Quote:
Originally Posted by Irace86.2.0
So what you have found is that the inlet is inadequate because sustained rpms leads to a drop in inlet pressure, and that leads to cavitation, right?
A few points of confusion:
--Shouldn't cavitation lead to a more significant drop in outlet pressure if that is the cause of the oil starvation, and you showed only a small difference in outlet pressures?
--If cavitation is happening then couldn't that metal debris be a cause of bearing failure? Moreover, shouldn't it show up in an engine oil test as metal in the oil?
--If this is the cause of oil starvation then couldn't this be replicated on a dyno or something, meaning, if it is just sustained rpms, and not sustained lateral g's or something else commonly related to track oil starvation, then couldn't it be replicated in a static environment? Is it common for oil starvation failure to happen, for instance, during a top speed run (ie long sustained rpms)?
|
1. Yes I also expected to see a bigger increase in outlet pressure, itīs still a little mistery to me.
2. The ammount of aluminum it erodes is insignificant (probably less than 1.0 g). I donīt think it would show in an UOA or cause any damage. The importance of finding it is that itīs hard evidence that cavitation is happening. Iīd love to see a close up pic of that part of a brand new oil pump.
3. Yes absolutely. My bearing failures where never at the track with high lateral gīs like to think about that. They happened accelerating in a straight line, at high RPMs. It couldīve happened at the dyno, I just wasnīt there.