How the Impreza STI AWD System Works

In today's video I explain in a simplified way how the All Wheel Drive System in a 2005 Subaru Impreza WRX STI works.
Watch the story of my Subaru ownership here-
• Death of a Subaru WRX ...

[@AdmiralStickney]

These videos, both on the Impreza and on the Lan Evo have been very enlightening as finding technical information on some models that explains exactly what controls what has been difficult to find. You deserve more views on this one.

[@rowanlewisuk]

Thankyou liking the video and your comment will help it go up the rankings 👍

[@qpl610]

The bias is not 50/50 and the DCCD is both mechanical and electronic. It's in the manual.

[@zeno15sti33]

Wheres the Dccd one?

[@bujin5455]

The engine on the V2/3 STi is an EJ257 btw. The EJ207 was on the Japanese only Legacy based STi V1.

[@deadwillytv6528]

that’s not true

[@bujin5455]

@@deadwillytv6528 Ahh.... yes it is.

[@loukasantoniou8054]

the golf r also uses and lsd what are you talking about? And the torque does not split 50 50, thats what an open diff does.

[@erlingbakke3522]

Isent a open diff also capabal of 100-0 and 0-100 this lsd wont let you spin on 1 of 2 wheels it wont let you go down to no spin i belive

[@loukasantoniou8054]

@@erlingbakke3522 an open diff only splits the torque 50-50. Thats the definition of an open diff. it differentiates relative speed between the two wheels, not torque. I didnt get what you said in the second sentence, care to rephrase?

[@erlingbakke3522]

@@loukasantoniou8054 an open diff can spinn on only 1 wheel i dont think the lsd to subaru can do that

[@loukasantoniou8054]

@@erlingbakke3522 look my man, you seem like you have messed some things up in your head about how different types of dffs work, not beign sarcistic or hatefull, just my honest opinion. An open diff cannot sent torque to one wheel only. It sents the same ammount of torque to both wheels at the same time, all the time. That means that if one wheel losses traction, the whole axle losses traction completelly. If one wheel has lilmited traction, the whole axle has limited traction. A torsen type lsd suffers from the same problem in the first scenario, but in the second scenario, where there is just a bit of traction on one wheel, the torque difference between the two wheels will create a locking force, enough for the diif to sent x times more torque to other wheel depending on the torque biased ratio it has. But it cannot fully lock. A clutch type lsd one the other hand, has a much higher locking force, which means it can almost fully lock. Thats why even in near zero traction scenario, it can still sent torque to the other wheel. Clutch type lsds are speed sensitive though, so they engage due to wheels spinning in completelly different speed, while the torsen type(helican gear), tries to lock because it releases diffent torque load in each wheel.