Dry Sump Disassembly

Another "unknown" when I received 06 car was the condition of the Dry Sump. This design was used on the 2005 and 2006 Auburn FSAE cars and then retired, mostly due to weight and complexity. The pan, pumps, reservoir, and all lines add about 10 pounds to the car. To the best of my knowledge (Someone correct me if i'm wrong) the team has only experienced one dry sump failure. This was when the jet nut came off and was sucked into the scavenge pump thereby breaking the drive chain and ruining the pump. This design has a few benefits that help offset the weight a bit such as:

• The engine never starves for oil when cornering or braking at high G's
• The CG of the entire car can be lowered over an inch by dropping the engine as close to the ground as possible
• The Auburn dry sump design packages the scavenge pumps inside the crankcase so any pump leakage is inconsequential and will not lead to a DNF
• By employing a spur gear drive from the engine to scavenge pumps the pan can be easily removed from the car without having to disconnect a chain

Excellent Senior Design Dry Sump Project "PDF" by University of Michigan 


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My current plan is to refurbish the 05-06 design dry sump and add the following improvements after the car is functional:

• Re-design the plate that connects the fittings on the side of the pan. The O-rings do not seal well and leak. Currently I'm leaning toward bonding in the tubes and incorporating Wiggins Clamps on the ends (images below)
• Re-Plumb the entire system 
• Move the dry sump reservoir from behind the drivers back to inside a nugget of space in the left rear A-arms

             

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Disassembly Photos

A New #25 chain is definitely on the list of things to order. This time without a master link

Rear Scavenge Line

Mounting wedge for rear scavenge line

The bottom right hole is where the oil is fed to the OE pressure pump
The channels on the top connect the scavenge pumps to the oil scavenge line on the side of the pan

The scavenge pump housings use the OE Honda georotor style pumps