Hilltopr76
Member
I'm considering a Thor Aria 3901 that comes with the cummins ISB XT 6.7L. Is that enough power/torque for that size (about 35,000 GVW). Supposed to tow another 10,000 lbs.
captsteve said:Nothing entry level about it. 360hp is a good amount, you won't be competing in the Indy 500 with it but it will get you up and down the mountains. Just drop a gear and enjoy the view! keep your RPM's in the peak torque range and you would do just fine.
Gary RV_Wizard said:...heavy semi's often run 40k-80k lbs with 400-500 hp engines.
Most of the time your speed over the hill is going to be governed by traffic. I have been over all the big grades in the west and never had a problem with my 300hp 5.9. The standard rule of thumb is if you can't accelerate in a gear you need to manually downshift till you can. Increasing rpm will also keep you from overheating on hills. I will run 2000-2500 rpm in whatever gear I can accelerate in some times 5th sometimes 4th and on one stretch of 12 degree hill down to 3ed but that was more because the slow truck ahead of me.Hilltopr76 said:Thanks for that encouragement. I love the coach, just wanting some experienced motor coach drivers to tell me I won't regret the lack of power/torque.
captsteve said:...keep your RPM's in the peak torque range and you would do just fine.
Gary RV_Wizard said:The Allison 3000 tranny will keep the engine running in its "sweet spot" without any manual downshifting...