Riz

I was reading that the 991.2 gt3 manual trans has a regular limited slip while the pdk version has the E diff. What does this mean as far as putting down the power - the pdk car should be better right? Maybe some of the more knowledgeable guys can elaborate.

drdonger

Probably similar to the GT4 diff. Not a serious track diff.

TRAKCAR

Means you need to upgrade diff if you track often enough.

brownan

Mechanical one probably made of paper mache like usual. Guard internals will sort.

tgavem

Very different system.
With PDK, the e-diff and torque vectoring, all system work together for optimal track performance, i.e. Computer managed.

With manual and mechanical diff, torque vectoring is limiting and not as good.
Why the RS, a track focused car, will only come with PDK in order to maximize track performance.

DK7

Which system use more often the brakes for little corrections?
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MaxLTV

Likely the non-electronic one, because brakes will have to compensate for what the diff cannot do as well. Also, current GT3 does not use rear brakes much, so ediff is doing its job well.

Mika911

This is very interesting if true. My only reference point is driving Evo X on ice, which I do at least once per year. The difference between the ones with mechanical diff vs electronic is astonishing, the latter just putting the power instantly where you have the grip allowing you to balance the car with incredible accuracy. The mechanical diff requires a lot more patience. It's the expert's choice, because electronic diffs are not allowed in rally's, but the difference in performance is extraordinary.

tstafford

Very interesting thread.

Jimmy-D

I would be interested to find out if they used a different/better mech. diff for the .2GT3. Porsche has to know it needs to be upgraded.

bronson7

Would you say the E diff wears out the brakes sooner, if so how much sooner if you track?

TRAKCAR

^^ no that's SC but you really have to overcook it to wear the rear pads.

Never turned SC off and my pad wear is 3:1 F:R.

R.Deacon

^same never turn SC off , but on my car (non RS) 2:1 , F:R maybe due to braking too late too hard
( o.t. my rotors and I happiest with Ferodo pads )

bronson7

SC ???

R.Deacon

^ ESC button, I think he is referring to , electronic stability control (nannies)