[VAC] Re: Non-conventional pullers

["Carol and Oliver Filippi" <ofilippi@xxxxxxxxxxxxx>]

It used to be that pulling power was directly related to torque [which is
engine torque and gearing - transmission and rear axle ratio)  Engine torque
is primarily a function of engine displacement (volume of the cylinders).
Thus, given the proper gearing, the size (displacement) of the engine was
THE critical factor for overall performance.

Until now!  Some modern gasoline engines use more complex designs to
maximize performance.  The most notable to this discussion is variable valve
timing - which is part of the Toyota's recent engine design available in its
pickup.  This technology allows the smaller engine to reach a high torque
output at relatively low RPM and then maintain it throughout its RPM range.

Thus Toyota can get away with an engine quite a bit smaller than what was
once considered minimum size.

Oliver Filippi