Question regarding torque

[theNUDdistBUDDhist]

hi guyz heres a nother.

simply put where does torque come from? (yes we all know the engine)

What simgle rocipracting assembly part will improve torque most? (longer rods? bigger crank [not in mass in demetion]? or wider pistons for higher compression?

thank you for the help, any and all -- MoNK

[Q45tech]

The parametric equation used by all engineers to simulate an engine indicates that bore is almost twice as important as stroke in creating BMEP.http://www.engr.colostate.edu/....html

Once you get to a static 10.5 CR any increase is a diminishing return.

Rods length has little effect at 4,000 rpm where most peak torque occurs on Nissan engines.

The primary determinate of torque is the displacement [and volumetric fill efficiency] and it is really hard to exceed 75 lb/ft per liter even with 4 valves as long as a plenum and single used. Notice Ferrari and others use a TB per bank to tweek 1-3 lb/ft per liter more......the plenum gets smaller and tuning tighter.

[theNUDdistBUDDhist]

thank you. this was/is very helpful. -- MoNK