just out of curiousity - is the car heavier with a ca18det or a 13bt? and secondly, is it possible to backspace the rotary further than the ca18det (or vice versa)?

I can never seem to get a straight answer as to the weight of a rotary engine. I'm also curious, due to the way the capacity increases - I suspect that the larger capacity rotary engines aren't that much heavier than the smaller ones, but could be wrong of course.