Not that I'm aware of. I think there's quite a bit of room for improvement in cooling drag reduction in the RV-14, but unfortunately the only option right now is to spend a lot of time making changes, testing, and likely making more changes to optimize the performance...
Spring Hill, KS
RV-8A N2D #80583 - built/flew/sold
RV-14A #140017 - wings complete, empacone in progress...