Ok, here's a question for the techy\serious tuners.. Feel free to correct me on any of this..
Valves.. The Std Q4 valves are sodium filled aren't they? to dissipate the heat from the combustion chamber to the stem. I've heard that the process of making these valves has been banned by the EEC possibly as a result they are VERY expensive - I've heard figures of around £50 each!
Mnemonic valves.. does any one know the differences, pro's\cons? I've been talking to Mike Billett about it all (Steve Webb might know who I'm talking about here..) & he thinks Mnemonic's should more than do the job..
(& yes, I'm probably going to have to buy valves as well!)