SPC lower A arms – Setting Ride Height
SPC Lower A Arm Ride Height Adjustment SPC Lower A arms have a modular lower spring seats that allow ride height adjustments to be made while using standard format springs. Various combinations of spacers and seats will yield different ride heights.
-All of the ride height numbers below are in reference to the lower A arms only. Other modifications such as lowering springs, drop spindles, tall lower ball joints etc. will also alter the ride height of the car and their effect is cumulative so be sure to take them into account when setting your desired ride height!
-To adjust ride height simply add or subtract spring pocket components from kits #94347 (5”OD) or #95333 (5 ½”OD). The thickness of each spacer changes the ride height roughly 2:1. (¼” thick spacer changes ride height ½”) Spacers can also be used in asymmetrical combination side to side to correct a car that doesn’t sit level.
-To get the baseline ride height of OE stock lower A arms, first remove the provided flat red urethane spring seat. Then install one flat steel spring shim and one helical aluminum spring seat.
**Component configurations for lowering the car are as follows.** These formats are handy for lowering an otherwise stock car or for accommodating tall drag springs.
-To lower the car roughly 2” use only the included flat red urethane spring seat.
-To lower the car roughly 1 ½” use the red urethane seat on top of one ¼” thick steel shim.
-To lower the car 1” use the red urethane spring seat on top of two (2) ¼” thick steel shims.
-To lower the car ½” switch to the helical aluminum spring seat.
**Component configurations for lifting the car are as follows.** These formats are primarily problem solvers for cars that are too low.
-To lift the car ½” use the aluminum helical seat with two (2) ¼” thick steel shims.
-To lift the car 1” use the helical aluminum seats with three (3) ¼” thick steel shims.
-Additional lift can be provided with SPC aluminum upper spring seat inserts up to 5/8” thickness. Formats using ¼” steel shims can also raise shocks that have been mounted on top of the A arms to allow for more droop travel or for access to rate adjustment knobs with #94348 (5”OD) or #95338 (5 ½”OD) ¼” plates.