Hondata

Probably going to pull the trigger on the "4" soon. Had a couple questions about it and the flex fuel options:

1) I have everything tuned well and have been running E85 for the past 6+ years. I notice the fuel/timing tables seem to be set with "0% ethanol" as the baseline or zero and increase fuel / ignition advance from there. Can these tables go negative? ie - I would most likely use E85 as the base / zero and remove fuel (negative numbers) and retard timing (negative advance) from there. Is it acceptable to put negative in the cells?

2) I notice some of the tables in "Flex Fuel" are based on 'engine coolant temp' instead of 'ethanol %' (ie Ethanol ECT Compensation, Ethanol Cranking ECT Compensation) How do these relate to ethanol %? It seems like they are simply changing fuel based on coolant temp (which is already covered under "Fuel Compensation" and "Fuel Trim")?

3) Is there a recommended ethanol sensor for use with this? and/or what type and range of E sensor output is required?

Thanks!

1. No. Just reduce your overall timing tables and add it back in via the ethanol compensation table.
2. The ECT tables are applied on the basis of 100% ethanol content. See the help file below. Basically they're there to add a lot of fuel when the temperature drops below about 50 degrees, and the ethanol stops vaporizing.
3. See http://www.hondata.com/help/kmanager/fl ... htsub=flex. Any of the sensors will work. One of the sensors is smaller (13577429) and the other two are almost identical, and both have mounting bolt holes.