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 an
 aluminum front housing where the stock oil pump is problematic.

 Paul Lamar


 Hey Barry B.

 Could you show us the jig set-up you use to cut the corner seals
 like that? Thx!

 Dan Gorsline.

 My Photobucket file blocks any attempts to download... so here is a
 diagram. Made with 1" angle iron. A corner of a rotor,  and a Dremel
 diamond disc. Barry Bordes


 Brilliant idea Barry. I consider this an important improvement in the
 rotary sealing. Solves two problems. Hand fitting the side seals
 during overhaul and improving the side seal sealing. This results in
 a small improvement in BSFC and power. In some cases when the hand
 fitting is poorly done a larger improvement :-) Felix  Wankel would
 like it.

 You should sell these.

 You need a web site Barry.

 Paul Lamar


Hey Barry B.

Thx for the drawing. I'm not fully clear at whats happening..are
you using one of the other corner seal holes as a pivot point
for the jig? You need a website and YouTube vids. You clearly
 know some good rotary tricks. Please try again to send pics
(or better yet, video!) of jig in action.

Thx again!

Dan Gorsline.


Barry is using an old rotor to hold the corner seal
while he slots it with a dremal tool. This allows a little lee way
in the length of the side seal and does a better job of sealing
the corner seal end.

Here is a quick 3D for Barry.

Paul Lamar

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