I was reading a webpage on the internet that said it was possible to modify a 96 XJR to 400 hp has anyone ever heard or done something to do this?

 

I don't see why it *wouldn't* be possible to get 80 additional horsepower but....how and at what cost?

That said, I'd love to see the web page and I'd love 80 more horsepower !

Cheers
DD

 

It was just some web page with general info on jags but nothing to technical. I wish there was more technical info ill see if i can find it.

 

http://jaguarxj.info/XJRGeneralInformation.htm
Here it is

 

Yeah, the author has us smacking our lips but gives nothing to chew on :-)

What I've gathered over the last few years regarding XJR/6 power improvements is:

1) Lower restriction intake and exhaust systems offer very little improvement.
2) Changing pulleys to drive the supercharger faster doesn't pay off because the boost gain is offset by the air charge being too hot
3) Improving the intercooling seems to be worthwhile.
4) For substantial gains you'll need a bigger supercharger. One fellow I know of changed his M90 for an M112 with good results. A lot of custom fabrication was required

Cheers
DD