Speaking of P ports.  Jerry do you need to know the exact ID dimension

of

the P-port used in the LeMans?  A little late perhaps since I see you
already have it bonded in.

Doug in Japan

Doug,
Tell us anyway!
George ( down under)

Douglas Fir wrote:

George

I posted this on 9/26

Perhaps you didn't catch it.

Jerry I checked with my friend and my notes from that meeting.  The Lemans
Port opening in the rotor housing is 51mm [2"] in diameter.  As you might know
the manifold bolts to the engine and curves upwards 90 degrees.  The ID in
this short section is 50mm [2"].  On top of this manifold's horizontal flange is
bolted another variable length manifold that is curved at a approximate
angle of 45 degrees back towards the engine. The inside OD in this part is
51mm [2"].

As for different tuning lengths and pressures I will need some help
interpreting the graph. I'll bring it with me when I come to USA next month.
 The data was gathered  2-22-1989 BTW.

My friend believes the best BSFC of the NA 13B would be at air/fuel ratios
of 16  and 210 grams/PS/Hour.  That is about 0.462.  Perhaps Tracy has
experience running on leaner mixtures.

Doug in Japan

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