I would have to say for just the 4.7 in the ram is quite the little motor. I just got back from a camping trip witha full load in the back, quad cab, and a load in the bed, and towing a little trailer. I had a dirt bike and an ATV, with cargo, towing a a small trailer with another ATV on it. I had to go up the cajon pass here in California and it made it just fine, i am not sure what grade it is. I got to play around on an RTI ramp, for those of you who know what that it, my stock 2WD ram scored a 379 which was alot more than I was expecting. Here are some pics.


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yea nice job, i agree the 4.7 is quite a little motor, i had to go the the county dump to drop off some stuff after we cleaned the garage (we filled my 8ft bed pretty well) and the dump for household stuff was on the top of the hill. my ram went up it like a champ barely had to even give it gas to get it to move and when it got a little wet and you could feel the rear sink a little just gotta give it some more gas and no more problems but well thats my little story with hills in my 4.7!!

Ram's Rule

 

Please explain RTI ramp, and some sort of scoring??????

 

Here i got this off of http://www.4lo.com/calc/rticalc.htm

Ramp Travel Index is based on climbing a 20 degree ramp with one tire while keeping the trailing tire in line. At the point where any tire begins to lift into the air is where it's calculated. Measure from the bottom of the ramp to the center of the bottom of the tire (use a plumb from the hub to find center). This distance traveled in inches is divided by the wheelbase in inches and multiplied by 1000. What this gives you is a percentage of travel up the ramp in relation to your wheelbase. Basically if your wheelbase is 100 inches, and you travel 75 inches your RTI will be 750 (75% or .75 X 1000).

Since this is based on math we can use a formula to estimate your RTI. The trick is to get one tire off the ground while the other three remain touching the ground. Then measure from the bottom of the lifted tire to ground. I've seen forklifts being used, climbing up a steep rock face, even climbing stairs. I suppose you could climb different things and use the calculator to find the RTIs. Then take the average of all. In any event, if you're curious I've provided a calculator that will get you an idea of your RTI. Anything above a 500 is great, there are a few rigs out there that can do perfect 1000's or better. How will you do?


Formula used
RTI = Tire Height/sin(20*PI/180)/Wheelbase*1000
Inches Traveled = Tire Height/sin(20*PI/180)



I have read that s tock power wagon can do 655 wich is good. We have a 97 Jeep that can get a 970, almost a perfect score.