A tune may be a good option rather then just adding boost through other methods and not adjusting the tune to suit.
Now before you ask "
who tunes them"...
![](http://www.rx8club.com/attachments/series-i-major-horsepower-upgrades-93/189982d1351098859-swapping-complete-rx7-setup-rx8-search-gif-gif)
...just search any of the following: workshops / Tune / Verso / ECUTECK.
Need more info: go through the
Performance Thread and see what mods/tune/tuner/boost correspond to power.