EGOR testing

[Bruce]

You have no idea how neat that sounds
Bruce



> It was a really nice day today.  I went out and welded 
> up a 22" extension for the 2 1/4" tail pipe on my 79
> Eldorado.  That's the one with an ANALOG injection
> computer.  I mounted my EGOR probe in the 
> straight section, 14" from the outlet.  Did someone
> say it should be 16"?  Warmed up the probe, then
> started the engine.
> 
> IT WORKS!!
> 
> Sure enough, starts pretty rich, comes off choke 
> closer to stoich, idles a little rich.  When the engine 
> is hesitating, I see its in the red.  I wonder if its the
> fuel curve or the fuel pressure; now I need to get 
> that fuel pressure gauge working.
> 
> This design is running the probe internal calibration 
> resistor, so it should be accurate.  The guys with
> bottles of calibration gasses will need to check this.
> It also has a switch to allow using air for calibration,
> based on the estimate here that air looks about 
> 3 times as lean to the probe as 21.44:1 A/F.
> 
> Thanks to the EGOR group for supplying the info 
> needed to get this rolling.  Some more testing is
> in order; haven't gotten it on a carb car yet.  I got
> the scope out in the car and checked a few things.
> Sure enough, the extra capacitor I DID NOT put in
> to stabilize the differentiator, WAS NOT stabilizing
> it in some situations.  There was a trace of 12 KHZ
> oscillation over in the rich area, although it didn't
> really seem to bother the output which filtered it out.
> Retune that a tad, but later.
> 
> After a few more trials, an easy way to build copies 
> would be good.  Getting a PC board together will
> be a non trivial project, the biggest item getting a 
> layout and routing.  Actually making the boards 
> just boils down to money.  But there are some 
> offers to help, I don't know just how that will go.  
> Thanks to all assistance past and future.
> 
> Bruce Roe

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