4x4 Vans : Quigley Motor Company, Inc. > Technical Center > Ford E-Series Tech Center > Turning Diameter

Turning Diameter

Ford E-Series

What happens when you change from Ford's twin I-Beam front suspension to a solid axle? One thing that happens is the turningcircle gets larger. This means your turns are not as tight as they once were.

The diagram on this page illustrates how turning diameter is calculated, and the table shows that for a given wheelbase, the Quigley 4x4 conversion gains about 1.5 feet on average. The left turning diameter and the right turning diameter are not always the same; therefore you must calculate it as an average of the 2 turns.

MODELS WHEELBASE TURNING DIAMETER (ft.) 1
QUIGLEY 4X4 FORD OE VEHICLE
CURB-to-CURB WALL-to-WALL CURB-to-CURB WALL-to-WALL
E-150 138 49.4 50.9 48.6 50.1
E-250 138 49.4 50.9 48.6 50.1
E-350 SRW/DRW 138 49.4 50.9 48.6 56.2
E-350 DRW 158 55.6 57.0 54.8 56.2
E-450 158 55.6 57.0 54.8 56.2
E-450 176 61.1 62.6 60.3 61.8

(1) Turning diameters are averages of left and right turns with standard tires.