Subject: P-Porting
From: ACRE NL
Date: 11/17/2002, 4:18 AM


 >  > Has anyone on this list Peripheral Ported there own housing?
If so was
 it
 > difficult and how does
 >  > one start? Thanks for any advice.  Tom Webber
 >
 >  Lynn Hanover did.
 >
 >  Paul Lamar


 Open the engine and transfer the intake port opening and closing
events onto
 the rotor housing at the apex seal. Extend the lines across the face
of the
 housing with a straight edge. Those two lines will be the top and
bottom of a
 very mild P port. Leave about 5/8" on the sides. Look at Paul Yaw's
site at:
 http://personal.riverusers.com/~yawpower/
 He has a great series on This. His pieces are perfect. He may have
prices for
 doing the conversion.

 Lynn E. Hanover

Thanks for writing that Lynn?   It clears up my "thinking" on the
subject.  Would the intake port be timed the same for a six port as a
four port?   My engine is a six port.  I have one 12A and two 13B
rotor housings  to practice on.  If they are not enough, I will get
more.   At some point, however, I will be able to do the PP
modification.   Tom if you are thinking of doing this, I would
appreciate a step by step account.  I will do the same for you.

   Although Racing Beat insists on  a new housing, I don't see any
reason why a  used housing that is in good shape cannot be used.
Racing Beat wants $900.00 for a PP housing.   I bet we can do it for
$200.00 if we don't have to replace the housing.  I don't want to
under estimate the difficulties but it looks like boring two holes
and turning two inserts to me.       Jerry
--

J-Wind Designs
Motor Mount Plates,  Engine mounts
j-winddesigns@thegrid.net
831-385-0908

Jerry,
I just saw an add for a 13b motor (no year) PP for $1,000.00 Aust dollars
which is
about $500 US. However I suspect it's a racing motor - they do the PP
professionally down here. I can enquire to the cost if you wish.
George (down under)

 
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