Joe,

 

                Apart from plug fouling as already mentioned, the main bearing oil scavenging would be a trick to fix.  Looking at the motor end-on from the trany end, there is an oil gallery inside the casting from the main bearing that runs down and to the right.  (see pic RED line).  Plugs-up it runs down and to the left.  Plugs down it would have to run up-hill.  Plan B would be to drill and tap an external line from that area of the casing to the sump.  I can’t remember if the front main bearing just drains into the oil pump cover or if there is a gallery there was well.

 

                You would have to seal up the oil filler hole and the dip-stick hole and any other spot oil wants to dribble out.

 

Neil Kruiswyk

Another rotary project in the works…