Quote:
Originally Posted by tdott
While I agree with a lot of your posts, I don't think that is a fair assessment of the data here, just a cherry picked data point to try to prove your point.
This makes your point less impactful imo.
"the amount of decrease is between 2-3 PSI, over a 70+ PSI average. Assuming the 73 PSI average, a 3 PSI pressure drop is equal to 4% of the total. Whether it was the 5%, 30%, or 50% throttle input, the results were all the same: a 2-3 PSI drop over a 73 PSI average. This is proof positive that the S65 variable displacement oil pump is doing its job."
BE summary below, copied from the thread linked above.
Why can't someone produce similar data to prove their theory? Esp when claiming to fix the problem and are selling a solution.
|
Their summary lacks a ton of nuance- just because the overall system pressure drop was sub-5% does not tell the whole story of what is going on in the rod and main bearings.
The main bearing is fed enough oil for itself and the rod bearing. As I mentioned in my first response to this thread, increasing the clearance of the BE bearings from an early-gen S65 results in a net decrease in rod-bearing restriction of up to 98%. This means that one of the primary restrictions for the main bearing's oil flow is effectively removed. Whereas the main was originally probably supposed to receive 55-60% of the oil volume going to it, it could now be receiving as little as 10-20% of the flow, despite being fed from an oil galley with 70 PSI.