AFAIK there is no electronics currently.
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Mechanical limited slip diffs (front/centre/rear) are allowed by regulations now:
See section 5.2b
http://www.fia.com/file/37755/download?token=qSz1j2jX
Front/central/rear differentials
Only the housings and mechanical limited slip differentials
homologated in the WRC extension may be used (without any
modification).
"Mechanical limited slip differential" means any system which
works purely mechanically, i.e. without the help of a hydraulic or
electric system.
A viscous clutch is not considered to be a mechanical system.
Any differential with electronic management is prohibited. The
number and the type of the plates are free.
From next year, hydraulic control of the centre diff (via electronics of course) will be allowed again.
Good info, cheers :)
Centre dif. is allowed, but they don't use it.
Are F1 type water cooled intercoolers allowed in 2017 regulation?
now no center diffs at all in WRC cars (same with R5).
active center diffs is huge difference, big advantage over non diff at all or mechanical center diff.
mechanical centers were used/tested in beginning of S2000 cars, but finally everyone decided not to use them at all.
subaru or mitsubishi with well set active center diff is much more easy to drive (and way more faster) than same car with mechanical center diff.
the intention is not to stop r5 drivers from going to wrc cars, the intention is to stop rich 18 year old kids from buying a wrc car and hurting themself.
the question is of course if this is actually necessary. latvala, mikkelsen and ostberg all started very quick in wrc cars, payed by their family's money.
I may not have explained well enough, an active centre diff in my experience rallying has so many variables depending on surface, and what you are doing with the pedals, whereas a mechanical is more predictable, as it drives essentially the same when sideways each time, and can then be adjusted with the pedals.
I think for someone learning to drive fast and understand the cars dynamics, electronics while definitely faster, will dull your understanding of how the car is acting and therefore potentially give you a false sense of what you are doing to the car, in comparison to what the electronics are doing?
Definitely agree though that active will be quicker, just not necessarily a good thing for someone who is learning to drive a rally car.
Al-Attiyah in talks for fourth Volkswagen WRC seat
http://www.motorsport.com/wrc/news/a...c-seat-734737/