Catalytic Converter Removal!

[Mullet Miller]

IS there any benefit?drawback from removing the cat from a 95 6.5 TD?

[MTTwister]

Evidently the Cat is basiaclly a Soot Trap. When clogged, you go blow it out..( paraphrasing the service manual )

Serves no useful purpose in real life. However, is you have emissions inspections, sometimes they do a 'visual' to see the the cat is hangin' there. If So, second best is to Gut the Cat ( versus skin it).

Planning on doing that to mine, as eventually i might be in AZ, and not srue how anal they are on the Cat, versus just tailpipe emissions.

[Dvldog 8793]

I would say that LEGALLY you have to keep that horsepower converter on there! :rolleyes: However it probably would be a good idea to make sure it works by removeing and replacing it with a straight pipe. This will tell you if it is plugged and let you know just how much power/mileage it is robbing. This normally takes about 400,000 miles to determine. :D ;)
Do a search on exhaust systems on this page and you'll find lots of great advice and facts.
L8r
Conley

[pannhead]

i've been on Dlvdog's plan for quite awhile :D

[The Gunny]

I have also been on the Dvldg plan, one of the best things I did was skin that cat. The only areas in Arizona that presently do emission testing are Phoenix and Tucson, the rest of the state is wide open!

[Iceman222]

I had a back pressure test on mine last week and found that there was a back pressure of three on the converter. Really not clogged. But I removed it and the muffler. I installed a strait thru muffler. Wow what a difference.

[MTTwister]

Robert W Cooper - The folk's place is in Sun City - guess I'll call that Phoenix and plan accordingly.

[The Gunny]

MTTwister, yes that unfortunatly is part of Phoenix.......sorry for the bad news. You can check the Arizona MVD web page and it tells you what the requirements and testing procedures are.

[tom.mcinerney]

Iceman!
More on that backpressure test! Did they (who?) drill into cat inlet tube? Was that 3 PSI? Was measurement done at idle? on dyno?

[TurboDiverArt]

Didn't do a backpressure test on mine. Original CAT and exhaust and 120K on the truck. I "cleaned" the CAT out and picked up 1.5 MPG.

Art.

[lupey6.5]

down pipe-no muff-no cat-3"out-all that :rolleyes:

[TurboDiverArt]

Originally posted by lupey6.5:
down pipe-no muff-no cat-3"out-all that :rolleyes: Certainly the best solution. I'll eventually get around to replacing that dented sewer pipe they call a DP and exhaust....

Art.