We are discussing dealership conditions for LSD (limited slip differential) for 4C. We are focused on two potential business partners we want to cooperate with to offer this engineering art to you customers.
These two are:
1. Drexler (top end clutch-pack type LSD, very predictable to drive, fully customizable ramp angles - lock on acceleration / deceleration, preload - aggressiveness, friction - lock percentage). Best performance you can buy at noticeable price penalty and rebuild services required (depends of driving and driving regime). Pulling lap after lap on the race track could potentially wear the LSD in a year or so of serious tracking, but probably if that's the case, you'll be looking in to clutch rebuild anyway, so it's not all that bad anyway. Rebuilding LSD while you engine is out is a few hour job (replacing clutches inside the LSD).
2. Wavetrac (top end Torsen type LSD, slightly more tricky to drive due to various locking percentage, non customizable). Solid performance at an affordable price and no rebuild needed. In scenarios when a single wheel is lifted and then the car suddenly lands on the ground (over crest, curb), the instant lock of the LSD, can easily brake either LSD helical gears or the gearbox, so it's not commonly used in racing.
Now, my thoughts on this are. Not many customers will be looking into the LSD for 4C, but if you ever driven 4C hard in tight turns, you probably noticed inner wheel spin, regardless of the Alfa Romeo's Q (electronic limited slip), that should be braking one wheel, transferring power to the other. Now if you experienced the inner wheel spin multiple times on your 4C, then we probably agree that the Alfa's electronic LSD doesn't work good enough for serious tracking. And if that bothers you, you'll be looking into the LSD right? So if you are looking into the LSD, you are probably serious tracker and only the best will do right? From this point, the Drexler, clutch pack type LSD is the thing to go, right? You wouldn't be making compromise on this would you? I think I already answered myself a question.
Let me know you thoughts dear fellas...