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>.. In practice they have perhaps a 30%
>advantage
OK, so I was wrong, it's nut just under 100%.... but then I just ran some
numbers on two engines I am familiar with and I come up with a 50% advantage
as far as hp/cuin.
1) A 2.4L (144cuin) NA 4 stroke Diesel rated at 62hp means 0.431 hp/cuin.
2) A 3-53 Detroit (159 cuin) NA (other than the scavenger pump) 2 stroke
Diesel rated at 103hp means 0.648 hp/cuin.
That's 50% higher.
But then getting back to the original question, why not put in a Cummins
like the military is doing in thier repower program?
je
and then they need to turn a higher rpm to get the horsepower
>because the lack of torque compared to the slower turning four strokes.
>Meanwhile, the four strokes, with the larger swept area, per revolution,
>typically burn less fuel at the same horsepower output.
>
>
This archive was generated by hypermail 2b29 : Tue Apr 04 2000 - 21:57:30 PDT