MOSTLY SUSPENSIONS
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MEASURING ROLL STIFFNESS DISTRIBUTION

Using only a set of wheel scales, a tape measure, a jack, and the spreadsheets below, you will be able to determine the roll stiffness distribution.

With the car on the scales, record the readings. These values will go into the "original" boxes in the first spreadsheet. The "jacked" side can be either the right or left.

Measure and record the wheelbase and front and rear tracks for entry into the spreadsheet.

Click the "Display" button for the jack placement information.

JACK PLACEMENT

wheelbase =

front track =

rear track =

original jacked side front =

original jacked side rear =

original opposite side front =

original opposite side rear =

ANSWER:

Distance Back From Front Wheels =

Place a jack at the distance back from the front wheels indicated above and as far from the centerline of the car as is conveniently possible. Jack the car until the wheel scale values are appreciably changed. (See the example in the spreadsheet.) Record the scale readings. These values will go into the "after jacking" boxes in the spreadsheet below.

ROLL STIFFNESS DISTRIBUTION

(after jacking) jacked side front =

(after jacking) jacked side rear =

(after jacking) opposite side front =

(after jacking) opposite side rear =

ANSWER:

PERCENT ROLL STIFFNESS AT FRONT =

Enter supporting content here