Lets see i have a k&N cold air intake and also 2 flomaster 44s with shorty headers and im not getting any better MPG what can i do to change this. right now im getting a superchip to see if this will help me but what are some small things i can do to help me out

 

Drive like an 85 year old granny.

 

Did you put duals on it? Those will suck out your bottom end and all of your mpg right with it.

 

yes i did. but how does it do that. i thought duals helped you out?

 

if you put your exhaust back to stock you wont floor it all the time just to hear it

 

to be honest with you, i just put an intake on and am not noticing anything. to me modding trucks wont do anything but eat away mpg. i never understood how adding things will change the mpg unless its re-gearing. the whole pt of hp is to burn fuel quicker. just my 2 cents

 

You lost backpressure and low end torque by opening up the exhaust, thus it takes more fuel/air to overcome the loss. The stock manifolds/y-pipe with a good cat-back like Magnaflow will make the best set-up.

 

Get rid of the FM44's if you want to increase mileage and performance. I have a cat-back FM50 DOR and my mileage didn't go up or really down. FM's are extremely restrictive to the point of where they are worse than stock. I will admit that they sound great but don' t flow worth crap. Look into magnaflows or AeroTurbine 3030's. IMO they still sound great, but flow alot better.

 

thanks. but i dont have the money to change it back and i guess its not really worth it. just thought i would see if like changing the spark plug wires to these http://www.car-stuff.com/jbasparkplugwires.htm
or maybe just a all around tune up

 

How can more air flow be worse on mpgs? As was explained to me, it's like blowing through a small straw designed for sipping coffee, and then through the hose to a vacuum. However, if you have lots of twists that will be harder for it to flow than a direct system.