2nd Gen Non-Engine/Transmission I drove a 600

[HTRDHLR]

I drove my father in laws new 04 3500 with the 600 . Dodge has done a nice job on the 3rd gen. trucks but I really like my 01. My dually with an edge ez and a dtt valve body feels like it has a lot more "grunt" than his 600 although some of it could be how "refined" the new diesel is. It is so quit that I almost thought I was driving a gasser I hope mine runs a very long time so I can keep driving it. I usually get bored with my trucks after a few years but I can honestly say that has not happened yet with my 01.

 

[EBottema]

All the interior and luxury stuff is nice at times... . but that 600 sound and the rest feels *****. really ***** to me. haha



I just like driving around and being in a loud and proud car... it makes me feel good about myself and puts me in a happier mood



erik

 

[cyborg]

How do they make the diesel so quiet?

 

[EBottema]

They use a high pressure fuel injection system similar to gas vehicles. That cuts 75 percent of the diesel noise that comes from the injection pump... The only noise thats left is the compression that the engine makes...



Technology is good but expensive to fix





erik

 

[BTowler]

From what I have read, it is done with pre-injection and timing. Our pumps put out more pressure than a gas fuel injection pump, one reason they are so expensive. Gassers are below 100 psi.

 

[HTRDHLR]

Originally posted by EBottema

All the interior and luxury stuff is nice at times... . but that 600 sound and the rest feels *****. really ***** to me. haha



I just like driving around and being in a loud and proud car... it makes me feel good about myself and puts me in a happier mood



erik

I could not have said it better ******Oo.

 

[Mundgyver]

Allot of the quietness is due to the injection of a very small amount of fuel, which ignites and then the remainder of the fuel is delivered afterwards. So what you wind up with is a very small detonations pop of initial fuel ignition followed by more fuel. In the 1st and 2nd generation trucks the whole charge of fuel is delivered via the mechanical injector and then it ignites creating the loud bang associated with the traditional diesel. At least that is the way is was explained to me.

 

[ntillm01]

Mundgyver - that exactly what happens. With the mechanical pumps (electronically controlled or rack controlled), you have no choice but to start injection and deliver the whole amount once you start.

With the electrical solenoid-type injector on the common-rail systems, you can squirt a little to get the fire lit (small bang noise) then wait until TDC then inject the rest to complete the stroke.

I've heard these electric injectors are very expensive, though. On the flip side, the high pressure pump is way less complicated. All it has to do is act like a lift pump, working at 1400 psi or better.

 

[Mundgyver]

I think you will find the injection pressure around 25,000 psi. on the common rail system, maybe more. I don't have my book infront of me, but for my truck I want to say around 22,000 psi. is what the injection pressure is. You have to be able to overcome the compression in the cylinder. This is another reason why diesels are a much stronger motor than a gasser.

 

[ntillm01]

I'll believe that. Maybe I was seeing 140MPa in my head, which works out to 23,000 psi? I know it is super high, compared to gassers. When you think about the pressures involved (compression, injection), diesel engines are incredible machines.



I looked it up, 23000 psi X 6. 895 = 158 MPa

(close... still a lot of pressure)