Join Date: Mar 2006
Location: Provo, UT
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Re: Will a CAI better or worsten gas mileage ????
IF the CAI actually delivers cooler air the engine will burn fuel more efficiently and, therefore, increase mileage. The problem is that CAIs don't always deliver as promised. One guy building a hot rod Neon was keeping a dyno log after each modification. His AEM CAI lost 5 hp. He replaced the stock box and picked the hp back up. With the Ram SRT-10s, after comparing different CAIs on the dyno and at the drag strip on lots of different trucks, it seems that the CAIs tend to work better in cooler months. Conversely, a drop in K&N in the stock airbox makes more power and produces better results at the track in warmer months.
The bottom line is that you should do your homework on the different types of CAIs and make sure they are really worth it. And, don't go by the butt dyno. It's not accurate. Many times people figure that because it sounds better at WOT they must be making more power but that's not always the case.
'06 Grand Cherokee SRT-8
'05 Ram SRT-10 - turbocharged
'70 Duster project car