Originally Posted by LTSmith
What gear ratio do u have? Check for leaks in ur up-pipes. The 6637 will definitely help your truck breathe a whole lot better! Also what tunes do you have on your chip and what do you use the most? I hear with 37s you're suppose to get better highway mileage but lower in town mileage. Right now I'm pretty tired so I'm having trouble thinking of other causes of poor mpg, but I know some other guys will chime in and help out. Theres also quiet a few posts about poor mpgs and thinks to look into. I can't quiet remember what it is but i think the EBPS or EBVS or something tube could be dirty and needs to be cleaned. Someone tell me if I'm wrong please. Its something along those lines lol.
But Sgt as far as in town is considered. If I'm driving mainly in town i average about 12.5mpg no matter how I drive. Flooring it or put-puting like a grandpa. On the highway keep it below 2k RPM. Keep in mind our trucks do weigh about 8k lbs so we wont get phenomenal mileage. but 10 sounds a bit low. Especially if your driving is highway. Gives us some more details on what you have done to your truck and what type of driving you mostly do. Do you tow a lot? All city? Highway? a little more will help us out
Not sure what gears.....I havent done anything to it performance wise other than change the oil...I am mostly "rural" driving....8 miles to work on windy roads.....small runs on the highway between the city and larger town near me....I have a F-350...didnt realize yours was only a 3/4 ton...
I have the TW 6 pos tuner, 5" straight pipe, 20"s wrapped in 37" nitto's....after market waste gate actuator, and the K & N like i said....