bad mileage...wasup??

[Hank]

Is your suspension and tire size stock? I don't get more than 15 with mine either.

[thomasinnv]

Originally Posted by Hank

One thing I didn't see in your post was fuel filter. Always good to start with a clean one when you are starting to diagnose issues.

good point...i didn't think about that. it has plenty of power and runs great, just thought i should get better mileage.

Originally Posted by Hank

Is your suspension and tire size stock? I don't get more than 15 with mine either.

the truck is completely stock other than the wastegate delete and the diy exhaust brake mod. oh, and of course the super chips tune.

i put the tune back to stock and will see if there is any difference in loaded mileage tomorrow. i will also get the diy intake done in the next week or so.

[thomasinnv]

Originally Posted by siloped

All you really need to do right now is just cut the muffler off or put a muffler delete pipe in place of it.

I did my DIY intake before I Had tuner and it was a very noticable diffrence. The intake and exhaust are definatly worth doing before a tuner.

how much louder will a stock exhaust be with the muffler removed? i don't mind a little noise, but i don't want it to sound like a sherman tank coming down the road.

[somebodyelse5]

it wont be much louder with stock exhaust if you just take off the muff. it will sound good but wont be LOUD. different tones as in 3" vs 4" vs 5". but essentially the same sound

[NCHornet]

First of all, Welcome to the ORG!!
Now, you are playing with fire driving, especially towing with a programmer and no gauges!! Stop this now!! Order the proper gauges, PM me for more info.
Next your F350 may have 4:10 in the rear diff, and if so 15 is about right, you should be able to get 10-12 towing a 11K fiver, unless you are towing in the mountains and then 8-0 is about right, hard to believe you were doing that good with the V10, if you were you were doing good!!! Now letting the 7.3 breathe will help a lot. Contrary to what is popular on the internet, you don't need a 4" exhaust unless you are building big HP!! The factory 3.5' exhaust is perfectly fine, the restriction is in the factory muffler that necks down the exhaust to 2.5" and then further restricts it by throwing it through an offset muffler!! Replace the factory muffler with a Walker BTM, ($45) from Napa and it is a straight shot 3.5" , combine this with a better flowing intake like the DIY Tymar or the Ford AIS and you will see a big improvement. You need to do the supporting mods before you add more ponies. If you do things right you will have usable power, power is useless if you have to let off the go pedal due to high EGT's!! With my mods I have never had to back off, and even towing heavy up steep grades, no worries. EGT's are controlled by good airflow and better tuning, niether of which you have yet. Here is the order you need to progress
Gauges
Intake, exhaust mods,
support auto trans with a tuned Valvebody
Only now should you be adding extra ponies, and then the only two I would choose from is DP or TW for your tunes.
Good luck and feel free to PM me with any ?

NCH

[thomasinnv]

Originally Posted by NCHornet

First of all, Welcome to the ORG!!
Now, you are playing with fire driving, especially towing with a programmer and no gauges!! Stop this now!! Order the proper gauges, PM me for more info.
Next your F350 may have 4:10 in the rear diff, and if so 15 is about right, you should be able to get 10-12 towing a 11K fiver, unless you are towing in the mountains and then 8-0 is about right, hard to believe you were doing that good with the V10, if you were you were doing good!!! Now letting the 7.3 breathe will help a lot. Contrary to what is popular on the internet, you don't need a 4" exhaust unless you are building big HP!! The factory 3.5' exhaust is perfectly fine, the restriction is in the factory muffler that necks down the exhaust to 2.5" and then further restricts it by throwing it through an offset muffler!! Replace the factory muffler with a Walker BTM, ($45) from Napa and it is a straight shot 3.5" , combine this with a better flowing intake like the DIY Tymar or the Ford AIS and you will see a big improvement. You need to do the supporting mods before you add more ponies. If you do things right you will have usable power, power is useless if you have to let off the go pedal due to high EGT's!! With my mods I have never had to back off, and even towing heavy up steep grades, no worries. EGT's are controlled by good airflow and better tuning, niether of which you have yet. Here is the order you need to progress
Gauges
Intake, exhaust mods,
support auto trans with a tuned Valvebody
Only now should you be adding extra ponies, and then the only two I would choose from is DP or TW for your tunes.
Good luck and feel free to PM me with any ?

NCH

i do have guages, just not a boost guage yet. i have a pyro and trans temp. i am going to do the diy intake in the next few days, and i will just delete the muffler as soon as i can get somewhere to do it for me. (i am on the road right now...full time rver)

[Stroken49s]

Do you a Cold Air Intake, Call a FORD store, give them your VIN and they should be able to tell you what rear end you have.

[NCHornet]

It would really help us out if you would fill out your sig so we know what we are working on and what has been done to it already. If you need help with that let me know. Full Timers huh!! Heading South for the Winter? I am jealous as I love RVing, I have a 31ft bumper pull that only got used once this year with the prices of diesel fuel!!
Happy Trails

NCH