I'm putting in a new 350, Th700R4 trans with .7 on the 4th gear, a 9" Ford rear end with 3.5 gears and Michelin 235 65/R17's. Should turn 2,000 RPM at 70 MPH.
My calculations confirm you estimates.
Speed at 2000 is 70 mph.
Tire width is 9.3 inches.
Tire height is 29 inches.
Results Table
RPM Speed
1,000 35 mph
2,000 70 mph
3,000 106 mph
There are two factors that produce the great mileage many modern cars and trucks get, the first is reduced engine speed, but the second is advanced engine management that allows turning the motor slow efficiently. What kind of induction or engine management do you plan to run?
