Has anyone managed to bypass the speed limiter? Xj350 2004r

 

One way is to remove the fuse for the ABS. (the car will not have a speed input)
You can use a GPS devise to determine speed?

You will also cause MANY DTCs to be logged in various modules.

 

Remap?

 

And this is really only one way to limit. No one was able to free their cat?

 

To what avail? And whywudwewannadoo?

US market limit IIRC was around 150 MPH when the "NA" 2005 X350 had demonstrated capability of 172 MPH and the "SC" model around 205 MPH - both figures measured on an appropriate test track.

Few 'ere live on test tracks. Average age of a Jaguar owner is North of 40 years of age. Most have outgrown "raging hormones" by then, are adept at getting from point A to point B expeditiously, yet without attracting undue attention, the delay of fines and annoying paperwork.

Last lapse in attention's 83 MPH cost me half a day in Court and close to two thousand bucks to stay out of jail. Lifetime average is still cheaper than one set of decent tires.

If 150 MPH seems overly 'restrictive'?

What, where, how, and .....WHY.... was YOUR plan for 172 - 205?

 

I have a 120 mile limit. I'm traveling around Europe. There are no limits on highways in Germany

 

Dunno which era of "Germany" you expect to traverse, but that was NEVER "universally" true, Bernd Rosemeyer is long-gone, and space to grab at high-velocity is diminishingly less available than once was on even the tier-one Autobahns.

Not that there is all that much left of them, what with urban sprawl, increased population-density, and traffic jams..... in a nation about the size of Pennsylvania.

Even Nevada ain't what it once was - back when the late Bill Harrah commuted in a 150 MPH+ capable Ferrari-motored Jeep Wagoneer!

 

There are still enough highways without a limit over here , if I remember correctly we talk about maybe 40%, and a 120 mph limiter can sometimes be frustrating. Mostly, it will be OK.
Volvos are limited to 180 km/h (app. 112 mph) nowadays, and that's definitely frustrating, at least for me...

Fortunately, the limiter is set to 250 km/h (app. 155 mph) for at least cars for the German and Italian markets (my car originally was delivered to Italy)...

It should be a given, but please only drive at high speeds in safe conditions (traffic, weather, etc.), if are used to it and you do not risk the lives of others!

Best regards,

Thomas

 

Everything is great, but I still don't know how to remove my limiter

 

The only way I know is via a remap of the ECU, there are companies that specialize on this. I do not know how successful they are, but I have seen the same question in the German Jaguar Forum for X350s imported to Germany from the US, and no one had a definite solution. It seems that even a reflash of the ECU done at Jaguar dealers did not work.

Best regards,

Thomas

 

"...the "NA" 2005 X350 had demonstrated capability of 172 MPH and the "SC" model around 205 MPH ..."

Not sure just how this was ever "demonstrated"... Pretty sure my v healthy SC '07 XJR would run out of steam long, long before that, as would my SC XKR175.
The XJR will get into the 130's pretty easily, however, per my GPS log. I'm guessing the USA X350 models have a 155 MPH limiter; the X175 has a 174 MPH limiter.

Interestingly, my M550i (BMW) is also 155 MPH, but only because it was special ordered with ZR Michelin Sport non runflats. Normal is 118 MPH.

JLR did a speed record X351 XJR in 2015: ~ 172 MPH flat out, IIRC...

 

Factory published it. Journalists reviewing it when new picked it up. Pubs are still online.
It also made sense w/r as-built gearing & as-built motor red line, etc.

Can't imagine anyone into serious competitive sports being unable to find any of many better starting mounts to 'prodify' than a Jaguar already old enough to vote in most elections? Risk of metals failure does not diminish with advancing age.

Even brand-new, Jaguar's aren't so much "luxurious-enough FAST cars" as they are "fast-enough LUXURY cars".

Meant to be enjoyed from behind the wheel. Not from behind bars.
"Run what you got", they came out of the egg already rather nicely balanced.

If opening-up the top-end actually made a person's genitalia any larger?

It could get seriously hard to steer the *****-cat.

Or even remember why one would WANT to?

I can imagine the "trip log". By the time a stop every 60 klicks to **** over the episodes of joy was factored in? Some Andorran Grandma who didn't HAVE to stop would have beat yer time in a vintage Renault Laguna Diesel and already be seated at-table ... finishing her soup course!

 

Gentlemen, do all of you actually have a speed limit of 120 mil/h? X350 2004, American version.

 

Not even close. We have the same recommended 80 MPH max...... *or less*

...https://en.wikipedia.org/wiki/Speed_...ance%20traffic.

...as ta da... would you believe...German Autobahn's:
With a limit of 150+ MPH in the ECU (or wherever) we'd never get above about HALF of it before running a risk of jail time.

 

Yes, here in Germany there only is the general recommendation of 130 km/h on highways. Then, of course, there are all the local speed limits on parts of the highways that are binding.

The recommendation also has legal implications: you may drive faster than that without having to fear a ticket for speeding on the unlimited stretches, but if you are involved in an accident and they see that you were faster than 130 km/h, then you will get a partial culpability and the insurance may have the right not to pay out.

There was a so called "gentlemen's agreement" between car manufacturers to limit the top speed of their cars to 250 km/h (155 mph), and Jaguar adhered to it for the X350-X358.
Some manufacturers, like for example Porsche, never followed this agreement for obvious reasons, others saw it as a way to make more money by charging a hefty surcharge for having a particular car delivered without a speed limiter, sometimes including the obligation of participating at a high speed driving course...

A similar agreement existed for some time between motorcycle manufacturers, in this case to limit the power of bikes to 100 PS (around 98 hp), but it did not last long.

Best regards,

Thomas

 

Posted speed limit on Muskogee Turnpike in Oklahoma is 85mph. I think also on 44S between Tulsa and OKC.

 

There are two ways that I'm aware of, but I haven't personally tried either of them. One way is to hire a professional "Tuner" at one of your area raceways who will typically raise the factory set limit. The other way is to simply keep the car in 5th gear and gun it. What happens is that the car will be forced into 'Drive' while simultaneously bypassing the speed limiter. You see, the factory set speed limiter only works when the shifter is physically placed in 'Drive'.