Comments by "bakters" (@bakters) on "Engineering Explained"
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+Your Mom - The easiest way to think about it I found - torque equals displacement. The more fuel you burn, the more force you produce so you get more torque.
It's not perfect simplification, but it should help in understanding what's going on.
Like, longer connecting rods will not change the amount of fuel burned, so they don't matter, but longer stroke does matter. It also changes the leverages at the crank and increases torque that way, but at the cost of lower max rpm for the same piston speed.
Aftermarket bolt-ons - do they change the amount of fuel burned? Sometimes they do, when intake and exhaust systems are quite limited from factory, so they may work. Sometimes they don't.
Small engines with high torque - not really. Until we are talking two-strokes, which burn twice more fuel for every turn, then yes. Or until we compare with really old flathead motors, which couldn't burn the fuel efficiently due to weird combustion chamber shape.
7L engine with about 300 Nm of torque? Only if it was intentionally throttled down. Maybe unintentionally, but throttled nonetheless. Such huge combustion chambers should give more torque when full.
There are other exceptions, but displacement=torque works quite well, and more mixture=torque works even better.
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