Well it is still winter

David G · Feb 10, 2019

The talk about spark advance, distributor/magneto and carburetor mixtures got me thinking.

I made up the advance and air fuel (AFR) tables when I did the EFI MH44.

I am posting them here.

David G · Feb 10, 2019

RPM goes across left to right.

Manifold pressure goes from bottom to top, it idles about 25, WOT is about 90.

I assumed peak torque was about 900 RPM.

buickanddeere · Feb 10, 2019

Airflow is in percent 0-100 but showing 20-90% ?
Mixture is richer than I expected .
Is there a grams weight for the airflow ? Is this speed density or using a MAF ?

David G · Feb 10, 2019

It is actually manifold pressure (MAP) in kilo pascals, so 101 = 1 atmosphere.

WOT will approach atmosphere

David G · Feb 10, 2019

My tractor would not idle well above 14.5 AFR, and I richened it up good at load to prevent piston burning.

I do not know if these are ideal numbers, they just worked OK.

Oliver 500 Wa · Feb 10, 2019

Open loop or closed? If closed loop what percentage of trim do you allow?

David G · Feb 10, 2019

I stand corrected, it is load %

David G · Feb 10, 2019

It has been 3 years, I am trying to remember.

I have autotune turned on, the tune will try to meet these AFR settings, I think 1% per step with 10% total.

I really would not mind updating the AFR table, so suggestions are welcome.

SVcummins · Feb 10, 2019

What is this on

Well it is still winter

David G

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David G

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buickanddeere

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David G

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David G

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Oliver 500 Wa

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David G

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