Have our trucks got too much power yet?
I've often thought about all the energy being wasted with braking applications and exhaust braking on down grades. It's only a matter of time before our rvs will have electric drive axles to help hold...
Forum Discussion
4x4ord wrote:
^^^^ You may be right that the difference in mpg cruising down the highway might not be "that much". It would probably be 10% and overall mileage would be affected by about 15%. So in my case if I owned a smaller engine truck for 10 years I could expect to save $5500 .... I don't think it would pay for the electric axles I would want on my RV if I had the smaller engine.
Going from 5.0l to 6.7l in the same truck...I would be very surprised if there was a 10% improvement. I'm thinking more like 2-3%...maybe none.
Even empty both engines are far enough into their power bands that efficiency won't be greatly different.
