The reason they use the Viscous unit is because when a ramped diff has no nose pressure (torque) applied the diff rely on the static preload, so if you lift a rear wheel over a racing curb the diff will open up and you can get what we call in-lift, where the wheel spins away before it gains traction and locks the diff back up. The E46 M3 LSD is still a mechanical plated diff, but with no ramps, instead it has a higher static preload which is around 110ft.lb and the viscous unit is there to keep it from running away from itself, it kinda acts like progressive but when it gets too hot it just fails, its a shear pump and the plunger pushes on the clutch pack, in the same way a ramp set up would work (kinda). The E36 M3 Evo LSD is a fully mechanical ramped plated diff, more torque applied to the nose of the diff more the drive is forced up the ramps and harder the diff locks, so you have a static preload, and the diff gets more progressively locked as more torque is applied to the nose. The e36 m3 evo diff is worth a look as it fits in the e46 casing we have and is fully mechanical. If it ever needs fixing I will most likely get it rebuilt with a 3.91 cwp. Just the standard one, perfectly happy with it tbh and more than tough enough for my needs so far. TomK, I'm guessing you are running a plate diff in yours?
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |