It sounds like your not familiar with your Canadian brother (Ross Farnham) and his SDS company?  Many years ago now, he built and flew his “Racetech RV-6A) w/Subie turbo and IVO prop, and in the process did quite a bit of testing which he posted on his web site.  See: http://www.sdsefi.com/rv13.htm

His web site is chock full of very interesting information and pictures, so if you get a chance you should check it out.  His P-51ish under cowl radiator cooler on his RV-10 is also very interesting, as is some of the very low profile radiator scoops he has documented over the years.

Doug

RV-9A 13B/FWF