How fast do you drive your Class A?
I'm curious what others have found to be the magic point between rig capability, speed, and fuel efficiency. I'm not talking about when you are sauntering along just enjoying the scenery, but rather w...
Forum Discussion
mama.sylvia wrote:
Great comments and very helpful, thank you all!I particularly liked comparing your preferred speed with your rig for those of you who give it in a sig.
> 55 MPH feels dangerously slow on a 65 MPH highway
DH starts nagging me to turn on the emergency blinkers at that point. I ignore him. ;)
> Look at the engine specs for your rig. What is the point where you have best torque?
I am not sure what you mean, can you explain?
ETA: My underpowered DP was a Fleetwood Bounder, 34' - don't remember the year but probably 90-something. Good rig except for poking along.
Yes my rig is "vintage" (what a great alternative word to plain "old" lol) but I'm interested in what drivers of different types of rigs drive, and the responses here have been very instructive!
There's a torque curve. What this means is your engine is making the best amount of torque at a specific RPM. In this case at highway cruise ... The engine RPM that will produce the most torque ( power to the wheels making you move). At that " sweet spot" your likely to get the best MPG and less transmission searching. The engine isn't lugging or over working.
https://cumminsengines.com/isb67-medium-duty-truck-2013#overview
Go to ratings on this link. You'll see that at certain Rpms the best torque spec. Mine is right around 1750 - 1800 rpm. So that's about 65 mph. Less rpms your lugging - more - your burning more fuel and hotter temps, etc.
