Questions on EFI

David G · Apr 7, 2013

I have been working on an EFI project, and have gotten technical and moral questions.

I will have about a grand in it when done.

I am doing it because I do automation and instrumentation as a career with farming and mechanic work as a hobby. I am finding that this is interesting for my boy, so it is getting him involved. I am keeping all the original parts so it can be put back if wanted.

I expect this to be extremely reliable and to save fuel. My MH44 is quite thirsty, so any fuel savings will be appreciated. I am already seeing that the engine is running richer than it should and that I will be able to adjust the timing based on load to prevent pinging.

Nebraskafarmhand · Apr 7, 2013

I think you will have a chronic rich or lean condition without having an O2, IAT, and several other sensors to provide feedback for your controller. EFI mechanically is simple, the programming is what's complicated.

David G · Apr 7, 2013

I have the O2 sensor running now, is running way rich with carburetor. I am hoping the injection provides better atomization and can be leaner.

oldtanker · Apr 7, 2013

It will be interesting to see haow this turns out.

Should have the controller setting the timing via the controller/throttle setting.

My question is the system going to be built that it will last on a working tractor?

Rick

David G · Apr 7, 2013

Oldtanker,

We will have to see the durability, but the electronics are the same as used on production equipment.

I am really learning how changes in mixture and timing affect an engine. The advantage of this is that I can adjust each one based on temperatures and loading.

Tractors are at a disadvantage by not having an accelerator pump because you run the mixture richer to compensate for changes in throttle, and not having vacuum advance also makes the timing less optimum.

ben there · Apr 7, 2013

Whenever you get the injection hooked up,replace the O2 sensor.I'm sure running on a carb has sooted it up already.

jm. · Apr 7, 2013

I built several of those tractor for antique pulling years ago and tried a lot of different set ups but nothing as nice as yours. I am really following your results and very interested. We found out early on that gas and timing really made a lot of difference in what the engine would put out.

Jim in MN · Apr 7, 2013

After one of your earlier posts I spent an hour at diyautotune.com reading up on their stuff. What you are doing is pretty cool and I hope you continue to share your progress.

Anonymous-0 · Apr 7, 2013

I am finding your project very interesting. I used an Allis D14 for a few years, it was extremely gas thirsty for the power it had. I often thought a higher compression fuel injected gasoline engine with computer controlled spark advance with a knock sensor would be competitive with a diesel in fuel economy.

Rick Kr · Apr 7, 2013

David,
Was just thinking... are you going to try to incorporate a knock sensor to back off the timing if necessary?

Rick

davejoe · Apr 7, 2013

Could you just use a wideband O2 sensor? Dave

Questions on EFI

David G

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Nebraskafarmhand

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David G

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oldtanker

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David G

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ben there

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jm.

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Jim in MN

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Anonymous-0

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Rick Kr

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davejoe

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