catalytic converter

[SRehberg]

I have seen posts with trucks that have removed their cat somewhere along the line. Is there any benefit to "losing" the cat; ie. increase in mileage or lowering of exhaust temps etc? I know Dodge wants big money to replace it if it goes south, so it would look a lot better on the garage floor if it gives the truck a benefit.



Thanks



__________________



'96 2wd auto

 

[pwknapp]

Sure does make it sound good with the cat and muff at the scrap yard. Less restriction, more air through etc, etc. Didn't add gauges til after though. Sure does make it sound good as the Texas state trooper asked " what is wrong with your muffler? Your rattlin my windows, mind if I do a DOT inspection. "

 

[Blackcloud]

Removing it will give a freer flowing exhaust and it will eliminate the future problem of it getting plugged with soot,witck causes backpressure and poor performance. Loose that kitty.

 

[illflem]

I noticed no increase in power or mpgs removing my cat(s), exhaust does sound a little different especially at idle, but as Blackcloud says the cat will eventually clog up and result in decreased engine performance. You will have to remove or replace it eventually.

 

[SlyBones]

I noticed a definate sound improvement, and EGT's were lower.

 

[DR]

What year did they start using cats? Mine's a 95 and it only has a muffler and resonator.

 

[illflem]

Cats were used from '94 - '98. 5. If yours has a resonator it's because someone removed the cat and put in a resonator.

 

[**ICEMAN**]

take it off,,gut it,,put it back on!!!

 

[Forrest]

It's gone.

I had the Mopar Cat Back system on when the cat got the sawzall. The 1st thing I noticed was the exhaust got a lot louder, 2nd was quicker spool up. The sound to the passenger & your right ear went up a bunch. Time for a fix ... route the exhaust straight out the back. The noise in the cab dropped dramatically.

 

[SRehberg]

Sounds like the cat was a quick fix by Dodge to reduce the particulate matter in a quick and easy way, since the 24valve engines don't require it. I think the cat will be history; I see "test" pipes discussed for the replacement of the cat, but if it is like any other exhaust component I have ever worked on, the cat will likely have to be cut out. Has this been the general consenus of the ones removed? Thanks again to the replies.





______________________



'96 2wd auto

 

[JohnE]

Cats are coming back

Cats will be coming back to the CTD Ram. I cannot say when though. EGR will be on every Cummins diesel in the near future, too.



Detroit Diesel switched over to cooled EGR this summer on the Series 50. Cummins goes cEGR in 2002 for the ISC and ISL. All the units sold to the east have been with a catalyzed muffler, too.



Catalytic converters on a diesel do two (2) things in one (1). It reduces the particulate matter (pm) and reduces NO_X emissions. Seems the carbon reacts favorably with the nitrogen oxides.



oh well;



-John

 

[illflem]

How about this?

Originally posted by Joe G.

I got the January 2002 edition of Discover magazine today. It has an article titled "Take a Deep Breath of Platinum Dust". A study of the pristine snows of Greenland has revealed deposits of heavy metals platinum, rhodium, and palladium. Not good. The source of these heavy metals is (gasp!) catalytic converters on automobiles! Now what is the EPA going to do about this?

 

[Steve Roseman]

Bill, I'm glad you brought that to my attention No more guilt for me, I'm doing the environment a favor

 

[Prostock]

How do you tell the difference between a cat and the resonator? My 94 appears to have the original exhaust, but I don't think it has a cat.

 

[RedRamer]

The cat looks like a small muffler, torpedo shaped at the front end. Mine has one. Had a look at it this summer while changing muff and it was clean as a wistle. Haven't plated the pump yet and that might stuff it over time tho.

 

[Steve Roseman]

Tom, the catalytic converters on the trucks don't look like the ones they used to put on cars, they aren't flat.

If yours is before your muffler and has a 3 inch inlet and a 4 inch outlet, it's probably your cat. Good luck

 

[Prostock]

Is it before or after the muffler? I don't think there is anything before mine.



Did all 94's have cat's?

 

[Steve Roseman]

The cat is definitely before the muffler. If you don't have one, then someone else must have had it removed.

 

[Prostock]

I did some searches, and read on another thread that 94's didn't have a cat.

 

[**ICEMAN**]

all 94's i've seen have cats, including mine which lost it's guts.