12. Determine the correct strut height adjustment.
The strut mounting height can be adjusted with the Caster Camber plates. The reason you would adjust the height is to ensure that the suspension can move through it’s normal range of motion without running out of travel. On a lowered car that usually means raising the strut up so the suspension can compress further without bottoming. On a drag car sometimes it is beneficial to lower the strut mount so that the front suspension can extend farther at launch without lifting the wheels off of the ground.
In general, the lower the ride height, the stiffer the spring needs to be to prevent bottoming the suspension . Some companies use stiffer springs than others, so there is no one set ride height where you will definitely have a bottoming problem. In addition, not all aftermarket struts are the same length. The accompanying guidelines are general staring points only. Your car may vary.
It is the responsibility of the customer/installer to determine the correct strut height setting. If you encounter a bottoming problem with your spring and strut combination, move the strut to a higher mounting position. If the car has been lowered more than 1&1/2 inches, shorter struts such as Tokico BB3026 or HB3026 are recommended to allow the suspension to compress further without bottoming.
NOTE: these Caster Camber plates are designed to be used with the factory bump stop on the strut. If you are installing new struts, the factory dust cover and bump stop must be transferred to the new struts. The bump stop looks like a rubber donut that rides on the strut around the piston rod, underneath the dust cover.
Strut Height is set by the size and number of spacers that are placed on the strut, on top of the dust cover, underneath the camber plate bearing.
-1 This lowers the strut mount slightly from stock.. Use this setting for longer strut extension when drag racing or when shorter than stock struts are used with stock height springs.
1 This raises the strut mount slightly from stock. This is the most common general-use setting for stock to 3/4” lowered vehicles with stock length struts, and for lowered vehicles with shorter than stock struts.
2 This raises the strut mount 2 steps above stock. Use with 3/4 to 1-1/2” lowered vehicles. The rubber on the top of the dust cover must be trimmed to run this setting. (See below).
3 This setting is used for cars that are experiencing severe bottoming problems, due to excessive lowering with inadequate spring rates. It is necessary to completely remove all rubber from the dust boot to run this setting. Depending upon your alignment settings, you may have to grind the steel top of the dust cover or leave it out altogether to prevent it from binding against the strut tower. Even if the dust cover is left off, the bump stop must still be used. Also check hood clearance if you are running this setting.