Is Re-gearing worth it?
Hello all. My name is James. My wife and I just purchased a 2012 Coleman 274BH and we absolutely love it. It comes in at 4580 dry. Our TV is a very low mileage mint condition 2007 F150 with the 4.6...
Forum Discussion
I'm starting to see now, eh? :)
Like I said not much experience with light duty trucks but I know there is something to gear reduction occurring closer to the wheels (rear axle) vs dropping gears in the trans - at least in heavy trucks - there is probably a mechanical law somewhere - alls I know if you hook up a high geared truck to a heavy set of trailers, you will be rowin' the stick all day in hilly terrain while the lower rear axle geared truck drives away...
With our little rv trucks you do need to do what blt2ski says - make sure the final overall gearing lands you in a "useable" range for not towing situations.
On small vehicle dynos: so that's why they run the vehicle from idle to the pin and produce those swoopy curves on the graph?
Can you use one to set at 60mph tow speed and then start to load the engine until it is at whatever HP (power) output it can manage at the desired fuel rate? Then produce a result that says "your 450HP engine makes 230HP at cruise gear/speed at X lbs/hr of fuel (XX% fuel rate)... you can therefore pull a XX sq ft XX lbs trailer up a X grade..." "And if you haul with it on the 450HP pin all the time it will give you 5mpg..."
No wait, bad idea...:) eh?
Like I said not much experience with light duty trucks but I know there is something to gear reduction occurring closer to the wheels (rear axle) vs dropping gears in the trans - at least in heavy trucks - there is probably a mechanical law somewhere - alls I know if you hook up a high geared truck to a heavy set of trailers, you will be rowin' the stick all day in hilly terrain while the lower rear axle geared truck drives away...
With our little rv trucks you do need to do what blt2ski says - make sure the final overall gearing lands you in a "useable" range for not towing situations.
On small vehicle dynos: so that's why they run the vehicle from idle to the pin and produce those swoopy curves on the graph?
Can you use one to set at 60mph tow speed and then start to load the engine until it is at whatever HP (power) output it can manage at the desired fuel rate? Then produce a result that says "your 450HP engine makes 230HP at cruise gear/speed at X lbs/hr of fuel (XX% fuel rate)... you can therefore pull a XX sq ft XX lbs trailer up a X grade..." "And if you haul with it on the 450HP pin all the time it will give you 5mpg..."
No wait, bad idea...:) eh?
