Considering Trade from Gasser to Diesel

Hannibal wrote:

transamz9 wrote:

Sport45 wrote:

transamz9 wrote:
Iv'e said it before, twice as many RPM's is going to be twice as much wear.

Maybe if the bearing loads were the same, but they're not.

Look how fast your turbo is spinning. By your logic it should be worn out before the first oil change. But it doesn't because it was designed to run at that speed. Just like gas engines are designed to run at their operating speed. A gas engine with a 200,000 mile design life will last as long as a diesel engine with a 200,000 mile design life.

Bearings are not the only things that wear. Rings, cylinder walls, valve springs, rocker arms so on and so on. The you have transmission parts that are turn twice the rpm. A lot of gassers share the same transmission as the diesel. Are they built differently? NO

And those same transmissions are known to have far more problems behind the diesels. All that torque forced through the TC at lower rpm puts way more stress on it. Lower rpm under load also puts more stress on the crank bearings, wrist bearings and rings. Higher rpm means more air flow for cooler EGT, more oil flow for cooler bearings and less bearing pressure and less torque needed for less stress on the rings, heads and lower end of the engine and transmission. Your logic is like saying a longer lug wrench is more tiring because you have to move your arm farther.

The transmissions go because of heat build up because of lack of volume going through the cooler not from the torque. When was the last time you seen a diesel motors bottom end wear out with low miles on it because of friction? Ask me the same about a high revving gas motor.;) The high EGTs come from the amount of BTU's being put out per cycle and yes, if you use a longer lug wrench to move the lug nut at the same speed you going to tire much much quicker to do the same work in the same time frame.