DaveH wrote:
Thanks for the suggestions, but I believe I have found the answer for BMB at least in these two links.
http://aafo.com/hangartalk/showthread.php?t=5320and
http://www.taichiunlimiteddrawings.com/The profile drawing shows what appears to be an air intake in the top of the cowling, and looking more closely at the few photos I have the cowling is not completely round. In the other thread there is a photo of a BMB poster which shows the inlet. There are also air inlets on the leading edges of the wings, but I can only assume that these are for oil coolers within the wing sections.
Blind Man's Bluff, when built in '86-87 utilized a modified cowling off of an A-26 Invader (similar to what the Planes of Fame "Super Corsair" built in 1982 used). They also had 'enlarged' and modified wing-root scoops for the oil cooling. In 1997, that cowling literally 'failed', and started to banana-peel off during the final race. When they rebuilt it with the new cowling, I believe they took the carburator air in through a wing-root intake.
The two R-4360 Sea Furies have the scoops on top of the engine, as well as Stu Dawson's "Spirit of Texas" with the R-3350. It just offers a more 'direct' route to the engine, with one 90 degree turn instead of snaking it's way up around corners and such.