I have a F450 with a flatbed that is used in wrecking service. it weights about 15000 pounds. THe truck is has a 7.3 auto 4x4. I an getting 10 miles to the gallon stock. added a superchip and mileage dropped to 8. Need some advice how to get better mileage..and hold off on the lose weight comments.. nothing else to cut off. also the superchip makes it sound like it wants to die when i come to a stop ( maybe a bad tuner)?
I get 11 mpg towing @ 25,000 lbs and get 15 on the freeway driving hard , you need to call DP Tuner for a good chip and put in an intake and exhaust too.
it has the exhaust already open and a DIY intake, so i am taking it the superchip is the problem. who should i call for a custom tuner? name, phone number?
definatly dp-tuner man.. I was getting 300 miles to a tank in city driving on stock and i tried my 140tune for a week and i got 354miles to the tank. Thats driving with some sense though. highway i was getting around 460miles 2 the tank. i was impressed. getting from NC to central PA on one tank helps alot.
What gears do you have in the diff?
I agree with the intake, exhaust and custom tunes.
I'd also consider a larger turbo, and maybe a shift kit.
Kinda hard to not work a truck with that much weight, so make it more efficient
Well, I was mainly asking the OP.
I'm guessing he has 4.56's or something to that effect. that much weight, even with an auto, he'd almost have to...
That would kill highway mileage... but be alot better around town.
My truck is pretty heavy also although not quite as heavy as yours. I think mine is over 10k. I have noticed the same thing with the chip. Fuel economy goes down with the tuning although some programs give better economy than others, but none of them seem to give better than stock. I am not sure that going with another chip will give you better economy. Going with a specialized tuner like DP has a number of other benefits over a generic tuner though.
Based on your fuel economy I would guess that you have 4.30 gears. The trucks with 4.88 gears often get quite a bit less than 10mpg with stock tuning. If you went to 4.10 gears, that might help a bit.
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