When you make more power with more air you need more fuel also, correct
I've dyno tested one tunnel ram on my old 526 C.I. mule motor, it gained 35 HP on a DTS engine dyno going from a single 1050 CFM Dominator to two of them including using the one off of the single four barrel intake, it was a Indy tunnel ram with a dominator top, the single carb intake was a Indy 440early -3 dominator intake