It would be real easy for Tracy to add a crank angle sensor check.
   If the intake manifold pressure suddenly went to below 7.5 psi or 15
   inches
   of Hg indicating the engine was turning over and the computer did
   not see
   a signal from the crank angle sensor it could put out an error message.

   Paul Lamar

Paul, While I am sure this is technically correct I think Tracy needs to
"Kill the Engineer" and work on getting the software more bullet proof.
If the system has too many variables most people will be overwhelmed.
Tracy needs to be sure the system is debugged and easier to set up. You
have spoken about the trouble you had on the dyno. And you are far more
electronically savy than 99.9999999999% of the people that will ever use
the system. He has built in enough test features now that most people
won't use them all. IMHO
Bill Jepson


He has been at it long enough. The big problem with EFI is the wiring
is different for each airplane and each builder. In a production car they
are all the same. Any bugs due to grounding problems, wiring problems
and or EMI are sorted out long before it goes into production and then they
are all the same. IMHO it is inappropriate technology for an experimental aircraft
engine. It is also over kill.  I hope to get the simple mechanical
fuel injection working in the next few weeks. Larry is heavily involved with
the Reno racer so that will be over this weekend. Are you going? I'll be
up there on Saturday and I will have a pit pass to take some pictures.

Paul Lamar ...No rotor no motor.


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