Quote:
Originally Posted by buditjoenawan
Paul, does the ignition advance multiplier go beyond 1.0? If I was tuned for 91 octane, then moved to an area with 93 octane, will the ECU adapt to the higher octane?
budi
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1.0 is the best case scenario. The stock ECU setup starts at 0.7, and ramps up from there (on good gas) or down from there (on bad gas). On a bad tank of gas or extreme conditions, it's normal to see it down in the .6 range. Toyota and/or Subaru knew the engine was going to see bad gas, which is always going to be an issue at 12.5:1 compression, so the ECU is designed to deal with it as best possible.
It may seem like we are being overly finicky about keeping it at 1.0, but we just want to make sure we deliver as safe a tune and setup as possible.