Tom, do you think perhaps a 650 vacuum secondary would give better results??? They are in a sense "self regulating" in that the primary airflow creates the signal to open the secondaries....even though rated at 650 the end result could be 550-600 deoending upon the engines needs......based on efi's input: didn't G.M. put a q-jet on the pontiac ohc 6?.....time and expense are factors I know but it might be worth a try if you have access to either one......checked out the video; great stuff you're doing.....for years I've been running on seat of the pants feel and gut level intuition, good to see some hard data.....fats
