I believe in most scenarios, a downdraft intake port is always better.
Look @ most all motorcycle cylinder heads of the newer style bikes,there all down drafts.
It makes for a great loooong short turn radius.
Not sure why the Wayne head is not good as a down draft?
A port w/a short 90 degree bend is not good, like the stock Chevy 6's.
I know Mike Kirby told me the earlier Duggan/Sissle aluminum 12 port head ,like Tlowe owns,,,,said that particular intake port flows less the a siamesed port head, & those were down draft ports w/a square inlet. 194-292 series engines .
Maybe Tlowe has some flow numbers of those heads?
MBHD
