I had a talk with Jim Mederer at sevenstock  on things he has 
discovered running the three rotor at the 900 HP level for about
200 to 300 hours on the dyno. Apparently the Achilles heel is
the Inconel apex seal springs despite the use of expensive and light
weight ceramic apex seals. Jim's theory is the engine is distorted
due to one side being hot and the other relatively cool.
This causes the apex seal motion that is fatiguing the springs.

He did say that he needs 48 ounces of two cycle oil per eleven gallons
of fuel or the engine wears rapidly. He also feels that a capacitor
discharge ignition system is essential to keep the plugs
from fouling at this oiling level. This is just a guess as he has never
run the engine on anything other than a MSD multi spark CDI system.
One system per spark plug.

Here is a picture of Jim and the Mazda Leman race car chassis engineer
discussing the fine points of deflection steer on the Leman winning
four rotor race car.

Paul Lamar
 
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