Hi TJ,

 

Smoke is very hard to clear up.   Visibility here in Fla was less than 1/4 mile all day.  I thought it was the fires in Georgia & N. Florida but it is possible that it was from a certain Email list purveyor in California :-0

 

Seriously, the C/S prop story about not being compatible with the EC2 is just that - Smoke.   The engine load is accurately reflected by Manifold pressure and RPM.  These are the primary inputs to the EC2 so it has no problem tracking the variations caused by a CS prop.  I don't have the time to elaborate but it is actually harder to match the fuel requirements of a fixed pitch prop in most circumstances.  The changes in volumetric efficiency due to rpm change are eliminated with a CS prop.

 

The full story about the "Dyno incompatibility" is a longer one which I will abbreviate out of necessity.

 

 It started with Paul's trip to Mazdatrix to test Mark Supenski's P Port engine with his beloved slide throttle (which had never run before).   As it happens, there is no manifold on an engine in this configuration so it is difficult to measure manifold pressure.  Where are you going to get manifold pressure from?  (did I mention that manifold pressure was a primary input to the EC2?)  To make matters worse, Paul was so confident in his abilities to make anything work (even an EFI system that he had zero experience with) that he didn't bother to take the EC2 instructions with him to Mazdatrix.    Given these circumstances, it was no surprise that the dyno run was a dismal failure.  Dave at Mazdatrix yanked everything off the engine, put a webber carb and manifold on it and got it running in order to get a pull on the dyno.

 

And so the story of how the EC2 will not run on a Dyno (and by extension, with a CS prop) was born. 

 

Tracy