Will adding a CAI actually deliver any significant MPG or power improvements on turbo diesel motors like the ED, or is it just marketing hype and increased intake noise?
I know on naturally aspirated gas motors they are essentially just hype if you don't make similar exhaust improvements downstream. My research has suggested that manufacturers already have motors running pretty efficiently and addition of a CAI, especially one that doesn't truly introduce cooler air than engine compartment air, has little to no return on investment. In fact many guys see reduced MPG, because the increased intake noise encourages them to have a lead foot. Thoughts?
I know on naturally aspirated gas motors they are essentially just hype if you don't make similar exhaust improvements downstream. My research has suggested that manufacturers already have motors running pretty efficiently and addition of a CAI, especially one that doesn't truly introduce cooler air than engine compartment air, has little to no return on investment. In fact many guys see reduced MPG, because the increased intake noise encourages them to have a lead foot. Thoughts?