Our Project FR-S was already a really good handling car with the stuff we had done to it with parts from KW Suspension, Whiteline and Cusco but we wanted to see if we could make things even better. With our experience with the Eneos/Evasive Motorsports Pikes Peak winning car, we decided to try some of the same things we learned from it on our own project. That included the installation of Wisefab‘s Track Suspension kit. Although they are known as a drift suspension company, Wisefab also has offerings for track and rally cars as well.
The Wisefab Track suspension kit includes every link of the suspension and new uprights for the car, it is very complete.
The rear suspension consists of drop uprights, the hub and caliper locations have been moved so the car can sit lower without messing up the wheel travel and suspension geometry, more on this later. Also included are new upper and lower control arms, leading arms, and toe arms. Wisefab emphasizes lightweight in their parts and the rear suspension is 15.5 lbs lighter than stock.
The rear knuckle is CNC machined from aircraft aluminum and is pocketed and very light. The axle and brake caliper locations have been moved upward so the car can be lowered without changing the suspension geometry and wheel travel. The geometry for the camber curve, toe curve, roll center location, and anti-squat has been significantly changed as well as the suspension link mounting points have all been moved significantly from stock. The camber curve has more gain under compression, the toe curve is flatter without toe-out under compression and the amount of antisquat is reduced. There is a lot more geometric anti-roll in the geometry as well.
All of the suspension pick-up points in the upright are in double shear which is good for strength. Carrol Smith is smiling in heaven. Wisefab feels that the much stronger double shear mounting can allow them to uses smaller and lighter hardware. This is something that we are on the fence about. However, the double shear pick-ups are good engineering. A neat feature is the upper control arm mount that can be rough set for camber with shims. This means that the upper arm can be set with the heim joints with a lot of thread engagement or you can have a lot of flexibility in deciding upper control arm length which affects the camber curve if you wanted to tune it.