I’ve added another three topics to the Tech Talk page.
Tech Talk #8 studies the effect changing rocker arm ratio has on duration. Plus how the average cam card doesn’t provide sufficient detail to accurately compare cams from one manufacturer to another brand’s grind of apparently similar design.
Tech Talk #7 discusses the theory ‘square’ engines deliver the best balance of torque and power – a square engine bing one where the bore and stroke dimensions are identical.
Tech Talk #6 looks at the power taken to drive the alternator and cooling fan, with a graph showing back to back belt-on, belt-off tests on a 2110cc engine.
Belt-on, belt-off power comparison
More detailed info on these and and other technical topics on the Tech Talk page.