On Jun 23, 2004, at 4:12 PM, Robert Fisher wrote:
>
>     "The weight of the trailer is the most important factor. A good
> weight-to-horsepower ratio is about 35:1, 35 lbs. of Gross Combined
> Weight
> (GCW) for every horsepower your engine develops. Multiply the engine's
> rated
> horsepower by 35 and subtract the weight of the vehicle passengers and
> luggage. The number remaining is the approximate ideal maximum weight
> you
> should tow, although a numerically higher axle ratio can help
> compensate for
> heavier weight."

Semi tractor trailer trucks weigh up to 80,000 lbs and have about 300 hp..
 A ratio of 267:1!  It's all about torque, not horsepower, when towing
something heavy.

Ryan