Posted by David G on August 17, 2018 at 16:53:43 from (209.181.208.169):
The MH44 EFI runs real good, needs some cold weather tuning.
I would not leave the O2 sensor on once tuning was done, pops the cost up about $400.
I would like to make something that bolts on where the Zenith was, tired of all the harnesses and mounting, it is just to much work to mount all that. I really liked the picture that was posted of the integral unit.
I would make the throttle bore bigger, and make a reducer that slides in to size it according to the engine, no sense having huge throttle plate on small engine. An original throttle plate would then be used so it matches the reducer bore.
I do think it is better to mount the fuel injector upwards in the manifold, this reduces the problem with cold manifolds and icing.
I would almost be tempted to mount the fuel pump in the tank.
I used the Microsquirt ECM, but I think I can do the required functionality with an Arduino, at 1/10 the cost. The tuner studio program I use has a build for the Arduino, so user interface would be the same.
My goal would be cut the cost from $1200 to $500 and include spark control.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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