555 vs. 600 exhaust smell

[joe308]

My 03 exhaust smell is pretty strong compared to my 94 (normal conditions - warm weather, warmed up, at idle). Is this just a function of more fuel and improved combustion? Are the 600's with their emissions controls any better on the stink?

 

[CStansbury]

My sister-in-law said my 600's exhaust smells like Elmer's Glue . I never thought of that, but since she metioned it, it does kinda. Not so much now that is has 3200 miles on it vs. 400 when she said that.

 

[klenger]

My 04. 5 kind of smells like a propane vehicle. It's not near as strong as my 01. 5. Quieter too.

 

[Vaughn MacKenzie]

Emissions "curve"?

Joe there have been a number of posts talking about the 305's exhaust smell. It smells strong like it doesn't burn super clean or something. When I was driving around Montana at high elevation & cool weather and was following a '03 Ram the smell was very strong and almost obnoxious. And the smell of my truck after warmed up and idling was very strong.



My thought is under normal driving and idling the injection pressures are low and fuel doesn't atomize as well but it's good enough to meet emissions. At higher power levels fuel pressure is higher for cleaner burn, miniming emissions. It could be the EPA has an emissions cap instead of lowered emissions across all RPM and power levels. So it could be the HPCR system is set up to allow more emissions at low power levels but cut them at higher power levels.



Just a guess anyway



Vaughn

 

[DGFoster]

To me my 305/555 smells just like my 99 PSD smelled,kinda a sweet smell compared to the 2000 I had.

 

[phloop]

The 04. 5/600 has a cat on it which causes the exhaust to smell like an old Clark forklift instead of a diesel pick-em-up truck.

 

[KHogan]

It's hard to smell the exhaust smell over the obnoxious (& noxious) crankcase blow-by fumes coming from the draft tube (unless you put your head near the exhaut pipe outlet).

 

[RFrisch]

Originally posted by KHogan

It's hard to smell the exhaust smell over the obnoxious (& noxious) crankcase blow-by fumes coming from the draft tube (unless you put your head near the exhaut pipe outlet).

..... had my head there all day..... couldn't tell the difference after about 10 min!!!Oo.