..a heated plenum vaporizes the pump squirt and without it you may be making a temporary lean condition even leaner.
..many will disagree but i'm not convinced the airgap style intake is the best intake for a street application.
This makes no sence. The air gap intake does not heat the intake charge,in fact it does the opposite and cools the intake charge for more power. The stock intake has a heated plenum to warm the intake charge and increase fuel economy.