Cold Air Intakes Mythbusted

You still have this data? Controlled testing show no gain from intake.

Fuel is controlled by MAF/O2 sensor feedback, changing the intake doesn't effect this. Any Ram effect is nullified by a throttle plate that is almost closed cruising down the road. But the EFI controls will adjust the throttle plate to adjust for a slight intake pressure if indeed there is any.

http://www.fueleconomy.gov/feg/pdfs/Air_Filter_Effects_02_26_2009.pdf

The engine control systems were able to maintain the desired AFR regardless of intake restrictions, and therefore fuel consumption was not increased.

Closed-loop control in modern fuel injected vehicle applications is sophisticated enough to keep a clogged air filter from affecting the vehicle fuel economy.

Ultimate this is saying a restricted intake doesn't effect MPG and a unrestricted intake doesn't either.

 

My data was writing down the ultra gauge average mpg number every week. Before the snorkel I averaged 19mpg and then after a few weeks with the snorkel I averaged 20.5 mpg. I was surprised. There was a slight drop in intake temp as well but I don't recall those numbers off the top of my head. I still had this gain 2 months or so after the install, so it's not like it was only for a few days. I don't know why and I haven't dug into my old thermo textbooks to try and figure out why.

 

Im looking to buy a CAI simply for the increased air filtration a large cone filter offers, plus it kind of un-corks the motor once you start doing exhaust modifications. You can't just buy a CAI expecting noticeable amounts of hp and torque gain. It is only one piece to the puzzle. (**begin sarcasm**) But everybody knows the louder your motor the more hp you have... duhhhh just straight pipe and get a CAI... at least +30hp to the wheels***