Anybody know why the 3rd gen is so much quiter than the 2nd gen? Also drove a 3rd gen w/h.o. man I laid 30-40 feet of rubber! Can you say holy Smokes*.

 

My understanding is the common rail fuel injection quiets them down quite a bit. And with 320hp stock it is a bruiser.

 

Yep, among other things, the common rail system delivers several small blasts of fuel as opposed to one injection of fuel.
This greatly reduces the bang caused by the ignition of fuel. Thus quiter.

At least, thats my understanding of it.

Rich

 

From www.cummins.com
FAQ section
http://www.cummins.com/na/pages/en/p...DB80C4A8F00000

How did you make the 2003 Cummins Diesel Engine quieter?

The key is pilot (or pre-) injection using the high pressure common rail fuel system. A small amount of fuel injected before the main ‘event’ prevents the steep rise in cylinder pressure during combustion, and dramatically cuts the clatter associated with diesels. We also added a bedplate to stiffen the block for reduced vibration. And we rebalanced turbocharger components and added a silencer to quiet the turbocharger.

 

On the throttle they're about the same. At idle they are much quieter.

 

In the cab they're about the same but rolling down the window of my '03 there is much less clatter than when I rolled the winder down on my '01 HO. The 2nd Gen trucks have more sound insulation, for obvious reasons

Vaughn

 

I luv my noisey '02 24v....can hear me coming!!

 

i could care less about quietness, it'll be loud once i have one for a couple days

 

Love the sound of my 2001. I like pulling up to lights with people talking on their cell phone and they have to roll up the window. Most of the people talking can't drive anyway so they should leave them things alone until they park!

 

HAHAHA, I love the same thing. The other day I was at the bank drive through and the car next to me was told that they were gonna have to wait until I was gone because the teller couldnt hear a word she was saying!!!! LOVE that CTD!!!

 

The pilot injection does quiet them down. I couldn't drive a quiet diesel though. I love the noise and clatter that my 01 makes. It'll make even more once the BHAF and straght pipes go in.

 

Is the 2001/2002 the loudest of the years???