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...Maybe I'm wrong and the is-f is just this untunable magical engine...
This is actually pretty close to the truth since the variable valve timing technology is unique to this engine, so you'd need to figure out an algorithm to run it, or fix the cam timing and lose all the advantages of variability. Add to this 8 direct injectors with 8 port injectors, and you're looking at a pretty serious investment in software just to get the OEM setup replicated. With the very small number of potential buyers, it's just not worth it.
Originally Posted by rtr01
...Lexus contacted 5-axis to do the modifications. That is a fact. They told them to do motor work. That is a fact. That car now has a 5.8L. That is a fact. They would have either had to find a way to tune it, or Lexus gave them an open ECU in order to make it work. That is a fact.
And you know these are facts because you work at 5Axis? Lexus didn't give them an "open" ECM, they just figured out (with some help) how to make it work acceptably for the show circuit. Why do you think we never see this car running fast laps at Fontana? It can't do it reliably.
