30-09-2018, 12:34 PM
Simon - what head is yours with, out of interest? It would be good if we built on Tony's notes and put up simplified case histories (head, what treatment,) so that other people don't need to go through it all! I'm presuming also that the state of piston oversizing/bore creates a measurable diffierence as that part of the equation moves depending on the engine, whereas the bit for the head does not?