Diesel vs gas......................
OK folks, there have been a few to many diesel vs gas threads that have shall we say gone to "Hell and a hand basket"! So if all of you would put in you BEST, no flaming reasons for going gas vs diese...
Forum Discussion
waynec1957 wrote:
Ok fellas, help me out here.
I'll take a shot at it.
From around '04.5 the Dmax uses a VVT (variable vane turbo) that restricts air through the turbo and acts as a exhaust brake. Programmed with the Allison which keeps the TC clutch locked which stops the slippage in the TC. Early models were called grade braking but were very weak when compared to a actual exhaust brake. The new '10 ?? and up Dmax/A with the VVT uses a very aggressive program and is at the top with the Dodge in turbo exhaust braking.
As far as I know the 6.0 gasser doesn't use or advertise a grade braking feature.
This from a engine braking wiki;
The term engine braking usually refers to the braking effect caused by the closed-throttle partial-vacuum in petrol (gasoline) engines when the accelerator pedal is released. While some of the braking force is due to friction in the drive train, this is negligible compared to the effect from the vacuum.
When the throttle is closed, the air flow to the intake manifold is greatly restricted. The concept can be illustrated by the amount of effort required to blow/suck through a thin tube vs. a thicker one. It is the work the engine has to do against this restricted air flow that provides the braking effect.
Who advertises a smart exhaust brake ?? I've heard of smart brake and a speed brake.
