In most cases a 4 stroke V-8 Diesel used in a Class 8 truck has resulted in complete diaster. The later Mack V-8 wasn't too bad but the rest of them did not cut it.
I exclude Detroit Diesel 2-strokes from this as they are a completely different animal, no torque unless held to the governor, basically a fairly tough 8 cyl Diesel weed whacker motor...
I have been around trucks for my entire life and have seen a multitude of V-8 failures in the past 35-40 years where a manufacturer took a completely reliable engine currently in use in a genset, a bucket loader, and other industrial equipment and stuffed it in a Class 8 to offer more power.
Navistar, Cat, Cummins etc. all tried it and failed. Low reliability, high warranty failures, sleeves moving, too heavy, excessive fuel consumption, cooling issues, whatever.
I feel that a V-8 diesel is happy when it has a constant load and is up to operating temperature.
That's why they work so well in locomotive, gensets, pumps, whatever.
I have seen the generators in a hospital tested, I can't remember the time spec but they were each started and clocked as to how quickly they could go from start to full load.
I found it fascinating to watch and hear that poor cold diesels go through that test, a sound like no other!!!!
When you put one in a truck the constant load factor reduces to 50% pulling and the other 50% coasting downhill with 80,000lbs. + pushing on the crank , RPM changes due to shifting, slight overspeeding, driver idling it with 140 degrees block temperature all night, etc. They will not stand it.
A V-8 does not have the natural balance of an In-Line 6 and in a no fuel condition such as coasting at 2100 rpms it is trying to shake itself apart inside.
Do I want one in a pick-up truck??? Not on your life, I don't care how good they try to make me think it is!!!
Not a real technical explanation but the best I have this early in the morning... :-:-laf
Awesome post! Impressive how you made your points without sounding like a know-it-all pompous horses behind. Which is how Gale Banks comes across whenever he makes a point or advertises a product.