Paul

   With the TTC Engines ability to handle very high manifold pressures can
   you add a pressure sensor to the engine case? It would be useful to plot
   static pressure, manifold pressure and finally engine case pressure in
   order to determine at what pressure the rotor seals begin to fail.

   Erik Wahlstrom

   IMHO The Mazda steel lined aluminum rotor housing will never expand enough
   to allow blow by with out cracking first. I have no idea what pressure
   that would be. I am guessing. That might be several thousand psi :-)

   Probably well over double the pressure we are getting.

   The Mazda structure is EXTREMELY strong with 17 half inch
   bolts holding it together. One half inch bolt will take 30,000
   pounds to break in tension. That is thirty thousand pounds!!!!!!.

   The apex seals are silicon nitride. One of the strongest and hardest
   material known to man. Mistral did everything in their power
   and they were never able to crack one in an engine including
   a lot of pre ignition.

   Good luck breaking a Mazda engine or SN apex seal :-)
   Try putting a large firecracker in the combustion chamber :-)

   Paul Lamar



Crank case pressure is a result of end gap size in the side seal to corner seal fit,
the corner seal to apex seal fit and the corner seal to corner seal bore fit.

I start side seal end clearance at zero. Replace at .0025" Use the old
solid corner seals, not the ones with the rubber plug. Use the largest
breather hose diameter possible.

Lynn E. Hanover


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