Orginally posted by Nancy Wolf
Paul, we just bought a Scamp 5th Wheel. *It weighs around 2,000 to 2,500 pounds. *Our manual, 3-liter, V-6 engine Mazda truck is SUPPOSED to pull up to 4,000 lbs. *This truck does pull it up mountains at high altitudes but only at about 45 MPH and in 3rd gear. *At lower altitudes it pulled hills much easier. *Personally, I didn't notice a problem with pulling a trailer with a manual transmission. *Shifting gears kept us awake. *:r *
Nancy, an engine is ''de-rated'' 4% for each 1,000 ft. of increase in altitude. That doesn't mean much when you are going from sea level coastal Oregon to perhaps 3 or 4,000 ft. But you were probably traveling at 7,000 ft. or higher when you crossed the Rockies last week. You had about 28% less horsepower than when you're towing in your home area. Keep that in mind when you're shopping for a new tow vehicle (as you said you might be doing), particularly if you're goiing to be in the mountains frequently. The computers in modern vehicles adjust and compensate for aspiration, but the power reduction is still a fact.