I read that article and it was pretty good but it still didn't address exactly what I was saying. It was talking about conventional production engines built by every day street rodders and comparing the "shit to worth" ratio of the additional stroke. While still informative, I still am curious about the limitations. Like I said, and especially with a lot of sanctioning bodies, what if you have a size limit? For instance, if you are building an engine specifically for a class that has a displacement limit of 5.0L. Now, to me, it just makes sense that you would like the largest bore you could get for the reason Tim mentioned. And while the author mentioned piston speed and dwell, he was talking about relatively modest differences. What if you were to increase those differences noticably? So say with a 5.0L limit, you had a 4.030" bore and a 6" rod, what would the stroke length need to be to achieve 5.0L? Now, what would the dwell time and crank rotation degrees be comparable displacement engine with, say, a 3.75" bore with a 5.7" rod and 'x' stroke?
