Ross Farnham has been posting some interesting information on some  guys that are flying very efficient belly scoops for cooling their subie rads.  Here are some links to check out if interested.  Ross is working on a new scoop for his Subie Turbo 6A that he has been flying for number of years...400+ hrs.

 

 

Scroll down to the middle of this next link on the VAF website and look at how thin the Dragonfly's belly scoop is...

 

 

Doug