you\'ve been told!
back to the topic though; generaly, the more aggressive the porting the larger the power increase at the top end and the more "undrivable" at the bottom end. The glory of the Mazda rotary though is that as Mark pointed out, you can "tune" the primarys independantly from the secondaries, which might offer a good compromise. Some tuners focus more on the exhaust ports and make them really bloody big, this can bring faster turbo spooling and better top end. The other thing to consider is who to choose to do the work... the craftsmen avaliable in this country have different styles and their signiture techniques are based on different backgrounds and experiences. Saying this, there\'s nothing worse than a really well ported engine with a crap map. Mark, I do believe you have been told twice, if you make it a third time, you\'ll have to stand in the corner and face the wall!!:D :p Hope my incy wincy bit of knowledge is food for thought Si.