Quote:
Originally Posted by oil pan 4
If you slow the engine down too much you fall out of its efficiency range. Even worse yet, combustion and crank shafts harmonics tear up the rod bearings.
Figure out the lowest recommend cruise rpm and gear for that.
Pushing the operating range down to say 1,000 rpm is just going to ruin the engine.
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I have considered that. My plan are for our highway speeds of 80MPH.
These are both low RPM motors, the Ford 4.6 comes with a factory Ford version of the 85/90 Chevy Tune port injection system with the extra that it has a Sequential injection system which has the better use of fuel and may get great MPG, VS the Chevy batch injection system... On the other hand I can get a special add on board to allow a lean burn cruse customize to its best setting for the Van.
Both motors are low RPM motors, both are unable to run faster than 5500 RPMs and both are past their power peek curve (4500) at those points.
Both have lockup Torque convertors.
Both motors seem to have plenty of torque at around 1000 RPMs with my target range of around 1500 RPMs.
From all I have read and tested I really think this will work.
Thanks for your input.
Rich