Thanks for the explanation, Rudi. Will be looking into the path to these!Sure...
This upgrade itself, does not alter the ride height. The coilovers do and they should be adjusted accordingly. As mentioned in previous posts, with OEM front control arms, the optimal ride height is no lower than the default factory specified ride height which is 110mm (ground clearance from skirt to the ground with 1/2 of fuel and a driver in it). If your car is any lower than this, your geometry at the front is sub-optimal. With GMS performance front control arms, the recommended ground clearance is 100mm at front and 110mm at rear (ground clearance from skirt to the ground with 1/2 of fuel and a driver in it). You can go another 10mm lower on both ends, with a track only car, but for a street driven car, anything lower than 100mm at the front is not a pleasant drive over the potholes and speed bumps. Yes, you can run the GMS performance front control arms at "standard" height without an issue, but then again, the uniballs alone would be enough to make an improvement over OEM setup, no need to go for entire new GMS performance control arms, as they work the best with slightly lowered cars.
- Does this tune lower the car either way, or can it be put to standard (of factory) height, as Belgium roads are full of stupid concrete pieces trying to lower the driven speed, but hence making driving a lowered car a painful experience.
By keeping OEM control arms, not lowering the car and replacing the OEM rubber bushings with GMS front control arm uniballs, the steering feedback, dynamic alignment change and steering precision will improve and the geometry will stay as with OEM control arms is. An improvement over OEM setup, but not as noticeable as with the rear control arms upgrade.
- When the height can be kept standard, would the ride quality also be improved, or do you get the same result by putting uniballs in the standard arms?
Running the GMS performance control arms or uniballs at the rear only, is perfectly fine. While I can confidently say that GMS performance rear control arms or uniballs will reward every 4C owner with much finer handling and overall feeling of the car, the GMS performance front control arms are aimed for track focused owners, to extract the very best out of their tuned, lowered cars. For other, not so hardcore users, the GMS front uniballs are more rational choice.
- And in that respect, is a standard front (with or without uniballs), GMS rear arms setup a balanced setup as well?
Do the coilovers first.
- Is this mod worth doing before you get coilovers, or should we begin with those?