Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

What makes the diesel noise?

Discussion in '1982-Present GM Diesel' started by pismorat, Feb 27, 2003.

  1. pismorat

    pismorat 1/2 ton status

    Joined:
    Oct 29, 2002
    Posts:
    540
    Likes Received:
    2
    Location:
    California
    My dad and I are wondering what it is that makes that awesome diesel noise. /forums/images/graemlins/truck.gif /forums/images/graemlins/ears.gif /forums/images/graemlins/burb.gif
     
  2. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    Are you talking about the loud throaty exhaust or the actual engine noise?

    Diesels have noisier exhaust because they push a lot more air through the system and generally have less exhaust restrictions.........
     
  3. arveetek

    arveetek 1/2 ton status

    Joined:
    Mar 1, 2002
    Posts:
    722
    Likes Received:
    0
    Location:
    Granby, MIssouri, USA
    The diesel rattle is caused by the high compression (21:1 for the 6.2L) and strong ignition pulse. What you are hearing are structural vibrations induced by extremely rapid pressure rise rates. The differences in diesel noise from one diesel to the other has to do with style of fuel injection, mostly. Our indirecet injected diesels (6.2L/6.5L, Ford 6.9L/7.3L) are typically quieter than the direct injected styles (Powerstroke, Cummins 5.9L). However, newer technology on the latest Duramax 6.6L and Cummins 5.9L make them extremely quiet for being direct injected. The technology involves injecting a small amount of fuel to begin the burning process before injecting the main fuel charge.

    Casey
     

Share This Page