hjtrbo Posted April 4, 2022 Share Posted April 4, 2022 Ok, Seen this mentioned and it got me thinking. Build a square wave oscillator of the appropriate amplitude and frequency range. Flex fuel custom OS. Pay attention to the spark blend map and add in some reasonable numbers to the flex timing table that are well above those in the 98 table. Steady state on the dyno, wind the oscillator up to increase spark. Find MBT or knock limit for load and rpm. Write timing down on a piece of paper. Repeat for next cell. Then repeat for fuel. Am I dreaming or was the guy who mentioned this but with regards to a GM PCM actually onto something? https://forum.efilive.com/showthread.php?13171-E38-Flex-Fuel-On-the-fly-timing-and-fueling-anyone-interested&p=116612&viewfull=1#post116612 Quote Link to comment Share on other sites More sharing options...
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