MPG gains from air filter change???
JK Junkie
Joined: Jul 2008
Posts: 3,017
Likes: 0
From: Lakewood, OH
Wrap a towel around your head and see if it's harder to breath. Same thing with a dirty air filter, it makes the engine work harder and after all an engine is just an air pump.
A performance filter makes it easier for your engine to breath. It increases pressure through the intake. It leaves the intake stroke to do less work pulling in a volume of air at WOT.
Performance and efficiency gains, modest but measurable.
JK Newbie
Joined: Dec 2011
Posts: 53
Likes: 0
From: York, Pa
Exactly!
Wrap a towel around your head and see if it's harder to breath. Same thing with a dirty air filter, it makes the engine work harder and after all an engine is just an air pump.
A performance filter makes it easier for your engine to breath. It increases pressure through the intake. It leaves the intake stroke to do less work pulling in a volume of air at WOT.
Performance and efficiency gains, modest but measurable.
Wrap a towel around your head and see if it's harder to breath. Same thing with a dirty air filter, it makes the engine work harder and after all an engine is just an air pump.
A performance filter makes it easier for your engine to breath. It increases pressure through the intake. It leaves the intake stroke to do less work pulling in a volume of air at WOT.
Performance and efficiency gains, modest but measurable.
JK Newbie
Joined: Sep 2011
Posts: 86
Likes: 0
From: aloha,oregon
Not worth it....there is so much bs about air filters its crazy. Just google search. There are tons of actual tests and dynos that have been done regarding air filters in general. Ill say there is a huge misconception about it but let you actually decide.
If someone says I gained 2mpg, cool, prove it.
It says it on the dash....lol....
If someone says I gained 2mpg, cool, prove it.
It says it on the dash....lol....
JK Super Freak
Joined: Oct 2011
Posts: 1,075
Likes: 1
From: elko, nv
Originally Posted by rkstar
Not worth it....there is so much bs about air filters its crazy. Just google search. There are tons of actual tests and dynos that have been done regarding air filters in general. Ill say there is a huge misconception about it but let you actually decide.
If someone says I gained 2mpg, cool, prove it.
It says it on the dash....lol....
If someone says I gained 2mpg, cool, prove it.
It says it on the dash....lol....
JK Junkie
Joined: Jul 2008
Posts: 3,017
Likes: 0
From: Lakewood, OH
Not worth it....there is so much bs about air filters its crazy. Just google search. There are tons of actual tests and dynos that have been done regarding air filters in general. Ill say there is a huge misconception about it but let you actually decide.
If someone says I gained 2mpg, cool, prove it.
It says it on the dash....lol....
If someone says I gained 2mpg, cool, prove it.
It says it on the dash....lol....
When you run in closed loop there isn't going to be much if any difference in mpg. Performance gains are going to be minimal as well.
In open loop it's a different story and you can post a difference in both performance and mpg. Not much, less than 5% certainly, but let me set the parameters of the test and I'll get the results you want to see.
In open loop, and on our JKs, what would be defined as heavy acceleration with a throttle percentage above 75%, as a safety mechanism data from the O2 sensors aren't read and the fuel mixture fattens up. In this case, with a table based fuel trim and a rich fuel mixture, more air means more power and greater efficiency. Doesn't make any difference at all with cruise speeds and closed loop with the O2 sensors being fully in play.
