Depending on the drive train losses, we might have passed the 600 BHP mark on a 4.0 XKR with our twin-screw conversion. We actually where able to pull 470 rear wheel horsepower, and using a 22% drive train loss figure (for some a common loss for automatic cars), you come to 603 BHP. We have learned ...

Hi GT, and thanks for the welcome, I have spent a lot of time trying to get to the roots or “The Truth” about which cars have Nikasil and which don’t. Have you read the service bulletin? Many people (Jaguar inclusive, editors etc) have based their ideas on the service bulletin S491, where most of th...

Just out of curiosity, where do you get that info from? As from my research that is totaly wrong. If it was an old article from JWM (to be seen on jaglovers), then you should read their new article in the April issue. There they aknolwedge what Jaguar was saying all along in a official Service Bulle...