you would see it there anyway... now if I were to do it my way i'd gut the cat... then make a plate in there to keep both sides seperate from each other.. heck you could go so far as to pretty much make it a 2/2 setup by keeping them seperate in that area i would think....It's jus a thought there... anybody else think that would work pretty good???. Len
Cruiser
Joined: Mar 2012
Posts: 210
Likes: 0
From: San Antonio
Yea..I agree... I am a mechanic.. and have been for over 28 yrs... done some tuning myself... and from what i've read where some want to move the O/2's further up the pipe I think it make hurt them a bit.. as the O/2 reads what the cylinder jus did on the last firing and see's it in a certain time... we call it "injector offset" time and it knows in the ECM how long it takes from the cyl firing to when the O/2 sees it happen.. so I you move it upstream more it may cause a conflict in the tune... Len
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Outstanding HDF Member
Joined: Jan 2010
Posts: 2,916
Likes: 31
From: earth
Take a look at this photo:
The O2 sensors are located before the cat. Removing the cat should have nothing to do with introducing any such phenomenon. By removing the cat, you do not disturb the chambers in which the O2 sensors are located. And before you say it, back-pressure from the cat would not prevent this phenomenon even if it existed, it would more likely contribute to it!!
This is just another forum myth that was started long ago and will never die. It ain't happening.
The O2 sensors are located before the cat. Removing the cat should have nothing to do with introducing any such phenomenon. By removing the cat, you do not disturb the chambers in which the O2 sensors are located. And before you say it, back-pressure from the cat would not prevent this phenomenon even if it existed, it would more likely contribute to it!!
This is just another forum myth that was started long ago and will never die. It ain't happening.
Seasoned HDF Member
Joined: Sep 2008
Posts: 20,880
Likes: 33,830
When I bought my 2010 Ultra it already had Stage I air kit, download, and Rush slip-ons. I had the CAT removed and my Harley Tech said I would not need to retune which is another $150. I questioned that and they said the CAT is not very restrictive at all. It is a heat generator to burn up all of the gases before it leaves the tail pipe.
My bike runs great and the right side heat is gone.
My bike runs great and the right side heat is gone.