On larger valves and torque. Going to just larger valves with proper unshrouding and no other changes, what happens to torque at the low and mid range rpm? I found older message in the yahoo groups saying the larger valves help torque because of larger surface area. I don't understand exactly what that means. I thought the larger valves, without any other mods, like increased compression ratio or cam changes, would decrease velocity in general. Or is it that the Opel 1.9 just needs the bigger valves to help achieve better balance, by making up for the poor intake?

Thanks,
Alan