Quote:
Originally Posted by Chrisyphus
The OEM oil pan is designed to tolerate over 1.4 lateral G sustained without oil starvation. This is explicitly listed in BMW publications. The situations I see people's oil pressure falling to the high 20s in are not always high-sustained G corners, but it is ALWAYS partial/modulating throttle above 5,000 RPM when VANOS oil volume demands are at their absolute peak.
Is a baffled oil pan a bad thing? No. Absolutely cannot hurt. We just aren't convinced it will fix the real problem- insufficient oil volume from the pump.
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For the sake of post length, I’ll quote a smaller post.
I love your detailed analysis of these topics, I’m curious of what your feedback would be on installing an accusump on the S65. Installing the oil pump gears seems like an absolute no brainer if you already have the oil pan removed, but for those of us who have the larger clearance bearings already and would have to remove the pan a second time to do the gears, it’s a little less DIY friendly.
Is the primary issue the oil pressure drop during high rpm throttle modulation, or is it that there isn’t an adequate amount of oil getting to the main bearings at all times since opening the clearance on the rod bearings? And if it’s the former, does installing an accusump system (installed down stream like near the oil cooler) solve the issue, or no because it wouldn’t be able to increase oil pressure adequately near the main bearings.
Thanks for your insights, love your work 👌