loss of mileage with cold air intake? - Ford Powerstroke Diesel Forum
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post #1 of 10 Old 09-07-2011, 12:15 PM Thread Starter
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loss of mileage with cold air intake?

I've done some reading and it seems that almost everyone that have change intakes has lost mileage. I wanted to get the airaid but I saw a guy say he lost 2 mpg with it. Is this really happening to all brands if so doesn't it seem the aftermarket kit is hurting your truck. More air should mean better combustion resulting in more power and less fuel burned?

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post #2 of 10 Old 09-07-2011, 12:58 PM
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can someone explain this? it has happened to every truck ive owned gas or diesel. thats why my '11 is stock.
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post #3 of 10 Old 09-07-2011, 04:11 PM
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i dont beleive that. especially with tuning.
but the placement of the MAP does make a difference .

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post #4 of 10 Old 09-07-2011, 06:44 PM
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Quote:
Originally Posted by stroke11 View Post
I've done some reading and it seems that almost everyone that have change intakes has lost mileage. I wanted to get the airaid but I saw a guy say he lost 2 mpg with it. Is this really happening to all brands if so doesn't it seem the aftermarket kit is hurting your truck. More air should mean better combustion resulting in more power and less fuel burned?
1st Cold Air Intakes do not bring in more air. More meaning Volume. There are supposedly supposed to bring in "colder air", colder air means better performance which is the reason most high performance cars have intercoolers.

2nd it all depends on the cold air kit. Most performance car cold air kits are a joke. Many of them have chrome pipes (which attracts more heat the the factory plastic) and are open to the engine carpatment where all the engine heat is. Factory air cleaners and pipes are usually aimed or pick up air from behind the head lights or under the fender (where the coldest air is).

3rd What is wrong with the factory set up? All these companies never say anything but cold air kit adds HP and MPGs. They never say why. These new vehicles are so finely tuned and such tight tolerances that taking something off like a air cleaner normally does harm to performance.

If you want to pick up MPGs I would say custom tuning is your best bet.
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post #5 of 10 Old 09-08-2011, 06:45 AM
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Quote:
Originally Posted by 91Terminator View Post
1st Cold Air Intakes do not bring in more air. More meaning Volume. There are supposedly supposed to bring in "colder air", colder air means better performance which is the reason most high performance cars have intercoolers.

2nd it all depends on the cold air kit. Most performance car cold air kits are a joke. Many of them have chrome pipes (which attracts more heat the the factory plastic) and are open to the engine carpatment where all the engine heat is. Factory air cleaners and pipes are usually aimed or pick up air from behind the head lights or under the fender (where the coldest air is).

3rd What is wrong with the factory set up? All these companies never say anything but cold air kit adds HP and MPGs. They never say why. These new vehicles are so finely tuned and such tight tolerances that taking something off like a air cleaner normally does harm to performance.

If you want to pick up MPGs I would say custom tuning is your best bet.
Have to agree with 91terminator on this..
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post #6 of 10 Old 09-08-2011, 06:58 AM
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thank you! makes sense.
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post #7 of 10 Old 09-08-2011, 07:57 PM
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Originally Posted by pborgia View Post
thank you! makes sense.
No Problem. I left my 2003 Cobra air intake all stock.
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post #8 of 10 Old 09-08-2011, 08:46 PM
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So is it alright to leave the stock intake when running a tune?
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post #9 of 10 Old 09-08-2011, 08:55 PM
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Quote:
Originally Posted by cthaeffner View Post
So is it alright to leave the stock intake when running a tune?
I dont think it would hurt. Not all cold air kits are bad, there are good designs out there. Will you be able to tell the difference I dont know, but with you tune you will.
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post #10 of 10 Old 09-17-2011, 09:00 AM
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I would keep reading up on the tuners available, I have had several CAI's on past vehicles. I always seemed to pick up some performance (sometimes hardly noticeable other times WOW! However, I never saw the gains in MPG. as some of the companies claimed. Hope this helps. Let us know what ya decide to do. There is a wealth of knowledge on here.

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