G4 flex tune

[SKYMAGGOT]

G4 flex tune

To do a flex tune on a link G4 which is currently tuned on 98 would you have to do numerous tunes starting with a low amount of 98 then add 5 or 10 litres of e85 at time? 

[Guilt-Toy]

few ways to do it,  tune it properly on 98,  then drain the tank totally and tune it on e85,  once this is done then you can start adding 98 and tuning different blends,  this way you will always have a correct tune no matter what the content is

[azzada1]

My tuner tunes the car completely on 98 then adds 20% ethanol and retunes, then another 20% and retunes etc etc until he gets to 80-85%.. If the car spends most of the time on ethanol he does the same process backwards from E85 down to 0% ethanol.. Seems to work quite well.

However in no way would I disagree with guilt toy either.. 

[WMDC35]

As above, 4D fuel table, ethanol on one axis & usually rpm on the other, same plan for ignition & cold start tables.