...so is it true cooler air = MORE fuel consumed?

 

yup, it also means more power produced for a given range, however the increase in consumption is usually not enough to notice, and the increase in power means you can run slightly lower rpms in a given condition hence reducing fuel consumption, in the end it balances out and has a very very minimal effect on fuel economy (assuming your driving style stays the same)

 

Thanks Shrp. As I'm now working about 10 mi farther its another 20 mi per day so I'm trying everything I can within my very very very limited budget to maximize my fuel economy. I just re-rigged my intake using a metal 4" dryer vent pipe, semi-routed through the front grille. There are some lines in the way and I had limited time so I couldn't get it routed all the way. It was kinda funny when two home depot employees were watching me rig this in their parking lot! I asked because AFTER I did this I re-read hydra's thread and others on this and almost kicked myself for (maybe) increasing my fuel consumption. And besides not having a lead foot, doing a tune-up, wider exhaust, what else can I do to maybe increase my mpg's?

 

Do a dual electric fan conversion, http://www.spalusa.com/store/Main.as...tem=FAN-PWM-V3 , the problem is maybe your budget. It will cost about $350-$400. The gain would take awhile to payback the cost, whether it's worth it is up to you. Most people gain 1-2.5 mpg depending on how heavy that right foot gets. (I know mine right foot is 10x heavier than my left).

 

i actually gained a little mpg's when i put on a Cai on my durango. i also try to keep my rpms pretty low when driving it to start out. i try to keep it at about 2000? i think thats what it was... been a while since she's been drove

 

Installing a dual O pipe will kick the HP and TQ out of that motor! Only $99.95! I gained like 15 mpg and like 100 ft lbs of torque installing one......LOL

 

I used to try to keep my tach at 2k, but now with my Jeep TCM I can do 65 at 1500 and 85 at 2000.

 

yeah... only with the 4.7 though... doesn't work for those of us with the bigger engines lol

 

Hydra, what is the dual o-pipe for? And is there a guide on this forum?
MoparMan, the Jeep TCM - is that a Transmission Control Module? What does that cost and how difficult to install/replace?

 

Yes it was about 125 and all you need to do to take off your old TCM is to remove the filter box and remove the TCM and replace with the Jeep TCM. Take out 3 screws on the TCM and unplug it, plug in the new TCM and re screw it in. and re install everything. This only works on the 2001 4.7 with the 45RFE transmission.