Originally Posted by
ralphierace13
so roelof
what about these motors with the longer stroke they say its for more torque if so how?
also wouldn't u want more torque when u have like a heavier car to pull like an rc truck or like when u stuck in the mud? with the power to weight ratio from todays motors y do we even need more torque ? I rather have the faster acceleration no?
How further the crankpin is located from the center the more force you can create on the output w/o needing more combustion power. I also believe the larger movement of the piston will make the pump to suck up the mixture a little bit better.
More torque is not only about the stroke, it is more about the height and width of the exhaust port together with how much fuel you can burn. The longer the combustion stroke is before the exhaust opens the more power it has. The same is with the barrel of a gun.
Looking at F1, more power comes from more combustions per seccond, to reach that a short stroke engine is needed due the physical speed limitations of the pistons and lubrication.
As Picco has succes with their extra long stroke engines Novarossi did not do well with their xtra long stroke Keep-on and Mito models as their current topmodel is the normal long stroke 35WC.
Longer strokes do not have to be better als also with the amount of ports. It is more about timings, dimensions and materials to make a good engine.