Digital Insertion wrote: tried it; doesn't work in an MY06 STI, in either auto or manual DCCD operation...
... maybe so, but my handbrake, DCCD and a certain muddy paddock say otherwise
You're not trying hard enough mate! ;D
You may be having trouble because your MY'06 STi DCCD has a 41:59 Front:Rear static mechanical torque split, whereas previous MY'05 & prior STis were 35:65 F:R. But even so, the DCCD controller WILL disengage the centre differential clutch packs (i.e. zero lock) when the hand brake switch is triggered on, regardless whether you’re in Manual or Auto mode.
Daz is right about the ‘lift the handbrake 1 click trick’, although technically it doesn’t disengage drive to the front wheels; it just applies no LSD lock-up on the centre axle (thru the c-diff) which allows the c-diff to slip, hence no Limited-Slip effect.
I think you’re just forgetting that to do standstills in a DCCD-equipped car, you need to be pressing the (foot) brake just enough to lock the front axle!
(and preferably have a slight difference in traction b/t F:R if you want to minimise strain your drive line, i.e. less grip at rear tyres/surface)
Unlike an LSD (e.g. when DCCD is in Auto or any locked %)
, DCCD in “Free” mode will still allow a huge rotational-speed difference between front & rear axles - that includes zero rotation at front while spinning the rears. In DCCD “Free” mode, the C-diff operates similar to an open diff, so yes you can definitely do standstills - you just have to get the technique right. ;D ... not that I condone such hoonish behaviour, ahem
... or just fit some foolly-siiick RWD fuses mate!
You’ve seen the footage (Daz’s youtube link) & I speak from experience... I’ve disconnected the DCCD control unit altogether (to diagnose electronic faults)
on my MY'98 STi v.4 Type RA (same technology in principle without the STi v.8-9’s Auto mode & it’s fancy lateral-G/yaw sensors, steering angle sensors, TPS, ABS interface, etc.)
which leaves the DCCD permanently in “Free” mode (no electrical current through the DCCD electromagnetic coil means zero lock)
so it makes my car behave seemingly RWD at WOT.
Anyway, I’m getting da hell outta here before Age starts flogging the RWD fuses again!
RWD fuses FTW!