An empty camper shell doesn't weigh very much ejfranz
The appliances, refridgerator, stove, oven, furnace, the bathroom, shower, sink, the bed, and cabinates add a lot of weight in all truck campers... we are talking TC's here, correct?
The water tank, the black and grey tanks that it takes to have a fully functional truck camper add weight installed... and much more when in use.
In 1965 we had two sleeping bags zipped together on top of leaky air mattresses... a bassinte in the front seat for our first baby.... it was fun for a weekend... really funky after that. It wasn't a camper. Slightly better than a tent in some ways...
Functionally... a TC that allows you to stay for several weeks will be heavy... and the "stuff" that you'll haul to live in it will accumulate rapidly.
A 1/2 ton grocery getter will do well to haul a tent and everything to stay for 2 weeks.
Now back to real trucks and diesel engines.
Diesel engines, gasoline engines, or even hybride electric systems... are all good when the power is transmitted efficiently to the wheels ofany vehicle.
Any component that weakens the emgine or transmission is bad... like the spark plugs that that blow out of the Ford... or the ultra chips that wreck the transmissions...
Any of the factory installed engines will move the vehicle they are installed in if the manufacturers recommended limits are followed.
The reason your warrenty is voided when you chip or otherwize alter the drivetrain is that the educated professional engineers run many, many tests to get the maximum "numbers" out of their systems without failures.
If they can get 1 more horsepower out of the engine they do it... because they know that some people insist on bragging numbers over function numbers.
The speed limits are fixed... the frame and axels breaks if enough weight is piled on. The engineers know what they are doing... they void the experiments of the uneducated.
A truck camper isn't a weighted sled to be dragged. Ideally it is an intregal part of a very efficient syatem that can be hauled with a gasoline powered truck... or a diesel powered truck.
The reason I have a diesel engine:
I get 50% more mpg with my clean burnining Duramax... 15.1 mpg average with the truck camper loaded full time... 450 mile range with a 30 gallon tank.
It's not for bragging... it's just an engine... it's just efficient... nothing more.
Sleepy