Jaguar XJ X356

[paydase]

Bonjour,

 

Je pense que la voiture en question est une évolution significative de X350 et mérite un fil spécifique pour retrouver facilement ces informations.

En effet, on a l'habitude de parler des deux phases de la XJ Alu Mk1 comme X350 et X358.

En réalité, en 2006 est apparue une version substantiellement nouvelle de la configuration de X350 avec les modifs suivantes, je cite en anglais (sources de Jaguarforums):

http://www.jaguarforums.com/fo [...] 58-162606/

 

The X356 was the first facelift for the 2006 model year, it brought in HUGE changes to the vehicle's electrical and software systems, but on the outside it looked like the earlier model.

 

A l'inverse, X358 apparue en fin de vie de X350 pour tenter de relancer les ventes n'était qu'une modification "de façade":

The X358 was a facelift, mostly a cosmetic update to the X350/X356. There were some minor changes to specification and fitted option: bumpers, vents, etc...

 

Voici donc, plus en détail, les modifications apportées avec X356:

 

X356 was in the internal model designation for the X350 from the 2006MY, starting at VIN G49701

Externally there was only minor changes; the rubbing strips on the doors were removed, the front fenders/wings changed as did the side indicator on that panel (changed to the oval lens, from the spear lens that matched the rubbing strips).

On the supercharged cars the Brembo brakes were dropped. And the braking system was changed with new brake booster, vacuum assist, new hydraulics and ABS.

The major changes were to the electronics and software systems in the vehicles. It was a major overhaul, and a little complicated to explain.

Lots of electronic components such as modules, sensors, were new. The throttle body changed on the V8's, getting rid of the Denso TPS (which is why nobody with a 2006 complains about the TPS failing). The supercharged V8's got VVT (previously VVT was only on the naturally aspirated V8). Secondary air injection was added and the European cars changed from Euro3 to Euro4 emissions specification. The catalysts changed as part of the emissions upgrade.

The software platform of the cars changed from having a VID Block, to having a CCF (Car Configuration File) same as the Land Rovers, and later Jaguar models. The software format of the major modules changed from using .bin files to .vbf files.

As such many of the major electronic modules are not compatible between the 2006MY and earlier cars.

TPMS and Bluetooth were added as factory fitment.

There were some other small changes too, but that's the major stuff...

X356 est ainsi plus proche de X358 que de X350

[paydase]

Comme cette info (que je viens de poster sur un sujet secondaire S-Type, après avoir passé un bout de temps à la retrouver) risque de tomber dans l'oubli (comprendront ceux qui peuvent ), je la reposte ici.

Evolution significative du V8 Jaguar en 2006, avec une explication du pourquoi on n'a pas besoin de mettre du SP98, le SP95 convient tout à fait.

On ne vous incite quand même pas à mettre du 95-E10, hein .

 

http://www.jaguarforums.com/forum/xj-xj6-xj8-xjr-x350-x358-28/quest-450-horsepower-168474/page8/

 

Regarding the ignition timing based on the IAT2 temps, a better explanation now.

 

The 03-05 cars only had one tune for all markets, and this had to cover the worst grades of fuel i.e. 91 RON / 87 AKI, so the ignition timing retardation from IAT2 is based on the detonation properties of 91 RON / 87 AKI, basically if you're running 98 RON / 93 AKI, or even 95 RON / 91 AKI the timing is being pulled back unnecessarily as charge temps rise, as you're not going to be near the point of detonation at those charge temps if you're running the higher grades of fuel.

 

Yes there were two types of factory tune, "smooth road market" and "rough road market" but this was only related to misfire monitoring Differences between Rough Road and Smooth Road spec vehicles? the fuel/spark and IAT2 ignition compensation was the same for all markets.

 

And yes there were also different emissions specifications, FED/NAS, EURO2, EURO3, etc, but again no changes in regards to the grade of fuel used.

 

For the 2006-onward cars there were different factory tunes for different markets, which covered the fuel grade, as well as emissions and the misfire monitoring / smooth or rough road. Long story short, if your 2006-onward vehicle is a UK, EU, NAS, ROW specification car, it's designed for 95 RON / 91 AKI fuel and the ignition timing reductions based on IAT2 temps is nowhere near as severe as the earlier cars. Also the way that the timing is pulled is on a different strategy to the earlier cars.

 

So what does this mean?

 

Well firstly it means i've wasted a lot of money on 98 RON and 100 RON fuel over the years. It also means I was experiencing the placebo effect when I was running 100 RON in the car when it was in Switzerland & Germany.

 

But it also means there is an improvement to be had in the tune if you are not running the car on crappy fuel!

 

The UK has 99 RON, also 98 RON / 93 AKI

Germany, Switzerland has 98 RON / 93 AKI, and from Shell you can get 100 RON

Australia, New Zealand, 95 RON / 91 AKI & 98 RON / 93 AKI, plus various other lower grades

The USA & Canada, 93 AKI / 98 RON, but not everywhere, some people only get 91 AKI / 95 RON

 

What this means for the 2003-2005 cars is that we need to make two different tunes, one for 98 RON / 93 AKI, and one for 95 RON / 91 AKI. There will be some differences between the tunes in the "Spark Advance IAT2 temperature compensation"