Whoops, sorry bout that guys, I responded after only reading the first page, only going back and seeing that there was 2 more pages. You can combine all 3, but your engine will hate you, and your wallet. Those e-charges DO help a tad at idle, but anything past that will actually hurt it, as its more restrictive tryin to pull that air through the cage wheel. A turbo does do the same thing, only it spins much faster and does a much better job compressing the air.