Muffler tip discoulouration difference
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Road Warrior
Joined: Mar 2010
Posts: 1,505
Likes: 56
From: Vancouver Island, British Columbia
Muffler tip discoulouration difference
For several seasons I ran true duals and finally had enough of the noise. Switched to a Fullsac X pipe and after a dyno I got done a few thousand miles ago, I'm finding the left tip of my Monster Round is always very carboned, dark and oily looking. I clean it with laquer thinner and get them both back to looking new but does this mean that the tune was crappy?
I know that there is a slight difference on a catted header, but should mine be both then same?
Thanks again.
I know that there is a slight difference on a catted header, but should mine be both then same?
Thanks again.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,897
From: Bedford UK
Pipe lengths are different, either side of the X pipe, so flow through both sides is probably not the same. However neither side should be dark and oily and that suggests something isn't right, either with the tune, or possibly the engine. There is no substitute to seeing this in real life, so go back to your tuner and ask advice.
Road Warrior
Joined: Apr 2005
Posts: 1,739
Likes: 153
From: Fayetteville, NC
For several seasons I ran true duals and finally had enough of the noise. Switched to a Fullsac X pipe and after a dyno I got done a few thousand miles ago, I'm finding the left tip of my Monster Round is always very carboned, dark and oily looking. I clean it with laquer thinner and get them both back to looking new but does this mean that the tune was crappy?
I know that there is a slight difference on a catted header, but should mine be both then same?
Thanks again.
I know that there is a slight difference on a catted header, but should mine be both then same?
Thanks again.
Ultimate HDF Member
Joined: May 2008
Posts: 7,439
Likes: 884
From: 'Noke, VA
It could be that it's too rich (that's a common mistake amongst tuners). It could also be something more serious like a valve guide seal.
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Road Warrior
Joined: Mar 2010
Posts: 1,505
Likes: 56
From: Vancouver Island, British Columbia
Thanks for all the replies. So I can gather that the tune might be off but after I think about it the condition has been getting steadily worse, (maybe a valve guide seal). It only has 33,000 miles on it.
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Road Warrior
Joined: Mar 2010
Posts: 1,505
Likes: 56
From: Vancouver Island, British Columbia
Another important thing I just noticed is that my oil level is way down. I took it in for a dyno about 4,000 miles ago and their prelim check found that I was 2 quarts low and they topped it up, (so they said). I just checked it and she's about half on the dipstick. Could that much be going through a valve seal and messing up the left inner exhaust tip? It pukes a lot through that stupid SE air cleaner but I know I don't wipe up that much.
Last edited by DeneFXDWG; Oct 9, 2013 at 06:43 PM.
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