Well yeah, this is true, but I've wound up learning almost everything I know from the internet. Nearly nine years on forums has been quite an education - though not
always for the best.
And it's almost always done me well to follow the guidance of people like you guys who know a shit load about the car I drive. To be honest, it's helped me guide mechanics and experts a few times, and these are people who supposedly know cars.
I'm still a little fuzzy though. It stands to reason, as far as I'm concerned, that post combustion you'd want to get rid of more gas than comes in. Yet, from what I now understand, exhaust valves are always smaller than inlet valves. So Frode's measuring an inlet valve on this, right?