I am looking at upgrading the exhaust on my 07, i do not have emission testing in my state. Would i be able to remove my cat without any problems? i know there are not sensors attached so i really dont' know what it does or how it effects the way the truck runs. can someone fill me in? thank you.

 

The 6.0 does use a exhaust back-pressure sensor(I am drawing a blank, I think it is before the turbo), It most likely is used for tweaking the VGT strategy.

see post #10
https://www.ford-trucks.com/forums/3...=back+pressure

 

No drawbacks. I replaced my entire exhaust from the turbo back, no sensors, no nothing. Kill the cat. It's actually better to get rid of it. More exhaust flow= better performance and lower EGT's. Sustained high EGT's will kill your engine.

 

We have never removed a catalytic convertor and in fact have added them to all our 1996 to 2002 buses that did not originally have them, we have never found them to reduce fuel economy, power or engine life in our operation.

 

well thats good to know. do you think i'd be better off replacing it with an exhaust that has teh offroad cat delete option? you really think i'd get a little more flow out of the exhaust and lower egts?

 

so after reading this topic https://www.ford-trucks.com/forums/3...=back+pressure i'm worried that i'll lose power and fuel millage if i change my exhaust?! could that be true? take a look at the last half of the topic that i just posted the link for.

crash687 also posted it before me. i want to hear some good news about how people get more power and millage out of upgrading their exhaust!!!

 

I removed only the muffler from the stock exhaust, and my mileage is up about 1 mpg. I left the cat and everything upstream as my dealer said it would void the warranty if I modified those parts. Is your warranty important, and if so, what will your service department allow? I think you could make reasonable power/efficiency increases with just a large cat-back system. My $.02.

 

Everyone is making notes about power and fuel economy and EGTs and stuff... but not one person seems to make mention of the environment... or am I the only one that is concerned about that?

 

I plan on taking mine out, but if i have to go in for service, putting the stock one back in. i have the pipes and not that the weather is getting warmer, i can cut the muffler out and the cat. see how i like it.
i don't think taking the cat out in a diesel is as harmful to the environment as taking a cat off a gas motor. there are differences between gas exhaust fumes and the fumes from the diesel, and how they impact the environment. diesel has heavier particulates that tend to stay closer to the ground, at least, that's what i have read in more than one place, over the years, can't remember where now.

 

While I know that exhaust is bad for the environment, however, there is not the extreme problem that the enviro people are making it out to be. In fact, there have been worse instances that can be traced thru soil analysis where the environment was considerablely less hospitable then what is being made out now. Everything goes in cycles, while we might be bumping up the cycle a little bit, it is going to happen rather we are using petro fuels or go back to using horses. Now, if everybody wanted to really do away with the awful exhaust from petro fuels, then they need to move on doing some other type of fuel(such as biofuel or harnessing hydrogen(although this is a long way down the line, maybe not as far down as I'm thinking but definately farther then biofuel)). If the oil companies were smart they would try to get in on the ground floor of this niche market before someone else does it, because there is obviously a demand for it and someone sooner or later will supply it, some places though just don't look beyond this year's profit margins.

 

Yes, you are... . All of the rest of us want to kill the earth as quickly as possible!

 

I think the earth is still a safe bet to be just fine reguardless of what we do or not. Sure its all to our advantage to do our part if we can. I don't think however the stuff Al Gore and his cloney's are running around trying to scare the heck out of us to believing is at all true or even remotely true for that matter.

There are far worse things happening to our earth than what our exhaust is doing yet, they do nothing to that. It doesn't stand a chance to get the attention or make all the money from us as our vehicles will... Besides most of these other things have bigger company's behind them with major deep pockets and they sleep in the same bed as our politions do...

I don't see how in the world they have a clue as to what the weather actually was like a 1000 years ago, let alone 50,000 years. They count and study ring growth patterns of older trees and stuff like rock formations, but that is not a given to be sure of what they are purposing...

I fear its going to be like our water saver tolets they shoved on us to save water. Sure they don't use as much water alright, each time you flush the head, but it doesn't work so well either and you now have to flush the head 3 or 4 times... I like the in door plumbing guys, I just don't think making us flush the water saver heads is saving any water, nor do I think so much of the stuff they are doing on the vehicles to do the clean up of the emissions.

 

YUP!!!...All for the global warming....it gets to -20F in the winter quite often around here...dang cold.....Global warming would be a good fix but just wonder what to do when it gets +120 in the summer...hmmm?....

 

No your not the only one and I didn't think it was ok to post about breaking a federal law ?

 

Technically speaking I'm not in violation of the law because I'm exempt from testing in this state, even though here diesel vehicles aren't exempt, I am because of the sticker weight of the truck. Also the testing for that they do here in Tennessee is a joke even if I did have to go thru the center, all they do is check the port if the O2 sensors are throwing DTCs and since(unless they are on the new 6.4's) ours don't have O2 sensors(atleast not to my knowledge they are on there) so not really doing all that good. Even if they did, I know people that can program the vehicle to not show a DTC related to the cat for a period of about 120 miles before it throws the code again, just get tested within that time and your good to go. So really, the state isn't totally concerned of the environment, they just want more money and they keep the environmentalists happy by this supposed testing. Now back in Texas it's a little bit harser and more practical compared to Tn, but here it's just more money to give the state.