I do not know in this specific case, I tune 100's of rotaries in my time and while there are gains to be had its probably more true than not the reason why the injection/ign map is set is for reliable operation. The stock ECU is very smart, adjusts to different fuel types and alters the power (ign timing to match) probably tweaks the fuel too, but the times I have check it the fuel curve seems the same regardless of octane, though it does vary with what gear you are in. Moral is someone needs to do 100+ Klugers and have a bank of reliable running cars (for hundreds of thousands of kilometers) before I myself would let mine be retuned or chipped etc < you need to verify long term effects. Chasing a fwhp or dyno glory has its short comings, not sure I would bother with my daily driver :) I am happy with the speed and all round package of my car out on the highway not much can match it :D :o Has anyone considered fitting the supercharger from the TRD Aurion to the engine - if so what probs would this cause