if i had my limiter removed and my ecu remapped,how many more mph can i expect?

 

Is this question about a 2006 onwards XKR?

If you refer to the earlier model 2003 XKR in your Signature line, Jaguar tested these unrestricted to 178 mph at Nardo in Italy.

Graham

 

Think you're in the wrong forum - this one deals with the 2006-onwards cars (X150 model).

I'm not sure what the V-max of the X100 XKR 4.2 is - a wild-**** guess would be 180. My X150 XKR 5.0 is limited to 186, and I reckon it would get at least 10 more if it was de-limited and I had a hell of a lot of road. It was doing about 5500 RPM at the limit.

But: make sure your aerodynamics are up to it. My car was rock-solid at full speed, but it has the X150 Speed Pack bodykit that reduces lift by 25%. I don't know what equivalent body mods are available for the X100, but I'd consider getting that sorted before you try an de-restricted autobahn run.

 

You can already defeat the limiter on the 6-speed cars, it's been mentioned many times before. Sport mode & the J-gate in 5th.

 

Having to stay in 5th may mean you run out of RPM before you hit the (theoretical) max speed. I hit 6250 in 5th at about 180; it then changed up into 6th and I got a few more MPH.