OT max economy, engine stress

[Gary Derian]

Oil pressure is only needed to get oil TO the bearing.  Typically 10 psi per
1000 rpm is necessary.  Engines with large diameter mains need more pressure
to fight the centrifugal force.  Once the oil is in the bearing, the load is
WAY more than oil pressure.  Properly designed crankshafts introduce oil to
the part of the bearing with the lowest loads.  If the crank is through
drilled and oil fed from the end, 5 to 10 psi is enough for any rpm.

Gary Derian <gderian at oh.verio.com>


> Prob with putting high load on engine with low rpm is that the oil
> pressure is usually lower at lower rpm's thus smaller film of oil
> between crank and main journal bearings and rod and rod bearings and cam
> and cam bearings and rockers and rocker pedestals, etc...
>
> More chance for metal to metal contact....thus more chance for
> scuffing/scarring of metal and more chance for spinning bearings....
>
> Heating the fuel DOES atomize the fuel better, however the hotter the
> mixture the less dense the mixture as well, it's a trade off and there's
> definitely a point at whcih heating the micture for atomization is
> detrimental to combustion.  Also predetonation is more achievable at
> higher inlet temps, as I'm sure you already know...
>
> Later!
>
> Todd....!!
>