i remember seeing somthig about this a wile ago, but cant seem to find it again. i just blew an apex on a half bridge six port (stree car) and am looking to do a MUCH less agressive port, but still want some good n/a power. this is a s4 by the way. so i was wonder if anyone here has done a big 'street port' but also cut into the corner/side seal track like an rx8. as seen on rotaryengineillustrated.com here

 

i did that on an engine, but it's not together yet. should make an easy 400 on pump and 500+ on race gas.

 

actually, i really wanna try this with beveled rotors. not-quite, but almost as much as bp timing, but with a lot more flow.