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LOW AND HIGH GASOLINE OCTANE - FUEL AND IGNITION TABLES

Road Tuning

Discussion and questions related to the course Road Tuning


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Hi everybody, I would want to know experiences and diferences for the Low and High Fuel tables. Some ECUs give you the option for select maps according your requestings. I have done the fuel map and the ignition map for low octane gasoline, and would like to do the maps for the High octane gasoline. Do you have some suggestions, experinces, advices? any comments?

Thanks for sharing your knowledge ..!

Can you let us know what ECU you're tuning? There's a lot of differences in the way the high and low octane timing is dealt with depending on the ECU manufacturer. With factory ECUs this is a safety parameter and the ECU will bias between the two tables depending on how much activity there is from the knock sensor.

Hi, I'm tuning a Megasquirt 2 Extra, I have setting the ignition tables with the lilknockmeter, but it is not conected to the ECU, and it runs ok for the low octane gasoline.