What is that or is it me just unlucky!

Was doing some donuts in the V8-S the ither day but the diff seems to unlock and become open after a few seconds.
What the hell is that all about!

I find it even dangerous as the car suudenly gets grip at the rear end and does not slide anymore.

Unacceptable!

 

In what mode was the traction control?

 

All off

 

The ediff can overheat, and when that happens the ediff will shut it down temporarily until it reaches operating temperature. I'm guessing the performance envelope has been designed for track use where the ediff is on sporadically.
If you are using the car as a donut factory, it may exceed the envelope and overheat

From the user guide:

"If the warning message EDIFF NOT AVAILABLE is displayed, the system has temporarily shut down to prevent overheating. The vehicle can still be driven and the E-diff will be operational again when the system has cooled sufficiently."

 

The E-Diff in my XFR is the same exact way. When DSC is completely switched off, it almost feels like the differential is completely open.

After speaking with a veteran service manager for Jaguar, he mentioned that the E-Diff might only operate when DSC is either fulling on or in the Trac DSC setting. Although that sounds a bit weird, I am inclined to believe him especially after driving the XFR on the track.

Although the car is able to get sideways and leave two black strips some of the time, the inside tire is always leaving a much darker strip while the outside tire is merely leaving a strip because of scrubbing.

If only the F-Type V8S and the rest of the high performance Jaguars with the 5.0L V8 would come equipped with the Torsen mechanical LSD in the V6S F-Type!

 

Are you sure that is true? I couldn't find any references to the V6S having a mechanical LSD instead of an e-diff on this board or the Internet.

 

That is what I read and heard as well. Need to google again and post where I read it.

 

See the f type order guide here, page 2.
https://www.jaguarforums.com/forum/showpost.php?p=1005339&postcount=9

 

Interesting... wonder what would be considered better for track use. I would imagine for street use either is more than sufficient.

 

Yes I am completely positive.

The V6S is a mechanical unit. Attached as an image is documentation directly from Jaguar differentiating the Torsen unit versus their Electronic Active Differential. This is out of their initial release catalog.

A mechanical unit is arguably better due to consistency. Although a well built and programmed E-Diff would be excellent, it seems that a mechanical unit would benefit us Jaguar owners more than the existing E-Diff. Arguments exist for both units, however, I would personally choose a mechanical unit.

 

did you teach the e-diff central position before going blasting from cold ?

 

The E Diff esp with the new sensor linked to the e-rack is superb and you do not have to train it when setting off, it is such a shame that people do not seem to understand how systems work

I race on mech diffs yes of course but an E Diff as you now find in most S/Cars and exotics is a far better option for road use , and many racing would now argue that a fully linked a software control diff is now better than a setup plated unit, however both have to be set up to the individual track if you are heading into top line motorsport with very large race team support.

 

The E-Diff get's a bad wrap in a number of reviews online, it seems to be a highly technical solution to a problem that should not have existed in the first place....

Chris Harris tested the XFR-S in one of his videos and specifically mentioned that the E-Diff overheated several times during the track testing. Same thing said about the F-Type R too...

This really puts me off buying a newer model....after all the effort i've gone to with putting a Quaife into my XJR as an upgrade over the ridiculous open diff, it would seem stepping up to an XFR with the E-Diff would be a actually be step backwards in that sense...

Given that there is the Torsen available for the V6S F-Type, do you think it would be possible to ditch the E-Diff and put the Torsen in it's place? I guess the electronics would need to be addressed, if you disconnect the diff control module does the dash keep showing error messages?

 

I have only seen 1 bad review that was Chris, the others were journalists that did not seem to understand the training of the diff on the GEN1 sensor but no one had issues with the Gen 1 over heating !, seems oil vis is not correct for the gen 2 sensor from what i have been told , on the other hand how often are we going to go doing circles or hammering it round a race track for lap after lap after lap in a car that weighs that much , i have raced on a torsen and had a multitude of issues with it the quaife works well as long as the torque is set correctly but even those have a habit of going loose and needing resetting and checking if hitting them hard or racing.

Wonder if this is purely down to needing a oil cooler of the correct size on the ediff , lots of cars have them higher performance than the F , but of course costing far more money !

 

This thread is useless without video of you doing the donuts!

 

And also not ever replied to the question " did they teach the Ediff centre position "

 

I have already been in jail for several days due to doing donuts on the road so I keep quite with regard to publishing recent videos on internet.

 

Somehow I am not surprised.