If I don't make it for some strange reason (I am flying standby)
   you will need some tiny test clips to grab on to Tracy pressure sensor.
   You can buy them in Radio Shack, Mouser or Digi Key. I'll pack some
   but just in case you should get some.

   Measure the pulse close to the intake manifold and compare it with
   the output of the vacuum can going to the pressure sensor.
   Tracy has two pressure sensors so one can be used to run the engine
   and the other to the output of the can or vice versa.

   Larry suggested a coil of 1/8th OD tubing works well to damp
   the pulses. Worth a try.

   Any questions?
   --
   Paul Lamar ...No rotor no motor.

   Mark, if you get a chance next week  please solder up a 37 pin D sub
   min for power
   and gnd for my computer. Then we won't have to open up yours to
   get to the pressure sensors. That is if I make it there.

   Here are some more pictures.
   --
   Paul Lamar ...No rotor no motor.

   OK I made it.

   I won't keep you in suspense.

   Mark, Doc and I got the slide throttle P-port EFI 240 HP engine
   running. I was very happy indeed.
   No problems. We changed three major things. We installed a $7
   mechanical fuel pressure
   gauge which, IMHO is absolutely necessary  when you are first
   starting up an
   EFI rotary engine. You need real confidence in these sorts of
   things. You can't
   be messing around with some EFI sensor you are not sure is really
   telling you the
   truth. We set the fuel pump pressure up from 35 psi to 60 psi.
   Changing the pressure
   changes the whole look up table up or down. Up for richer down for
   leaner.
   In and of itself this did not help. We installed a pulse damper can
   in the vacuum
   line to the pressure sensors. The results of this so far are still
   indeterminate.
   The biggie was setting the timing correctly. More about that latter.
   Once we did that
   the P-port engine fired right up with less than two blades and ran
   smoothly at about
   2000 engine RPM (700 prop RPM). We pushed it out of the hangar and
   started it up
   again. Again no problem. We had it up to 4500 engine RPM. We started
   it two or three times
   no problem. Each time it started right up and ran the same. The
   altitude at Marks
   hangar is 6000 feet.

   It was getting late so we stopped and went home while we were ahead.
   Mark probably
   went out to the hangar on Sunday and ran it some more  so I can
   hardly wait to get
   his reports. I left early Sunday morning. Thanks for dinner and
   putting me up Mark.

   Thanks Doc for showing up with the bit scope. Unfortunately we did
   not get the
   engine running in time to do R&D on the intake manifold pulse problem.
   It is running fine with the pulse damper can so we can leave it at
   that for now.

   Paul Lamar ...No rotor no motor.


Very cool..

What do you think of the sound of that exhaust system?

Matt-

I hardly noticed. I have heard the rotary so often I did not pay any attention.
It was not overly loud for a rotary. If anything I have heard louder ones.