but the speculation that oil entering the cylinders on one bank reduces octane rating as the reasoning is by inferrence and not sound (it would take a tremendous disparity of oil consumption to do this).
an oiling disparity between the banks would have its most significant effect in cylinder cooling, for which the oil system is equally relied upon as it is parts lubricant. put simply the oil system cools the internals (skirts, rods, crank, impellers) and the water system cools the heads.
it's easy to figure out, if it's uneven heating then the clockwise spinning 605A would have the higher comp on the aircraft-port bank (by convention termed right bank viewed from the front), if it's oil passage lowering octane then the same bank should be lower compression.
And from memory the 605A has higher compression on the right (front, ie. aircraft-port) bank.
This would be easy to check.
plus it's just more technically sound.
an oiling disparity between the banks would have its most significant effect in cylinder cooling, for which the oil system is equally relied upon as it is parts lubricant. put simply the oil system cools the internals (skirts, rods, crank, impellers) and the water system cools the heads.
it's easy to figure out, if it's uneven heating then the clockwise spinning 605A would have the higher comp on the aircraft-port bank (by convention termed right bank viewed from the front), if it's oil passage lowering octane then the same bank should be lower compression.
And from memory the 605A has higher compression on the right (front, ie. aircraft-port) bank.
This would be easy to check.
plus it's just more technically sound.