1 (X):  Left Front Anti-Lift or Left Rear Anti-Squat

%

The resistance to lifting in a front suspension or resistance to squatting in a rear suspension due to suspension geometry during acceleration.  In a suspension with 100% anti-lift/squat the moment about the side view instant center due to weight transfer is exactly offset by the moment about the side view instant center due to the acceleration force.  See the following equations:

Front Suspensions Live Axles

acx = -(front drive ratio)/2

dtwt = slr*abs(2*acx)/(diff ratio)/track

aczleft = -(cg height)/2/(wheel base) - dtwt

aczright= -(cg height)/2/(wheel base) + dtwt

Orientation A:

dzfleft = acx*(C(3,1)-slr*C(3,5))+acx*(C(3,7)-slr*C(3,11))

dzfright = acx*(C(9,1)-slr*C(9,5))+acx*(C(9,7)-slr*C(9,11))

Orientation B:

dzfleft = acx*(-C(3,1)+slr*C(3,5))+acx*(-C(3,7)+slr*C(3,11))

dzfright = acx*(-C(9,1)+slr*C(9,5))+acx*(-C(9,7)+slr*C(9,11))

dzwleft = aczleft*C(3,3) + aczright*C(3,9)

dzwright = aczleft*C(9,3) + aczright*C(9,9)

left anti-lift = -100*dzfleft/dzwleft

right anti-lift = -100*dzfleft/dzwleft

Front Suspensions Fixed Differentials

acx = -(front drive ratio)/2

aczleft = -(cg height)/2/(wheel base)

aczright= -(cg height)/2/(wheel base)

Orientation A:

dzfleft = acx*C(3,1)+acx*C(3,7)

dzfright = acx*C(9,1)+acx*C(9,7)

Orientation B:

dzfleft = -acx*C(3,1)-acx*C(3,7)

dzfright = -acx*C(9,1)-acx*C(9,7)

dzwleft = aczleft*C(3,3) + aczright*C(3,9)

dzwright = aczleft*C(9,3) + aczright*C(9,9)

left anti-lift = -100*dzfleft/dzwleft

right anti-lift = -100*dzfleft/dzwleft

Rear Suspensions Live Axles

acx = -(1 - front drive ratio)/2

dtwt = slr*abs(2*acx)/(diff ratio)/track

aczleft = (cg height)/2/(wheel base) - dtwt

aczright= (cg height)/2/(wheel base) + dtwt

Orientation A:

dzfleft = acx*(C(3,1)-slr*C(3,5))+acx*(C(3,7)-slr*C(3,11))

dzfright = acx*(C(9,1)-slr*C(9,5))+acx*(C(9,7)-slr*C(9,11))

Orientation B:

dzfleft = acx*(-C(3,1)+slr*C(3,5))+acx*(-C(3,7)+slr*C(3,11))

dzfright = acx*(-C(9,1)+slr*C(9,5))+acx*(-C(9,7)+slr*C(9,11))

dzwleft = aczleft*C(3,3) + aczright*C(3,9)

dzwright = aczleft*C(9,3) + aczright*C(9,9)

left anti-lift = -100*dzfleft/dzwleft

right anti-lift = -100*dzfleft/dzwleft

Rear Suspensions Fixed Differentials

acx = -(1 - front drive ratio)/2

aczleft = (cg height)/2/(wheel base)

aczright= (cg height)/2/(wheel base)

Orientation A:

dzfleft = acx*C(3,1)+acx*C(3,7)

dzfright = acx*C(9,1)+acx*C(9,7)

Orientation B:

dzfleft = -acx*C(3,1)-acx*C(3,7)

dzfright = -acx*C(9,1)-acx*C(9,7)

dzwleft = aczleft*C(3,3) + aczright*C(3,9)

dzwright = aczleft*C(9,3) + aczright*C(9,9)

left anti-lift = -100*dzfleft/dzwleft

right anti-lift = -100*dzfleft/dzwleft

2 (Y):  Right Front Anti-Lift or Right Rear Anti-Squat

%

See Component 1 (above) for explanation and equations.

3 (Z):  Average Front Anti-Lift or Rear Anti-Squat

%

The mean of components 1 and 2.

4 (RX):  Left Front Lift or
Left Rear Squat

mm/g

The front suspension lift or rear suspension squat during acceleration or:

Front Suspensions

left lift =
-(dzfleft+dzwleft+aczleft/(tire stiffness))*weight

Rear Suspensions

left squat = (dzfleft+dzwleft+aczleft/(tire stiffness))*weight

5 (RY):  Right Front Lift or
Right Rear Squat

mm/g

The front suspension lift or rear suspension squat during acceleration or:

Front Suspensions

right lift =
-(dzfright+dzwright+aczright/(tire stiffness))*weight

Rear Suspensions

right squat = (dzfright+dzwright+aczright/(tire stiffness))*weight

6 (RZ):  Average Front Lift or Rear Squat

mm/g

The mean of components 4 and 5.