Yet another Accusump Install - but different

[thstone]

Originally Posted by Gelbster

Pedro had an Accusump fitted to his Track Boxster.
He replaced it with a Technosump. You can read about it on his site:
Make it your own Technical Article by Pedro

I also have a TechnoSump waiting to be installed in my Spec Boxster (planned for a Thanksgiving weekend installation). I chose the TechnoSump over the Accusump for several reasons that I'll discuss in the post for the install.

[steved0x]

Originally Posted by thstone

I also have a TechnoSump waiting to be installed in my Spec Boxster (planned for a Thanksgiving weekend installation). I chose the TechnoSump over the Accusump for several reasons that I'll discuss in the post for the install.

I'm interested to see that - I have a 3 QT accusump that I haven't installed yet - I wanted to see what my oil pressure was like first. I had my first track weekend with the oil pressure gauge and saw it dropping in the sweepers. To me that means some air was getting sucked in (unless there is another explanation for oil pressure dropping? Can oil pooling in the heads "block" the oil flow somehow and drop pressure?)

It stayed above 20 but it still dropped.

If it is from sucking air, then I wonder if a deeper sump can provide oil and prevent/postpone this.

[Gelbster]

Not original ideas of mine - just re-hashed for a speed read.
When the oil 'sloshes' around in turns it climbs vertical surfaces.The oil gets foamy because of the whirring mechanicals it collides with.Think whisk? The oil climbs high enough to leave the oil pickup sucking oil foam. So the pressure drops. The liquid-oil level also drops even after the engine sits for a while. All those bubbles need to coalesce and burst before the level is restored.
Having a deep sump+extended pickup + a well designed horizontal and vertical baffle keeps the pickup submerged.It should also reduce the 'climbing' problem.
Why does the oil foam so much? because it has way too much detergent in it for the M96. There are low foam oils which may be better suited to this driving situation than the usually recommended oil. This has been discussed at length before.
If you run a +2qt. deep sump and the oil 1/2 way between max/min that should also prevent the AOS becoming 'swamped'.
disclaimer- I am not an expert in this subject but have already made all the mods I mentioned to my M96.

[ianacole]

Originally Posted by thstone

I also have a TechnoSump waiting to be installed in my Spec Boxster (planned for a Thanksgiving weekend installation). I chose the TechnoSump over the Accusump for several reasons that I'll discuss in the post for the install.

Are you worried the additional "height" of the pan will cause it to catch on curbing or in an off?