I went to the annual RV fly-in at Weatherford, OK today and saw an
interesting RV-6 with some cool aero modifications. The owner said he has it
going 209 mph now on only 150 hp. He has a Paul Lipse prop but also installed a
plenum with the intake area cut down 2/3rds from the stock cowling inlets and
also added an exhaust area fairing as seen at the attached link. He
said that just be adding this exhaust fairing alone added 9 mph to his top
end...
Doug Lomheim
RV-9A / 13B