Talk to these guys, they have been very helpful and know the ins and out of this subject with some diverse applications: https://www.rbracing-rsr.com/oilsystems.htm For a good deal on pumps contact Bulent Aliev at EngineGearOnline.com, Buly had a RX powered Cozy Mk-IV, we are using one of his pumps as a turbo scavenge pump. Chrissi CG Products www.CozyGirrrl.com -----Original Message----- From: David Leonard <flyrotary@lancaironline.net> To: Rotary motors in aircraft <flyrotary@lancaironline.net> Sent: Thu, Jan 14, 2016 11:11 am Subject: [FlyRotary] Oil Scavenge Pump vs Custom Oil Pan Hi All, I have decided to install an oil scavenge system to return the oil from Tracy's gear box and perhaps from my turbo as well. I am really getting tired of all the oil getting all over everything. It clearly seems to be coming from the area between the RD1B and engine, which means that it is probably coming past the RD1B oil seal. Tracy calls for a nice big line and downhill only run of the oil to a point that is higher than the oil level in the sump. However, there is precious little elevation drop and I have not been able to achieve those requirements with a gravity only system. If I run the oil level very low in the sump the problem is improved, but I think it is time for a better solution. I am considering either a custom oil pan that allows for a deeper drop of the oil, or a scavenge pump. The benefit of the custom oil pan is that it can be an improvement in weight over the stock pan, and requires no moving parts or power and is unlikely to fail. The scavenge pump is nice because it would be an easier installation and will probably be more effective at fixing my solution, though I do worry about adding another possible failure point. 1) Soliciting pinions on the decision between Scavenge pump and custom oil pan. 2) Recommendations on someone who makes custom oil pans and pickups? 3) If I choose a pump, does that solution require a tank or can the drain lines be connected directly to the pump? This would create a suction on the outlets of the RD1B and or the Turbo, does anyone see a problem with that? Drain oil from the RD1B too fast? Bad for turbo bearings? 4) Would I need 2 pumps for redundancy? I am leaning that way, which means I am leaning more toward custom oil pan. 5) Turbo drain back seem adequate, which means I could use the pump to isolate the Gear Box oil, allowing for different oil there. Thoughts on this option? Thanks for the input! Dave Leonard Turbo Rotary RV-6 N4VY