In article <199511151529.PAA07030@sauron.thlogic.com>,
Jeremy DuBois <jer@thlogic.com> wrote:
> With a long stroke, the pistons and rods have to move further per stroke
> than on a short stroke engine. So at a given RPM they're going to be moving
> faster. That means more stress on them at that given RPM, and that's why
> they can't rev as high.
On the 2500 and 1500 it is not in fact the pistons nor rods that give
up the ghost at high RPM. It is the crancshaft itself, where extensive
internal vibrations sets in, leading to inceased bearing stresses, and
ultimately self destruction. On the 2500, 6200 RPM is being mentioned as
a very critical point.
That is why it is so essential to have the correct harmonic damper, and
also to have the crankshaft etc. properly balanced.
Egil
--
Email: egilk@oslonett.no Voice: +47 22523641/92022780 Fax: +47 22525899
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