Is there a high flow CAT that dodge approves on 2006 RAM?

[RankRam]

A couple of notes. 1) I dynoed my '05 with and without the stock cat and it put down 345hp both with and without it. Each time we ran it at least 4 pulls just to make sure we had a good reading. We were surprised to see no increase in power w/o the cat but the truck didn't feel any different driving either so the numbers seem accurate.



2) I've bought several "high flow" cats for my cars and I have yet to see one that's any different than a stock cat converter. The only difference is in the brick/body size. There are some "true" high flow cat converters but they cost around $2000.



Save your money, the stock diesel cat is absolutely huge anyway and will flow plenty of air. The only time I'd worry about it being a restriction is if you're at 450whp or higher and then I'm only guessing that it's a restriction. It's not a restriction at 350whp anyway. Also, I only see a difference in egt of "maybe a maximum" of 50*F pre-turbo between cat/no cat. I expected to see bigger egt relief without it but it just didn't happen, even pulling rocky mountain passes.

Thanks for the information, I sure would like to know how much restriction the stock muffler creates! I have seen inside the cat and it doesn't look bad at all. Now the muffler that's another story. :-laf

 

[Tinman]

I've been curious as to how effective the cat is once timing/duration(and maybe pressure) is changed. The 3rd shot of fuel is there for the cat, so I would assume that anything that effects fueling would effect the cat. At what point (either in hp or duration or whatever) does the cat become worthless? I'm all for leaving it there as long as it doesn't harm performance or become ineffective.

 

[tsi_2baad4u]

I've been curious as to how effective the cat is once timing/duration(and maybe pressure) is changed. The 3rd shot of fuel is there for the cat, so I would assume that anything that effects fueling would effect the cat. At what point (either in hp or duration or whatever) does the cat become worthless? I'm all for leaving it there as long as it doesn't harm performance or become ineffective.

I had injectors to get me to 345whp so I can't say what timing advance will do. I have a TST on now as well but haven't tested it on the dyno yet.

 

[BRayls]

anyone put the stock one on a flow bench to see how much air it flows first?

 

[Vaughn MacKenzie]

why not just leave it on? Here is why I leave it alone. If not for us, why not for our kids?



Edit: But to answer the original post, Here is one place that sells them. All the way up to 12" inlet sizes!

I really like this comment from Catalyst Products' site:



"Diesel engine exhaust gas contains many constituents that are considered harmful to humans. Our high quality diesel catalytic converters (diesel exhaust gas purifiers) are designed and specially formulated to remove or reduce the harmful components while keeping pressure drop to a minimum. Our standard units can provide over 90% reduction in carbon monoxide (CO) emissions, plus high reduction levels of unburned hydrocarbons (UHC), aldehydes (the odor causing component in diesel exhaust), as well as diesel particulate matter (DPM). "



What's wrong with that statement? It comments about the harmful components of diesel exhaust, then the first two things they list (Carbon monoxide and unburned HCs) are less of a problem on a diesel than on gassers



I thought the big problem on diesels besides soot is NOx, which it doesn't even mention