Okay, let me describe my truck so you know what I'm dealing with:
2003 24 valve Cummins 4x4 with a 6 speed
35" tires
Banks tuner (I keep it on 2)
Banks exhuast
Running ALL synthetic fluids:thumbsup:
Now to me this combo should get 15-16 MPG city.. But I did the math (the right way, the only way) by filling the tank, writing down the mileage, running it down to half, refilling it, and dividing the amount of miles driven by the amount of diesel used.
IT CAME OUT TO 12.5 MPG!
I don't get it, I oly have 83,000 miles (just broken in), shouldn't I be doing better??? I do have 2 straight through mufflers to cut down on noise because just the banks was LOUD.
Whenever I shifted I tried to keep rpms low, around 1500. I also had the tuner on 2.
And I KNOW I should get better mileage because my granddads automatic with the 6.7L and stock echuast is getting 13.7.
Driving style?? I didn't drive like a granny, but I didn't drive like I stole it either?
did you reset the speedo after installing 35's? they would throw off the mileage. get rid of one of the mufflers, they are only hurting performance. its redundant anyways. thats all i can think of. i dont know much about banks stuff.
did you reset the speedo after installing 35's? they would throw off the mileage. get rid of one of the mufflers, they are only hurting performance. its redundant anyways. thats all i can think of. i dont know much about banks stuff.
Truck in my sig (115,000 miles)........I get about 15 back and forth to work (about 50/50 back roads and town) and about 20 on the highway. Turn your box or programmer UP. That'll change the timing and net you better MPG.
I don't trust it, I wish it was right though!! 15-16 MPG city.
And my tuner is the Banks 6 gun, and its a 2005 model. Will this tuner work the same as others?? All I know is that my truck barely smoke on level 4.... as to where my dads SMOKES with his Bullydog on level 1.
WHOA WHOA wait a minute. You have a '05 box on a '03 truck? That may be your problem right there. They are different engines. Your's should be a HO with the 6 speed trans, but either way, that's a different than the '05 engines.
I'm no Banks guy, but LOTS of people dislike his products. Claimed to be overpriced for what they are. IMO, I'd get something different.
WHOA WHOA wait a minute. You have a '05 box on a '03 truck? That may be your problem right there. They are different engines. Is your's a HO or a SO engine? Either way, they are both different than the '05 engines.
I'm no Banks guy, but LOTS of people dislike his products. Claimed to be overpriced for what they are. IMO, I'd get something different.
Whoops no I meant that the tuner was made in 05' because I wasn't sure if they had upgraded them today to different standards. Its for an 03' truck, but the tunr was made in 2005.
Biggest thing, is that you have to add about 12% to your number of miles traveled on your trip meter. If your trip meter says 100 miles, you actually traveled 112 miles. Because of the taller tires. This will give you more miles, therefore making your MPG higher.
You think I would be better off turning my tuner up to like 3 or 4 or keep it on 1 or 2? And is it better to keep RPM's low or around the 1800-2000 range when you shift?
I put about 60k on the truck a year. I shift by 2k when empty and about 2.4k when hauling. I run 305/75/17, cai, straight pipe. I cruise at 72 excatly and I run 2 cycle oil and I get 21.2 empty 14.3 haulin. My best mpg's was 23.5 once but I was out in Indianna 72mph and pool table flat.
Buy or borrow a GPS unit to get the exact mileage. You're going way farther than your odometer reads. Might be a good time to consider a Smarty which can correct your speedo/odo. and give you more throttle response. How do you like the Centerlines?
I put my truck on level 1 on the Banks and drove like a grandma for 165 miles (yes I added the 8% for oversized tires), nice and easy on the peddle, never laid into it, and always shifting at 2000 RPM.
I got 14.23 MPG. :thumbsup: Not bad for 80lb tires on every wheel!!
I am now trying it on level 4, which should add around 70 HP. I'll see what it does now.
you should be getting better then that. at that speed you should be at 18 atleast. what does ur truck have for a rear end. I have the 3:73's and at 72 2,150 rpms 6spd and I get 21mpg. hand calculated
I got 17 MPG. And my overhead read 20.5 MPG. I drove like a grandma and shifted at 1500 - 1600 RPM. Anything lower and exhuast temps go whacky and I loose MPG's.
Thats a good 2.5 MPG over what I got before!!! Thats on Banks level 1.
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