guy who goes to our local has a supercharged jag xkr, recons its been chipped and has a smaller pulley on the s/c and is now making 630bhp...

also recons he can do the 1/4 at shakespear chounty raceway in 12. something seconds.... on road tyres std pressure, otherwise std car etc

is that him talking bollocks or perfectly possible?

im seeing him again in about 10mins lol