Looking for some advice and comments - Page 2 - Fiberglass RV


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Old 03-20-2003, 07:44 PM   #15
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Paul
Good point.I never thought of it that way.:wave
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Old 03-26-2003, 04:34 PM   #16
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Bigger can be better

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
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Old 03-31-2003, 01:44 PM   #17
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45 MPH in 3rd at high altitudes up mountain passes? Shoot -- I've driven cars (including v-8s) that couldn't beat that! I remember driving a Ford van with v-8 that pulled the mountains at 12-15 mph and 5 MPG. 1st gear all the way. Brand new van, too...
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Old 03-31-2003, 07:19 PM   #18
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For those who are having problems pulling your trailers in high altitudes....the engine is starving for AIR. Remember, they don't build vehicles much different for different altitudes, just tune them different. Talk to your mechanic. It's possible all you need to do, just before you start climbing, is change the mixture to the carburetor and maybe adjust the distributor a hair. Of course, you'd re-adjust once you start downhill. And it goes without saying your air cleaner should be pristine clean.
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Old 03-31-2003, 08:43 PM   #19
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De-rate 4% per 1000 ft.

Quote:
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
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.
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