2006 Cummins catalytic converter

I am with you, I tend to leave stuff stock if it is adequate but you cannot tell some guys that. My 99 NEEDED some help so it got chip and 4 inch exhaust. his probably don't but it is his to F up any way he wants. I would appreciate any more advice. THANKS

I just wish I could afford a payment on a new one....when the 6.7 CTD comes out, I will find a way.....like pack the old bag's bags.

The 6.7 is rated at basically the same output as the 3rd gen. 5.9 so until some aftermarket gurus figure out how to eliminate the cat and scrubber without smacking making down the computer you're better off with a '04.5, '05, 06 or early '07. Take the cat off of the '06 and drive it for a while. Then, if you want more, spring for an EDGE EZ. It will give 3 settings above stock with more hp and torque plus around 10% better fuel mileage. The EZ will actually reduce your EGT because of the increased power so unless you're pulling max loads, max grade at summer temps you don't need gages. The most I've seen on my '05 6-speed was 1300F on #3 (+65 hp and 170 lbs/ft) at 60-65 mph, 5-6 % grade, 85 deg ambient temp and grossing 22,300 pounds. The upper section of this pass is tight enough that 50-55 mph is more do-able so when I downshift to 5th the EGT drops bigtime.

• DTO

Here's a comparison of Cummins (rated Medium-Duty Diesel as used in Dodge RAMS) and GM/Ford (rated Light-Duty Diesel as used in their pickups) connecting rods. The link is a cure for your Ford. :->

• FordCummins

I saw your photo and see that the cummins connecting rod is longer. Don't wanna start a cummins, powerstroke, duramax war but how does this show the difference between a medium duty, and light duty diesel ???

I am not a mechanic by any stretch of the means so I am just asking for curiosity / knowledge about diesels.

Scott

When it comes to connecting rods and engine internals wouldn't a 6 cylinder @ 5.9 liters have to have bigger components ( cylinders, rods, valves ) that a 8 cylinder that same size or even bigger because you are making xyz HP with 6 cylinders vs 8 which causes more stress on the components themselves.

I think though you need to look at your torque numbers again for the duramax. It makes makes max torque @ 1600 RPMS.

I do agree with you though that GM shouldn't put all of there eggs in Allison basket but it is a awesome transmission. People who ride in my truck always comment how smooth it is and how you can't even feel it shift.

In my eyes if it was a perfect world you would have a ford body, cummins engine and a allison tranny. Maybe in another life I guess.

Scott

• Duramax Info for 2007

• Dodge/Cummins 6.7 CTD HP & Torque

Thanks for the adult conversation. It seems like some people in this world beleive what they beleive but when you ask them why there *anties get into a wad.

I have always heard that the straight six cummins had more "grunt" than a duramax or powerstroke but I really never got a good explanation. I have heard the term "square" and "over square" from one of the guys at one of the other tractor boards that I frequest. He always says the death of ford tractors is when they started producing square engines.

Hopefully 2007 will be a turning point for diesels in the U.S. It seems like DCH / Mercedes has there act together on there diesels they are producing.

Take Care,

Scott

P.S If you are ever driving down 71 north of columbus ohio give me a holar and maybe we can meet up for some cold ones and talk some more about engines and trucks.

I have a 06 duramax and I know that you cannot take the kitty out or it will throw a code and the engine will run like crap or not run at all. I believe any diesel engine after 2003 has too meet certain EPA regs and that is done easiest with a catalytic converter.

As others have said I personally would just leave it alone until it falls off but that is just me. It guess it is human nature to tinker with stuff.

Scott

• TDR

Guess you can't have the best of both worlds all of the time.

Scott