Has anyone had both upper and lower pulley upgrades done on their XJR ? Besides upgrading the cooling system is there anything else that should be modified to cope with the boost ? Head gasket for example ?
A number of years back there were a series of posting from NormanD about his tuned X100 XKR, it might be worth looking at what he did to extract lots more power from his engine, I think he started with a 4L one originally.
