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Old 06-06-2006
spec_ops57's Avatar
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Join Date: Nov 2005
Location: Edmonton, AB
Posts: 353
More air flow equals better milage?

I saw an ad for an air intake today saying how it can improve gas milage. I thought with more air flow, the ecu would compensate by adding more fuel causing milage to go down, but horsepower to go up.

16: Q: How much will this intake improve my gas mileage?

A: A lot of companies will claim their intakes will increase your gas mileage by some inflated number but they really donít know. By increasing the amount of air into your engine, your engine will be able to burn gas more efficiently and in turn crank out more horsepower and torque and therefore decreasing gas usage.
do they give you better or worse milage?
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Old 06-06-2006
KARPE's Avatar
Join Date: Apr 2005
Location: Valrico, Fl 33594
Posts: 4,748
well, you'll get a little bitbetter air to fuel ratio, but basically yeah, more air needs more fuel
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Old 06-06-2006
NicksterSVT's Avatar
Join Date: Apr 2005
Location: NC
Posts: 1,955
if you install a cai, you will lose fuel mileage due to you liking the sound of the intake and flooring it all the time!!! Or at least i did
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Old 06-07-2006
Join Date: May 2004
Location: Fuquay Varina, NC
Posts: 3,048
if the intake ACTUALLY increases air flow, then the engine should compensate by adding more fuel. sometimes, this creates enough power to keep the fuel mileage the same or MAYBE increase it, but id say about 90% of the time an intake will very slightly lower your mileage
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Old 06-07-2006
graniteguy's Avatar
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Location: Texas
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it's a tuff debate. the reason is the control points. How far the throttle body is open and also the computer adjusting the fuel as it looks for the optimum a/f ratio. Different vehicles control in different ways.

If your driving 60 mph and the throttle was open 75% and now with the intake it only needs to be open 70%, what have you lost?

I don't know the real answer to the question. just that it's not an easy question.
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Old 06-27-2006
phatspeed7x's Avatar
Join Date: Jun 2006
Location: Hibbing MN
Posts: 384
I have ran K&N filters, and FIPKs on all my trucks I have ever owned. Everyone I saw at least 1 mpg increase. I just got a K&N filter for my new ranger today so I'm hoping that trend continues.
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Old 06-27-2006
Unregistered User
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breathing easier usually equals better mileage because you have to press the gas down less to do the same amount of work

my fox used to get about 24mpg with h/e/i and ran low 14s

since i turbocharged it i usually get about 28mpg highway and ive gotten 29.9 before... while running mid/low 7s in the 1/8
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