Hi there,

as I finally straightened out all my DTC issues and the car ran without any problems or fault codes for nearly a week I took her on the Autobahn yesterday to check her potential.

The "Bahn" as we say over here was dry and pretty empty so I put her in "S-mode" and floored the pedal.
Accelleration was okay. Not as breathtaking as my former BMW though (a 12 cylinder 7-series E38) but for a car with that elegance I was quite impressed.

At around 250 km/h (~155 MPH) and the rpm's still not in the "red zone" obviously the limiter got involved.
The RPMs suddenly dropped a notch and the Jag wouldn't accelerate any further.
I could clearly feel that there was potential to go faster but I guess the Englishmen that developed that car thought that 250km/h was fast enough for it.

So I'm a little bit disapointed about that limit up there even if I doubt that my car would be driven that fast very often.
I love to cruise and get a good mileage out of her and that's the way I usually drive her.


David

 

You need the IDS to remove/alter the top speed (factory software)

 

It was a "Green" deal major car firms had with Europe. A lot of Mercedes, BMW, VW, etc have all got a top speed of 150-155 limited.

I draw your attention to this video:
http://www.youtube.com/watch?v=EkM7PhvxMkY

But in the UK it is very difficult to ever see your speedo touch the limit, unless you happen to own a runway. :/

 

Great video!

Thanks for sharing.


David

 

And here you can see the way the limiter cuts the RPMs.
http://www.youtube.com/watch?v=I5d9TS91XoY
It's not my video but the rev meter in my car behaved exactly the same.

So it's quite normal I guess.

@ Sean
I suppose the only one to change the software would be the Jag-dealer?
But I guess they would either completely refuse to do such a change or charge me a fortune for doing so.

 

You've got me curious now. What is an XJ8 Sport ? Is it just an XJ8 with some cosmetics or is is a beefed up XJ8 or is it an XJ8R ?

 

Hmm... I really dunno.
I think it's just a regular XJ8 with a stiffer suspension and the XJR mesh-grille.
(Looks like an XJR but has no SC.)

 

So did you get a floating sensation over 145 mph?

 

I want to storm the Bahn so badly >.<