Hang on a second Col, that's not my understanding, at least on champ nights.
13.5 brushless (or whatever the 540 version is) would perform better than the basic sealed can things currently used. I think Mike Riley used one last time out and it flew along (when Ben drove it anyway
)
Surley the object of the 540 class is that people can compete on equal terms on a budget. If people start splashing out on brushless systems and fancy lipos it will put other people off racing.