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  #13  
Old 06-25-2012, 08:49 AM
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Re: Do Cold Air Intakes Improve Fuel Economy?

I bought my Volant and bolted it on a couple days after taking delivery, so I have no idea if it improves MPG over stock. Most likely it doesn't unless you can combine it with a free-flowing exhaust and engine tune. I average 17/21 now, so I'm happy w/ the MPG. I do know it opened up some space in the engine bay and the Donaldson filter w/ a 100,000 service interval is very nice. Don't buy one expecting any drastic MPG increases.
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Old 06-25-2012, 09:02 AM
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If you think about it, these car companies spend tons on R&R to find out how to perfectly match air to fuel ratio on these stock intakes. When switching to aftermarket CAI's you sometimes restrict airflow due to those companies making smaller piping and adding a filter that's open (not in a box) to engine heat a lot more then the stock.

So unless you are spending thousands on an engine setup thats included with a supercharger or turbo, its just for aesthetic purposes and for some the sound as well.

Try Swiss cheesing your stock intake box to get the same sound if that's what some people want.
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Old 06-25-2012, 07:33 PM
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Re: Do Cold Air Intakes Improve Fuel Economy?

I added a cheapo Ebay CAI to my 99 Cherokee with the 4.7 V-8. Yup, it sounded better when I punched it and I thought it improved my performance and mileage. That was until I was planning to trade it in on our new Grand Cherokee and put the stock airbox back on. When I did I was shocked to to see the mileage jump up roughly 1 MPG. I could hear the "whistle" sound again through the airbox that the 4.7 makes when everything is just right and achieving optimum economy. I have left the stock airbox on ever since. However, in all fairness, I believe there is a K&N replacement filter in the stock airbox. That may be helping?

Doesn't someone make a high flow after market filter for our WK2s that breathes well and does NOT let dirt through?
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