Performance Chips and MPG saving?

[BPage]

Again I quote myself this will work!

Hey thanks for the link on the MCAI... I am reading their forum blog's and these guys rigs are setup just like mine, and they are seeing some 3-5 mpg increases with just adding the CAI.

Does anyone on this forum use the MCAI? If so would love to get your take on it...

Thanks again for pointing me to this website, seems to be a gold mine!
:wings:

 

[wardrow]

I am!

 

[BPage]

I am!

What do you drive (mod/gearing/tire size included) and what type of MPG saving did you see? Did you notice an increase in horsepower?

any info you have would be greatly appreciated...
:coffeedrink:

 

[Scotsmanspride]

so far with hypermiling i have gotten 24 mpg at my best. I could probably hit close to 30 with it but it would have to be the right area and not very much traffic at all.
Here is something i found from a guy on another forum...



hypermiling the jeep
spent the past 2 days hypermiling the jeep wrangler. i have to say it was
really difficult to do. 4 trips @80 miles each... the trip(my commute) consists
90% of hilly highway @ 55mph limit. only 4 traffic lights.

basically hypermiling is a screwed up way to drive. trying to maximize
mpg(and not piss off other drivers too much). luckily my commute sees very
little traffic and its mostly two lanes.

the tecniques i used:

pumped the tires up to their rated 44psi.

on flat roads i spent most of the time in 5th gear @47mph@1600rpm..very
little pressure on the gas pedal.... this is bare minumum rpm for 5th gear on
the jeep to maintain speed and without creating a lot of wind turbulence.

kept the tires out of the ruts and close to the white line(this is called riding
the ridge..less tire friction than riding in the tire marks..helps on non flat roads).

shut off the engine if it looked like i will hit the beginning of a red light...and
just coast to the light. brakes were heavy but worked fine. acceleration from
a stop takes forever...short shifting at 2000rpm..normal jeep shifting is 3000rpm.

did a bunch of pulse and glides...slowly got the car up around 50-52... put it
in neutral...and coast until it hits 35. put it in 4th to get back to 40mph..and
5th to get back to 50....rememeber accelerate slowly...repeat.

on uphills..stayed around 47mph until 3/4 up the hill and then let off the gas
a little and let it slow down enough to get over the hill at 30mph...

if on a small downhill.. coasted in neutral until speed dropped to 35.

if on a big downhill.. shut the motor off.. turned it back on at the bottom
of the hill or whenever the car felt slow..i have 5 opportunities to shut it
down on big hills on each 80 mile leg. sometimes i couldnt due to another
car nearby. free 3/4 mile on each shutdown.

the jeep normally gets 19mpg. 18-20 is my typical range when i commute.

and the results of driving like grandma on weed:
325 overall miles..12.53 gallons. 26MPG!!!
it's a 15 gallon tank.. i had plenty more.

each 80 mile trip took only took about 15minutes more than normal,
with an increase of 7mpg. i can live with that.

 

[wardrow]

My Jeep is a very heavy 06 unlimited Rubicon manual transmission http://www.expeditionportal.com/forum/showthread.php?t=30269
I still run the stock gears and 255/85/r16 toyo mt's. Before the mcai i was averaging 14-15 highway (using gps) now I am averaging 17 highway.

 

[BPage]

Outstanding...
Thanks

My Jeep is a very heavy 06 unlimited Rubicon manual transmission http://www.expeditionportal.com/forum/showthread.php?t=30269
I still run the stock gears and 255/85/r16 toyo mt's. Before the mcai i was averaging 14-15 highway (using gps) now I am averaging 17 highway.

 

[BPage]

Sorry Nomadic_LJ that I didn't hit you back sooner, your post got lost in the responses...
I have been measuring my mpg by tripometer (miles) and gas reciepts (actual fuel used).
example: 200 miles driven / 15 gallons used = 13.3mpg

I have a GPS, will try that method out as well.

Thanks

How are you measuring your fuel mileage?? Cause if you didn't change your speedo gear then its going to be off. I would suggest using a GPS if you still have the stock SG.

I have exact same set up as you have and I average about 17hwy 14city

About the only things you can do:
- Check tire pressure
- Get rid of any extra weight you don't need
- shift at 2k rpm (if manual)
- Stay the speed limit and keep off the skinny pedal
- Make sure your airfilter is as clean as possible
- All C02 sensors are operative

Lets face it, we're basically driving a rig with the areodynamics of a barn with a tent on top. Nobody buys a Jeep with MPG in mind though I will say yours are a cause for concern

To kcOtma - Cold air intake and throttle body spacers don't do a damn thing. The CAI look cool but thats about it.

 

[Jim K in PA]

Good thread. I also have an '05 LJ Rubicon 6-speed. I bought it used (barely - 7500 miles) and it already had a K&N FIPK in it. I am running Maxxis BHs, 255/85-16. I now have about 75k miles on it. With a dirty filter, and the hardtop on it, I got 17.5 mpg on the last tank. I shift at 2500-2750 most of the time, but get on it when needed. I do not hypermile. My commute is ~40 miles each way, combo of highway and side roads with rolling hills.

BTW - with the 255/85s, my speedo is off about 8%. If your speedo error is the same, your 200 miles on 15 gallons goes from 13.3mpg to 14.4mpg. If your LJ has an auto trans, that would account for another 1-2mpg loss.

I don't know if your area is required to have oxygenated fuels in the winter, but in our area we do. Every year I notice a drop of 1-1.5 mpg when the oxy-fuel switch happens, and an increase by the same amount in springtime when it goes away. This is not just with my LJ, but with every car I have owned and paid attention to since the oxy-fuels were introduced.

 

[Nightkrawler]

edge trail jammer

I have the edge full system on my 97 TJ with 33's a 4" tera flex and with the 3:55's ( I know waiting for the axle upgrades) I get around 15 mpg corrected with her loaded for a week trip and the hard top on.
Side note the Edge throttle body has an annoying whistle at 2k rpm when crusing on the freeway. tried to hone the map sensor bypass out and its better but still there.
I'd do it again in a heart beat the cat back, banks header, and the edge make the tires seem like the 31's.