Originally Posted by JCtx

Indeed, but that's not what the instructions you posted said, hence our confusion. They said to press the gas pedal lightly, and when the launch message says it's ready, to release the brakes, then floor the gas pedal. That's clearly just a brake-torque launch. But if it's like you just described above, then it'd' be proper launch control. So for which model were the instructions you posted??? Just curious.

Originally Posted by jcb-memphis

Be nice to your rear diff.....it is expensive to repair. I have a V6S with the same ediff and such as the R...the R's and SVR's have their torque exactly at the limit of the zf8HP70. Not a coincidence that from the factory the tuning is this way....I am quite sure Jaguar could have tuned the cars for more power...

Originally Posted by OzXFR

Nup, the V6S doesn't have the e-diff, instead it has a mechanical LSD (while the base has an open diff).
And I'm fairly sure it's not the engine tune in play instead it's the TCM (transmission control module) telling the PCM (powertrain control module) to cut back on the torque under certain conditions.