BTW, after too many years of being to busy to work on my Renesis /
 Glass Goose project, it looks like I may be slowing down enough to
 restart.  Luckily I have been  flying (Skymaster) in the interim.
 Lots of catching up to do!

 You may remember that I have a Bruce Turrentine Renesis 6-port and
 Tracy's EC-2 and redrive.  I see that the EC-2 only supports 4
 injectors, while I have 6 altogether.  Do you know if anyone with
 a similar configuration simply did not use (blocked off) the two
 engine block injector ports (red injectors)?  Or it necessary to
 use all 6 injectors?

 You may also recall that I built a small intake with throttle body
 based on the original intake manifold, so I don't have the long
 runners.  I realize this will produce less HP, but I only need
 about 180-190 -- which might make the center injectors less
 important?  ( I can also re-do the intake relatively easily if
 needed.)

 Thanks,

 Scott Gettings

 Perhaps some one will read this and respond. In theory you do not
 need them with Tracy's EFI. However tuning with Tracy's is always
 a pain in the butt :-)

 It is pretty easy to do your own EFI with a Maximite. The easiest
 hardware control computer in the world to program.

 Not a very steep learning curve. I can help with out a lot of time
 or trouble and you would be doing all 1000 people on here  a big
 favour as it would be open source. You could use all six injectors
 for smother running.


 Paul Lamar


 I will definitely have a lot of catching up to do!  So the
 Maximite will handle both the EFI and ignition coils?  The
 programming is beyond me, but my brother might also help.  I assume
 I could test the Maximite on my RX-8?

 I will look for a source unless you have one handy.

 Scott Gettings.

 CircuitGizmo sells them in the states.

 http://circuitgizmos.com/

 Version 2 is now out with higher performance.

 The web site does not do it justice. Some times I think CG doesn’t
 understand just exactly what it does. It is like a complete DOS
 computer running QB with a solid state 64Gig hard disk.

 "The CGMMSTICK and CGCOLORMAX have the Maximite BASIC (MMBasic)
 interpreter programmed into the PIC32 microcontroller. "

 Not only is the BASIC interpreter programmed into the PIC32
 microcontroller the programming editor and a disk operating system
 is also built in to the microcontroller.

 The Maxm+doc jpg shows a Maximite set up next to another computer
 running the PIC BASIC pdf doc for rapid access to any BASIC
 command info. This is a major breakthrough in the ease of
 programming micro controllers.


 For $57 it is an extreme bargain.

 BTW

 Harbor Freight sells a low cost one cylinder piston engine.
 Perfect for getting your feet wet in EFI.

 Once you get that to work expanding the number of injectors is a
 piece of cake.

 Paul Lamar

 To get on step in the water quicker 250HP might be a good idea. The
 p-port conversion is inexpensive and makes the manifold easier. Put
 two injectors in each intake pipe. For redundancy, set it up to run
 one on each with one Maximite and the other two with another. You
 could set up the ignition the same way. One for leading and the
 other for trailing. Or one to run 1 leading and 2 trailing and the
 other for 1 trailing and 2 leading. Better insurance on keeping the
 power up.

 Dale Davies

 Scott has been on here for many years Dale.

 Paul Lamar

 Thanks for all the great input, everyone!  I will order one or two of
 the computers.

 Do you think I will be able to test its operation on my RX8 if the
 sensors are disconnected? I don't know if the oil metering pump might
 be affected?

 I still have most of the cooling system to do on the plane's Renesis
 engine, so it won't be running any time real soon.  It would be nice
 to test this component separately.

 Scott Gettings.

 I thought about testing the LI ignition on the RX8.
I decided it was more trouble than it was worth because of all the sensors
the stock system uses. I would have had to cut into the wiring harness.

Much much easier to test a cheap one cylinder engine.
I made a electric starter out of a 1/2 drill motor.
I got tired of jerking on the rope.

Hopefully your RX8 is still running fine.

It would be much easier to do it on the engine in the aircraft rather than
the RX8 as any sensor installation wiring would have to be done only once.

Paul Lamar

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