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-   -   CAI give actual performance or MPG improvements? (http://www.jeepgarage.org/f108/cai-give-actual-performance-or-mpg-improvements-19102.html)

Danco 02-19-2011 08:49 AM

CAI give actual performance or MPG improvements?
 
Anyone who has intalled CAI on the WK2 see actual performance or MPG improvements?

J13ntv 02-19-2011 10:25 AM

Re: CAI give actual performance or MPG improvements?
 
As far as I know, no one has put the Jeep on a DYNO pre and post short ram air intake. However Mhassler (the original proto) told me he has seen roughly a 10% fuel increase (he mentioned he didn't know if it was all because of the intake or partially the intake and the other part the ESC TSB update). He also said he can feel the difference throughout the RPM curve, but could also be partially contributed to ESC TSB update as well.


I'd imagine he will jump in here sooner or later.

mhassler 02-19-2011 03:04 PM

Re: CAI give actual performance or MPG improvements?
 
J13ntv, that's true. The other unknown is the warmer weather. I've posted on the BWoody thread with my "findings". I should also mention that I haven't even gone through one tank of gas since the install.

And, it is not a true CAI, not even BWoody calls it a CAI. Unsure of BWoody's plans to make a true CAI. I offered my Jeep to him though.

I didn't get the dry-charger.

ryorde 02-20-2011 02:16 AM

Re: CAI give actual performance or MPG improvements?
 
I installed one of the beta bwoody intakes and instantly saw an increase in performance as well as a small increase if fuel mileage.

Milous 02-20-2011 02:37 AM

Re: CAI give actual performance or MPG improvements?
 
Quote:

Originally Posted by J13ntv (Post 359538)
...he has seen roughly a 10% fuel increase...

At best, a CAI *might* improve mileage by up to 0.000000 %.

ibleedoil 02-20-2011 05:07 PM

Re: CAI give actual performance or MPG improvements?
 
I Agree with Milous.

Ive installed CAI's on multiple vehilces...most recently my 2005 GMC with a 5.3L V8. It sounds cool. lol. But as far as real performance gains or better fuel mileage its not gonna make that much of a difference. I thought i could feel it when i first installed it but that was probably just in my head. I'm guessing maybe 5-10 hp.....MAX on just about any gas engine from just a CAI. Ive seen lots of dyno results to support this. Most guys with my truck get a intake/exhaust/tune and gain about 25-35 hp.So going from 360hp to 370hp at the high end of the estimate, its only a gain of 2.7%...by the time it gets to the pavement/dirt...that gain is barely anything at all.

I know my truck is no jeep but a CAI on any V8 wont really do a whole lot. That being said. Ill probably get one for my jeep once the big manufacturers start building them

ryorde 02-21-2011 07:41 PM

Re: CAI give actual performance or MPG improvements?
 
Normally, I would agree 100%, and that my past experiences have reflected that belief. I wasn’t excepting any fuel improvements, but I got them anyway. My weather has not changed, nor has my driving style, but in a single tank of gas I gained about 0.8 mpg. Normally I would have written this off, but my mpg has been very consistent. Mike at bwoody said that on the WK2 in particular, the stock air box cannot provide enough air to the engine at high rpm (where 70-80mph usually puts the engine, and I like to drive) to properly lean out the mixture and the engine just wastes fuel. With more air comes a proper mixture, and with a proper mixture comes more power and less waste. It wasn’t much but I noticed.

wjs81866 02-25-2011 04:54 PM

Re: CAI give actual performance or MPG improvements?
 
I haven't seen any fuel MPG improvements, I think the upper power band is smoother from say 45 to WOT. I pull a larger boat and when I get around hills etc more air seems to help, at least in previous grands I have had.

mrpositraction 02-27-2011 07:17 PM

Re: CAI give actual performance or MPG improvements?
 
Not sure if it is the intake, weather, mileage, or geograpical location but I average 20-21mpg from Columbia, MO to Whitewater, WI yesterday. Over 95% of the time I was at 75mph with the cruise on. My best seen before was 19mpg but that was at 80 mph.

Marlin 02-27-2011 07:56 PM

Re: CAI give actual performance or MPG improvements?
 
Quote:

Originally Posted by Milous (Post 360079)
At best, a CAI *might* improve mileage by up to 0.000000 %.

Exactly.

Lets be realistic here guys, if there any REAL improvements to be made (and 10% is simply outrageous!), the manufacturer would improve their stock design intake.

There is no reason for the stock design intake to be a restriction in this day and age.

:thumbsup:

kfc01 02-27-2011 08:36 PM

Re: CAI give actual performance or MPG improvements?
 
Quote:

Originally Posted by Marlin (Post 365854)
Exactly.

Lets be realistic here guys, if there any REAL improvements to be made (and 10% is simply outrageous!), the manufacturer would improve their stock design intake.

There is no reason for the stock design intake to be a restriction in this day and age.

:thumbsup:

Hi there, this is my first post, Im from Aus too and looking at a CAI for my v6 2001 JGC, from my previous experience here, you can expect significant gains by doing such a small thing, why? because of the emmision standards that the cars have to meet for mass production at least over here, by default they are very restrictive and opening up stock V8's here have seen significant improvements. I am keen on doing this to my v6 and seeing how much improvement. I am not sure if the standards are as strict in the US so perhaps gains are not as noticeable?

Marlin 02-27-2011 08:49 PM

Re: CAI give actual performance or MPG improvements?
 
Hi mate :)
I assume you mean 2011, not 2001?

It's my opinion (and we know about those! :)), that unless any CAI or free exhaust system is coupled with some form of tune, (preferably a tune altered on a dyno for your particual vehicle), that the ECU simply re-learns very quickly and takes away any perceived benefit that you may get initially, effectively aquiring all the factory specs soon after.

We all know that yes, there are improvements to be made, BUT, the factory tune is there to allow for "85th percentile", ie, the majority of purchasers who may abuse, may run poor fuel, etc etc, rather than enthusiests who take more of an interest. Hence my thinking that a tuner is warranted to retain any improvements.

In essence, re intakes, it's my belief that the factory airflow airbox/intake headroom properties are more than enough to absorb any increase with a tuner.

Heck, many, many sports cars have what appear to be a fairly ordinary factory intake designs, yet substantial increases can be had with tunes and free flow exhausts before the intake really needs upgrading. It's more tinsel than anything, and yes, I have one on my Jeep :) lol


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