I decided early on in the project to fit an inverted oil system as I didn't like the idea of seeing no oil pressure even for short periods of time during aerobatics and I wished to do sustained negative g.
The choice was Raven or Christen. The two are virtually identical and the Christen manual can be found here and the Raven ones here and here.
The basic Raven set is shown in the first image and the second shows the sump locations on the Suerior Cold Air Inductiion Sump.
When in normal flight the oil is picked up (Normal Supply - A) and sent to the sump screen (D) and fed to the oil pump. When inverted the oil is now picked up from the Vac Adaptor and sent to the sump screen (D). In normal flight the engine breathes from the normal breather location into the Oil Separator and returned to the sump (C). When inverted the return (C) now becomes the breather and oil is returned via the normal breather location. In both cases the vent goes overboard.
As I bought my engine from Aero Sport Power they acquired the Raven kit and fitted the Vac Adaptor with my SD-8 standby alternator, the sump plug and the angled screen fiting (D) - saved me a lot of time/hassle.
I was advised by Rob at Raven that the best pick up location would be A (make sure you ask for the straight fitting - you cannot thread in a 90 due to sump interference but you will probably need a swivel 90 for this location).
Rob also recommended E as the return and either B or C as the alternative. E was out due to the mixture bracket (see separate log) and B interfered with the exhaust (I used B for the oil drain) so I used C as the normal return.
