The professional products intake made 30 less horsepower on our aluminum headed 408 than the edelbrock. So 470 to 440. Can't speak for the speedmaster but I wouldn't expect edelbrock numbers.
i suspect different combo’s will react differently.
I know the guys who took that 477 horse 318 to the enginemasters competition didnt leave 30 horse on the table by running that crosswinds instead of an eddie airgap, otherwise, they would have ran the eddie on it.Extremely sharp guys. Extremely sharp.
Pretty trick and scienced out mill.
