Totally agree with the article... give me 12 or 36 cylinders any day of the
week...
and this article is exactly why engine rpm frequency is mentioned in my above
commentary.
In simple terms the enlightened engine operator is looking for the rpm load
setting
factor that offsets these cylinder firing pulses against the combined resistance
load (torque requested) and centrifugal momentum inertia of all internal
moving components whether 1 or 36 cylinder format... there may generally be
three or even four rpm points where this will occur for each individual engine
and these points are fugitive based upon the changeable factors of fuel, air,
temperature, and mechanical clearances between moving components. This why the
enlightened engine operator is able to quickly discern an out-of-tune state
on a perfectly turned and balanced engine.
This is why, from experience and understanding, extended running of the engine
at 4800rpm, 3800rpm, 1600rpm, 800rpm is not any concern for me. These are the
harmonic frequencies of this individual engine for its set tuned state and
minimal
stressed points. If the engine is not singing the above factors are not
synchronised;
things will simply wear out sooner...
If i want to set the above engine for 5200rpm then it will need further bench
work
on the breathing because at 5200rpm it aint singing at all.
A good place to start for anybody wanting to understand the totality of internal
combustion engines is "Tuning For Speed" - Phil Irving, anybody that says they
know stuff doesnt really know stuff unless they know this book cover to cover.
Its one of my loaded questions when sourcing a suitable engine builder that
i have no prior experience dealing with.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=509790#509790
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