i don't know much about rotary engines, i know back in 1975/6 amc was going to use them in (get this) a pacer. but there was problems with then engine. now with computers to make them run, rotarys have started to made a come back. only time will tell what they can do. i saw one run a 5.23 in the 1/8 the other night. but 4 out of 5 times they where pushed off the track after they did there burnout or from the tree. i believe 3 of them only got 1 run in. there was 4 or 5 of them there and they all had the same problem.