Just to back up what Brian said. When tuning the Supercharger with the Greddy the guys had a lot of problems with the standard ECU as it uses variable fuel and timing maps which meant it was hard to tune. When we went to the Mugen it was better as this uses fixed timing and fueling maps which are optimised to run leaner. This meant that there was a fixed point to work up from and the tune then was able to focus upon adding fuel and pushing back timing in the right places.
Additionally cooling becomes critical with forced indiction and the guys at Tuning Japanese used laser thermogauges on induction and all key air entry points to look for high variations. With all the cooling mods plus extra insulation on the heat exchanger the variation was down to less than 3 degrees centrigrade on power runs.
There are a number of key rpm points where timing and fueling maps change - these are around 4500, 6000 (VTEC), 7500 and 8500. Don't ask me why but these were the areas where most of the work focused on at the end of the tuning with various power on/off loads.
This is an excellent engine and it needs to be looked after. The guys at TODA have taken this apart compeletely and they were impressed - and they build race engines!
Enjoy it and look after it!
MACA