You definitely don't need to brake with the clutch in with a Q2 LSD or any LSD I have used with a GTA (Quaife, Autodelta, Madeno as well as Q2)
That said some LSDs have more impact on braking differentiation than others.
e.g.
- A 1 way LSD has no effect under braking.
- A 1.5 way LSD has some mild differentiation effect under braking
- A 2 way LSD has a large differentiating effect under braking, which I have read could cause understeer. This would rarely be used on a performance FWD car, or possibly any performance car. I suppose it is possible that putting the clutch in for something like this could help but you would lose natural engine braking.
I believe the Q2 diff has some effect under braking, I know the EBD/ABS/VDC was recalibrated slightly to match on the Q2 models.
I can't imagine why ABS would not work as well with a diff, since the ABS system works off the wheel speed sensors and has no idea of the level of locking of the diff.
If a wheel is locked under braking, it will release it. It is my understanding with 1.5 way diffs it is possible that they might have help the wheel unlock by somehow transferring a bit of braking torque.
I certainly have had no problems with using ABS on my Q2 torsen diff or Autodelta clutch type diffs.
Adie from AHMotorsport mentioned that the clutch-type diff varaints they and Autodelta use can be set up with various degrees of braking ramp interaction to finely control the effect under braking into a corner. I don't know to what extent this is used by the default AD setup.
I have a slight suspicion I can't brake as well into a corner with my Q2 diff as the Ad diff, but I will confirm wether that is the case next week when I get to try on a familair track with supporting telemetry data. Heres hoping for dry weather, its the wettest June on record in Ireland!!
Cheers,
TB
Originally Posted by henk
does anyone have an idea how an LSD cooperates with ABS brakes?
When braking with an open diff, right wheel on the wet, left wheel on a dry road surface the ABS will interact more frequently on the right side. ABS works in an optimal way since it can affect all wheels independently.
When braking with a locked diff (different road surface again) my understanding is that the wheel on the wet side will not block as soon as it would with an open diff and thus ABS will not react in an optimal way!?
I read somewhere that you always need to press the clutch when braking with an LSD mounted. If this is the case, then it probably is not a good idea to implant an LSD in a Selespeed!?
Henk