M/T Tech Info

M/T Tech Info

Instructions for filling out Chassis Analysis Info

(1) Car CenterLine to tire centerline at ground. Measure from the car centerline to the centerline of the tire at ground level.

(2) Car CenterLine to lower A-arm front pivot. The A-arm pivot is that point which attaches the lower A-arm to the frame. On cars which have two lower A-arm attachment points, question 2 asks for the measurement to the front (most forward) pivot, and question 3 asks for the measurement to the rear pivot. If the car being measured only has one attachment point to the frame, the input valuefor question 2 and 3 will be the same. Be sure to measure to the very center of the attachment point pivot.

(3) Car CenterLine to lower A-arm rear pivot.

(4) Car CenterLine to lower A-arm ball joint.

(5) Car CenterLine to upper A-arm front pivot.

(6) Car CenterLine to upper A-arm rear pivot.

(7) Car CenterLine to upper A-arm ball joint.

(8) Car CenterLine to inner tie rod end.

(9) Car CenterLine to outter tie rod end.

(10) Car CenterLine to A-arm spring mount.

(11) Car CenterLine to A-arm shock mount.

(12) Car CenterLine to A-arm sway bar mount.

(13) Ground to lower A-arm front pivot.

(14) Ground to lower A-arm rear pivot.

(15) Ground to lower A-arm ball joint.

(16) Ground to upper A-arm front pivot.

(17) Ground to upper A-arm rear pivot.

(18) Ground to upper A-arm ball joint.

(19) Ground to inner tie rod end.

(20) Ground to outter tie rod end.

(21) Ground to spindle at hub height. Measure from the ground to the center of the spindle.

(22) Lower ball joint CenterLine to lower A-arm front pivot. Project a line, as shown in the drawing, straight across between the center of the two lower ball joints. Then measure from this line, paralle to the cars center line to the center of the lower A-arm front pivot point. Use a postive number if the measurement is in front of the ball joint centerline. Use a negative number if it is to the rear of the ball joint centerline.

(23) Lower ball joint CenterLine to lower A-arm rear pivot. Measure from the line across the two lower ball join centers to the lower A-arm rear pivot point. Use a postive number if the measurement is to the rear of the ball joint centerline. Use a negative number if it is in front of the ball joint centerline.

(24) Lower ball joint CenterLine to upper A-arm front pivot. Measure from the line across the two lower ball join centers to the upper A-arm front pivot point. Use a postive number if the measurement is in front of the ball joint centerline. Use a negative number if it is to the rear of the ball joint centerline.

(25) Lower ball joint CenterLine to upper A-arm rear pivot. Measure from the line across the two lower ball join centers to the upper A-arm rear pivot point. Use a postive number if the measurement is to the rear of the ball joint centerline. Use a negative number if it is in front of the ball joint centerline.

(26) Lower ball joint CenterLine to upper A-arm ball joint. Measure from the center of the upper ball joint to the center of the lower ball joint centerline. Use a postive number if the measurement is to the rear of the ball joint centerline. Use a negative number if it is in front of the ball joint centerlin

(27) Lower Ball joint centerline to inner tie rod end. This is an overhead view measurement, measuring front to rear. Measure from the centerline of the lower ball joint to the center line of the inner tie rod end. This measurement help tell the program if the steering is a front steer or rear steer design. The front steer design has the tie rods located in front of the lower control arms and a rear steer has the tie rods located behind the lower control arms. If the steering is a front steer then enter the number as a negative number.

(28) Lower Ball joint centerline to outer tie rod end.

(29) Caster angle in degrees (+/-). Enter your starting caster angle for this wheel. If its negative, put a - sign in front of the number.

(30) Camber angle in degrees (+/-). Enter your starting camber angle for this wheel. If its negative, put a - sign in front of the number.

(31) Toe setting (half of total) - = toe in, + = toe out. Enter the toe setting , divided in half. if the toe is 1/4 enter .125 (1/8) as the value.

(32) Wheelbase

WIth the information given in these questions the computer program can give the Upper A-arm length, Lower A-arm length, Tie Rod length, Steering Axis inclination, Scrub Radius, Spring Motion Ratio, Shock Motion Ratio, Sway Bar Motion Ratio, Camber Change, Bump Steer, Instant Center Height, Instant Center Width, Roll Center Height and Roll Center Width and a Plot of the Bump Steer. The information obtained from the computer is only as good as the information given to each of the questions.

Questions 1-7

Questions 8-12

Questions 13-23

Questions 24-28

Questions 29-32

NA

Prev

Back

Next