I'm wondering what AFR you set the in the .bin? I think an AFR setting of about 10:1 would be a good starting point. You might also need to adjust the weight of the fuel? Gas is about 720 grams / liter, Ethanol is about 780 grams / liter.
dave w
I'm wondering what AFR you set the in the .bin? I think an AFR setting of about 10:1 would be a good starting point. You might also need to adjust the weight of the fuel? Gas is about 720 grams / liter, Ethanol is about 780 grams / liter.
dave w
the commanded AFR is 9.7:1, so very close to what you said. Where would I adjust the weight of the fuel?
I've never seen weight of fuel in any masks... now if your talking the size of injectors? GM does have settings for LB/HR. I hope it's in $DA2 or you'll have to find it in the dissasembly and add it to the $DA2 definition/Mask.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Yeah I have injector size and that is taken care of.
I've seen fuel density in the Black Box PCM's see attached. I was thinking maybe the $DA2 might have fuel density also.
Based on what I've seen in Flex Fuel PCM's (2005 and newer), it seems the AFR is the only thing that changes. It seems that fuel and spark tables are the same, regardless of the Ethanol %. I would think with the $DA2 set to about 10:1 AFR, the original fuel and spark tables could be used / would be close?
dave w
Yeah I wish I had that much control but i don't.
These are the only tables I have, and under constants that are fueling related I only have Stoich AFR, min and max BLM and injector size.
tables.jpg
fuel density isn't special, if your fuel is 2% lighter than gasoline, just roll that into your injector constant.
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