Quote:
Originally Posted by Maxbumpo
Please sell me your catalyst!
Mine rusted out (124.131), I decided to kludge together an aftermarket catalyst rather than pay $1600 or more for a star-marked part from the dealer. My entire exhaust system had holes, so now I've got all aftermarket parts in there, and they do a terrible job of keeping the engine noise down. The car really sounds like it has an exhaust leak, but neither I nor my Indy could find one, so I blame the non-factory exhaust system.
While trying to decide on a solution, I drove the car for several months with no cat. I could not detect any increase in power or MPG. MB put some work into designing these, keep the cat and be happy.
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Interesting. I've read people who've dumped the ox-cats on these exact cars have had great luck doing so, both from power and MPG, while adding very little exhaust noise over the stock configuration. I may give it a try this summer, but I do plan on keeping my stocker in case I have to re-install it. My car was a biodiesel victim before I got it, of course since I've had it it's been nothing but pump diesel with regular doses of Diesel Kleen sprinkled in for good measure.
I've read here-and-there that "home brewed" biodiesel (which my car had) is a gamble and can clog up diesel cats, at least that was the case with the 7.3 Powerstroke boards I used to frequent, so I applied the same logic to the MBZ diesel cats (although I do suspect they are slightly better engineered). I did have good luck ditching the cat on my 7.3; ZERO increase in emissions with the annual snap tests and it ran lower EGT's towing and definitely picked up some HP and MPG's.
Only one way to find out.
