I didn't say you were wrong and that it did not increase RWTQ. They don't create more torque they multiply existing torque by your own examples. Just clarifying a point.

Eventually you do run out of RPM. Lower gears are only effective if they are useable for the motor.

What gear ratio was not directed at you but th OP. If the OP is already running 3.92 ratio for example they will not see any highway gains with 4.10 and will most likely lose mpg and usability. If they are running 3.55 then maybe they help some. If it's a 3.27 rear gear then we can actually help them. Instead of arguing with me we should probably ask questions so we can help the OP instead if throwing out ideas that may or may not work.

 

I did not mean to start a quarrel on here about gear ratio. I have an '86 chevy 1 ton w/4:56 gears on a 4 speed ford tranny & let me tell you, it has torque. I got it on 37's, lockers in rear w/only a 350 & headers. Its top end is not much & mpg sucks, but it will pull whatever you put behind it, it is a beast. So, I am very well aware of gear ratios & the higher it goes, the more torque is produced, however, I am not changing gears in this dodge - I am just looking for the easiest ways to get better mpg & I say more low end torque, maybe I mean just a little more power at a lower rpm - I understand how the gears produce low end torque, but I do drive 120 miles every day to work, so not changing the gears.

My exhaust is nice, my cousin did a fine job, will be able to tell in the next few days if there is a difference in performance. Now, I am either going to get a chip or a cold air intake installed. Again, I am no mechanic & dont have any experience in increasing performance in vehicles as far as asphault driving, that is why I posted originally. My brother installed a chip on his '07 diesel that has a few settings & you can really tell the difference in power & he gets better mpg from it. His chip is diesel specific though, so I am having to find one for regular fuel, & I have NO experience with it. I do know that intakes help as well, but am asking which of those 2 would be the better choice, OR, if there is something else "minor" that would be more beneficial. Really not looking to do "major" - thousands of dollars of work to it adding all kinds of kits. I understand that is the way to go if I was trying to get my ***** bigger & impress folks, but I am only looking for a lil more power & better fuel economy, at the lowest cost & ease of installment.

Thank you all for the help!

 

K&N makes a CAI for your truck and ebay. Bullydog's tuner will work for 2011 4.7, this would give you a bunch of options for a tune. The 78mm ported throttle body that several places sell would probably be the best initial bang for the buck mod.

 

I'm not really familiar with the 4.7 hand held tuner market, but I agree with looking that direction, usually Super Chips, Bullydog, etc... would be decent for quick tune modifications.

Chips in terms of dealing with diesel vs. octane grade fuel are completely two completely different animals. Your likely dealing with an aspirated motor from the factory already.

A larger ported throttle body may have an advantage to a crisper throttle response, however any additional air flow "will be" compensated through the PCM, making the additional flow somewhat obsolete. Additionally the intake manifold has a maximum stock CFM, which can not be altered when the intake manifold is not ported matched, which creates a bottle-necking scenario.

Again, I'm "not sure" if the stock airbox is efficient as the 5.7, but many have left the stock airbox alone with the 5.7. It's actually had proven better performance over most aftermarket CAI. I myself have the K&N CAI, I prefer a little more sound, since I have not altered my stock dual exhaust. I'm very aware a CAI isn't going to produce any noticable gains, especially with almost 6k lbs. practically behind it, but I enjoy the sound without drowning out a conversation within the cab.