K&N, Airaid, AFE, Volant, or other?

Raptor_Al_41 said:

I'm selling Spyder projector Headlights on here, and when they sell I'm gonna buy an air intake. Which one will provide the biggest MPG and power increase? Also I would like to keep the 6.2 badged Plenum for looks... All advice is wanted. Thanks

The projector headlights are $250 on My profile. They come with a 6000k hid kit. The assembly was $ 261 on eBay and the hid kit was $ 90. This is a steal!! Check out the listing on my profile. Thanks in advance,

Raptor Boy

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Big Blue said:

(K&N, Airaid, AFE, Volant)

They are all quality units, and will probably give you similar results (within 2-3 HP of each other).

It comes down to personal preference. I have an Airaid and love it. Great quality and about a 15 minute install.

I know the Volant required you to relocate the coolant tank. (No thanks).

Regards,

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Deinonychus said:

You can add Roush to your list of CAI's.
They are all similar enough to make it a personal preference, IMO.

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BMWBig6 said:

I thought the Roush had narrower (or same as stock) tubing? And the AFe, Airaid, etc. had larger diameter piping that is smoother (no accordion elbows, etc.)?

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1. A large filter surface area
2. A filter material that has minimal pressure drop
3. The filter end of the tube would have a large diameter (cone-like: large at filter to smaller at throttle body)
4. Intake tube would have minimal bends and smooth surface.
5. The intake tube diameter would have a seamless transition from tube to throttle body

Deinonychus said:

I do believe that the Roush is the same tube diameter as stock, but I don't know the diameters of the others.

The Roush does have two accordian ribs, I suppose for some sound damping along with ease of install.

Looking at it from a flow restriction perspective, I think it would be safe to say the largest pressure drop in the stock system is the filter. If that is indeed the case, a larger diameter intake tube would add no measureable improvement.

That said, I would suspect that the two accordian ribs of the Roush add pressure drops opportunities. I would think a smooth intake tube with conically decreasing diameters to the throttle body would be the least pressure drop.

To use an intake tube diameter at the throttle body greater than the throttle body's diameter would create eddies at the diameter gradient, thus a pressure drop. A seamless diameter between the intake tube and the throttle body would yield the optimal flow environment.

So, from my knowledge the least pressure drop from outside the filter to the throttle body would have the following attributes:

1. A large filter surface area
2. A filter material that has minimal pressure drop
3. The filter end of the tube would have a large diameter (cone-like: large at filter to smaller at throttle body)
4. Intake tube would have minimal bends and smooth surface.
5. The intake tube diameter would have a seamless transition from tube to throttle body

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Ruger said:

You will NOT realize a mpg increase with ANY intake. You own a 6,000 pound vehicle with a large displacement high performance engine. It sucks air and fuel to live, and you wouldn't get any better fuel economy if you didn't filter the intake air at all. You might get a few more horses, but only at large throttle openings when fuel economy goes to hell anyway. So whatever intake you decide on, have realistic expectations.

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