Emissions/Cat - question
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Elder User
Joined: Jun 2004
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From: near Daytona
Emissions/Cat - question
Has anyone gutted their converter and passed a emmision test? Does a cat actually do that much on a 6.0?
I want to delete it but I dont want to deal with replacing it when emmisions are due.
I want to delete it but I dont want to deal with replacing it when emmisions are due.
Cargo Master
Joined: Jun 2003
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From: Carlsbad, California
Removal of the Cat hasn't been shown to do much to improve performance. Conversely, leaving the Cat in isn't hurting performance much if at all.
I don't know if any states are currently requiring smog testing for diesels. California will in 2007 but I haven't heard that this will be inflicted upon pre-2007 trucks.
I don't know if any states are currently requiring smog testing for diesels. California will in 2007 but I haven't heard that this will be inflicted upon pre-2007 trucks.
Former Vendor
Joined: Mar 2004
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From: Hendersonville, NC
If you want rid of the cat, but are worried about it, all you need to do is split the cat down the middle with a plasma cutter, remove the internal mesh, cut off the ends of the cat to fit whatever diameter exhaust you have, slip it over the straigth pipe in the center, reweld the halfs together, and weld it to the pipe 
There is NOTHING they can do on that one
There is NOTHING they can do on that one
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From: 3rd Rock
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Elder User
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NewYork has emissions testing on 6.0, they use California emissions standards
Originally Posted by darylhunter
Removal of the Cat hasn't been shown to do much to improve performance. Conversely, leaving the Cat in isn't hurting performance much if at all.
I don't know if any states are currently requiring smog testing for diesels. California will in 2007 but I haven't heard that this will be inflicted upon pre-2007 trucks.
I don't know if any states are currently requiring smog testing for diesels. California will in 2007 but I haven't heard that this will be inflicted upon pre-2007 trucks.
Posting Guru
Joined: Sep 2003
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From: Florida Hill Country
Originally Posted by 3/4ER
NewYork has emissions testing on 6.0, they use California emissions standards
Senior User
Joined: Jan 2004
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From: Medford, Oregon
There are a few places out there that are testing diesels, mostly for particulates. Its my understanding (& I may have it wrong), that the cats are there because the egr intoduces oil back into the exhaust stream, creating a sooty condition. When the cat heats up, it gets hot enough to burn off this soot.
Just remember, it is a violation of federal law to modify an installed emissions control system. And its just going to get stiffer, & more comlicated in 07. (Try a rechargable Nitrous Oxide scrubber).
Just remember, it is a violation of federal law to modify an installed emissions control system. And its just going to get stiffer, & more comlicated in 07. (Try a rechargable Nitrous Oxide scrubber).
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Elder User
Joined: Nov 2003
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From: Southern California
California Diesel Smog Testing
Fm 3/4ER
NewYork has emissions testing on 6.0, they use California emissions standards
NewYork has emissions testing on 6.0, they use California emissions standards
Fm rlh
But Cali doesn't actually test diesels.
But Cali doesn't actually test diesels.
Elder User
Joined: Nov 2003
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From: Colorado
Colorado does have emissions test on diesels. It cost ~$45.00 per year, they put your vehicle on a dyno and do a low speed and high speed run. It's kind of neat, it will give the rear wheel horsepower after the runs. Sorry I can't give you any more info on the particulars. I now register mine as a farm vehicle which makes it exempt.