why do Diesel pickup trucks have such a large diameter exhaust?

its huge compared to a gasoline pickup…

4 Responses to why do Diesel pickup trucks have such a large diameter exhaust?

  1. Michael July 24, 2010 at 3:10 pm #

    turbo pressure and 21+ to one compression ratio.
    most factory cars have 8.5 to9 to 1 compression ratio
    diesels run on fuel that needs higher compression to ignite the fuel, and that is in the mechanics of the engine. then you add15+ lbs of turbo boost, if the exhaust was small like a gas engine, it would never create the power and torque they do
    this is a good question

  2. brian d July 24, 2010 at 3:10 pm #

    because the turbo forces more air through.

  3. ken k July 24, 2010 at 3:10 pm #

    they need them

  4. tomblindewey July 24, 2010 at 3:10 pm #

    well you have to understand this a gas engine has around 120 lbs compression in the piston, and a deisel has around 1000 lbs.so it needs this large exhaust to release the pressure.