had a civic type-r base map with advanced timing and 110 octane. Rev limit set tp 9800 but shifted between 9300-9600.my a/f was nice until about 7000 rpms after that, i personally could not do much more with my s300. I dont know much about tuning. Parted it out before i got a real tune. Out of two dyno pulls it put down around 232whp and it ran a 13.26 @106 on falken ziex tires.