F
FT_Guest3342
Guest
I haven't gotten my truck yet (3 more weeks). But I am looking into the mileage it should get. Many have said they are getting 11-13 mpg under standard unloaded conditions. It is my understanding that Ford's intended use of the Tremor is Off-Road, and maybe towing. I think this is why they put the 4.3:1 differential gears in it. So, I have done some calculations.
I picked my average speed of 70 mph, and compared all the gear ratios. A 7.3L Tremor (w/ 4.3:1 diff and 35" tires) should turn 1828 rpm at 70 mph. That is really high rpm for cruising, and thus the poor gas mileage.
For comparison, a standard truck with 3.73 diff and 33" tires should run 1682 rpm at the same speed. It should get much better mileage. Maybe 16-18 mpg.
It stands to reason if we can get the rpm down on the 7.3L Tremor into the 1500-1700 rpm range, then the mileage should improve at cruising speeds. My calculations show that if you put 40's on a Tremor the rpm at 70 mph should be 1600.
So, by my logic, if you want better gas mileage at cruising speeds, get 40's, or at least 37's.
So is there anyone out there with a 7.3L Tremor with 37's or bigger? If so, what gas mileage are you getting at highway speeds?
I picked my average speed of 70 mph, and compared all the gear ratios. A 7.3L Tremor (w/ 4.3:1 diff and 35" tires) should turn 1828 rpm at 70 mph. That is really high rpm for cruising, and thus the poor gas mileage.
For comparison, a standard truck with 3.73 diff and 33" tires should run 1682 rpm at the same speed. It should get much better mileage. Maybe 16-18 mpg.
It stands to reason if we can get the rpm down on the 7.3L Tremor into the 1500-1700 rpm range, then the mileage should improve at cruising speeds. My calculations show that if you put 40's on a Tremor the rpm at 70 mph should be 1600.
So, by my logic, if you want better gas mileage at cruising speeds, get 40's, or at least 37's.
So is there anyone out there with a 7.3L Tremor with 37's or bigger? If so, what gas mileage are you getting at highway speeds?