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


I agree with Lynn Hanover on controlling Blow-By....  but I cut the corner
\seals for zero clearance a shown in the attachment to avoid locking
interference with the side seals.

Barry Bordes

Not a problem for a dry sump system. A little blow by helps.

I highly recommend it for any aircraft application as one can use a better
oil pump and up the oil pressure. Particularly with and aluminum front
housing where the stock oil pump is problematic.

Paul Lamar

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