Quote:
Originally Posted by oil pan 4
With a carb and GM HEI ignition I don't think there are a lot of options.
Unless I can use the 0-10v or 4-20ma output on my AEM air fuel meter to signal some sort of aftermarket MSD ignition box (which I don't have yet) to further advance the timing.
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I agree that would be tough to do with just a carb and HEI ignition.
With my engine management system I can pick out just a group of cells that I lower the fuel injector pulse width and increase ignition timing at based on load and rpm. I also run two different fuel/ignition maps, one for lean burn with waste solvent and one with out waste solvent. The fuel map cross over happens by threshold speed, load, TB angle and rpm. When waste solvent is enable I add the solvent manually with a solvent regulator. This is at freeway speed and the waste solvent is a set mass flow. The main injectors increase or decrease their pulse width based on load and rpm. My waste solvent enable MPH window is 50 mph to 70 mph.