JRZ RS Pro Shocks
When it comes to suspension tuning, adjustability is paramount. Different tracks require different settings in order to obtain and maintain maximum grip. For our BMR CS we have gone with the JRZ RS Pro 2 shocks to obtain that adjustability and ensure we can have a car which will stay planted and compliant on the track so you can drive at your peak. These are 2-way adjustable shocks featuring compression and rebound adjustment with remote reservoirs, mono ball strut tops, and Eibach coil over springs. The reservoirs are piggy backed on to the front struts and are remotely mounted for the rears. This system gives us maximum adjustability with minimal cost as opposed to some other 4 way adjustable systems. This design also allows us to easily swap springs out for ones with different rates to further tune the suspension should we need to. We have already tested and tuned this system many times and have come up with a suspension that right out of the box will allow you to push the car and yourself to its limit. And we are sure you will see just as others how neutral, fast, and fun the BMR CS is.
Jrz RS Pro 2 Coilovers mounted on the BMR CS
Front and Rear GT3 Control Arm
The stock control arms on the Cayman have very limited amount of adjustability in regards to camber. They do not allow for the amount of negative camber that is needed for track alignments and race setups. More negative camber is needed to achieve more grip and better tire wear. By dialing in negative camber we can get the tire to stand up straight through the turns allowing the largest possible contact patch and therefore the most grip. This also helps with tire wear by having the main part of the tread in contact with the racing surface as much as possible promoting more even tire wear. We install GT3 lower control arms front and rear to give us this added adjustability. The GT3 control arms are a split, 2-piece design and allow us to dial in the camber with different shims. This allows for proper alignment of the suspension so the car can handle as neutral as possible and to help maintain grip through the turns.
Solid Adjustable Thrust Arm Bushings
In addition to the split GT3 control arms we add solid adjustable thrust arm bushings. These bushings allow for correction of the caster on the vehicle as well firming up another previously soft rubber bushing. Caster correction is necessary to achieve correct suspension geometries. As different parts of the suspension are changed, ride height, camber, toe, so must we change and adjust other parts in order to maintain suspension geometry and to get the vehicle handling properly. And our thrust arm bushings allow for more adjustment than the standard GT3 control arms and are more in line with the GT3 Cup arms but without the added cost and are PCA legal.
Adjustable Front and Rear Sway Bars
To help further tune the suspension we install Adjustable front and rear sway bars. These allow us to tune the understeer and oversteer of the car and prevent body roll. This again helps keep the car planted and stable through the turns so you can keep your foot in the throttle. These are high quality adjustable bars that feature mono ball adjustable drop links. The adjustability allows for fine tuning and different driving styles. And the mono-ball drop links help to continue the stiffening of the chassis. The mono-balls make sure all of the input is direct and not lost through a rubber or poly bushing. These are a definite upgrade for anyone who is serious about the handling of their car and will make an immediate difference.
Mono-ball Rear Toe Control Arms
Many Caymans and Boxsters with modified suspensions can become unnerving while on the track braking from high speed as the rear end becomes unstable. This is because of either too much shock rear bound or improper toe alignment. If the toe is out of spec bump steer will be induced which creates the instability. The stock arms do not allow for enough adjustment as there is only an eccentric bolt which is imprecise and known to slip. To get enough adjustment the arm must be replaced so that the end can be properly aligned with the outer end of the Lower Control Arm so that proper suspension geometry is maintained. Our Toe Control Arms are full mono-ball units and provide the adjustament to correct the bump steer. We also eliminate the eccentric bolts so that they won't slip and change the toe while on track. This is an essential item for race cars and an excellent upgrade on modified street or DE cars which help settle the car and will allow you to drive with confidence.