Not Ranked
I think he's referring to independent runner systems. I switched from a single Holley to Webers on my 351C, and it definitely smoothed the engine. I had a small solid cam - slightly rough idle. With Webers, it sounded like it didn't have a performance cam at all. The lope was gone.
But it isn't EFI that does that. It's the removal of the common plenum.
BTW, I have a friend with Fast EFI and Weber style throttle bodies (TWM Induction), and another with Electromotive and TWM. They both work well, but they take a lot of work to get them running right.
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