Instead of Joining RX8club, join
Rotary Car Club - Forums - Mazda Rotary Community 
Originally Posted by
sharingan 19
and if you must have more power, swap in a 20b....google "speedsource"
I'm sure its a joke, but I'll take it serious and comment...
SpeedSource 3 rotor swap will not work and would cost you more than the car itself. Their 8 set up is pretty much tube chassis with carbon shell that looks like RX8. It shares almost nothing that your 8 will have.. I know this as I've interviewed the guys that built it.
There have been decently powered 8s in USA. Most are turbo'd renesis (which still not quite refined) and cost of doing one, I would rather buy an used FD and build a more HP car.
Jeff from Mazdamaniac is probably the best one and best solution to "Tuning" your ECU. Get his Cobb access port and you'll gave some power and monitor what's going on with your car. I was going to do this, but I mainly use my car as daily and when I track, I rather refine my driving skill than try to set a track record
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1993 Black RX-7 Base current project (Sold!)
1994 Mint SSM RX-7.. my future Mazdaspeed 7
1993 MB RX-7 Touring "FEED"
2004 Lightning Yellow GT MS RX-8 (Gone!)
1973 Orange RX-2 Coupe (Sold!)
1973 Silver RX-3 Coupe (Sold!)
1991 Eunos Cosmo 20B Type-S blk/blk