Advice on turning up a Cummins 8.3

[mikey]

I just bumped into a guy at the gas station talking to me about my M931A2. Seemed to know his stuff and he knew it had a Cummins 8.3. He asked me if I turned up the fuel, but I told him I didn't want to lose MPG. He said I'd get better MPG if I turned it up. He said I should turn it up to "2150" or "20% over the rail".

Does that make sense to anyone and would you get better MPG by turning it up?

Thanks

Mikey

 

[Suprman]

There is a thread on bumping the power in the 6cta. I have mine turned up and it seems to use more fuel like this. I also have a heavy foot. I would think if you were light on the pedal then gas mileage should be around the same. Turning up the fuel just gives you the ability to use more fuel.

 

[Ford Mechanic]

Yeah there's a thread devoted to bumping the power on the 6CTA in the Hotroding the 5 ton section. Should be on the 1st page of threads as it's fairly popular.

 

[shadowdd]

I can say that making minor adjustments to the injector pump which like everyone said above really awakens the truck to its full potential.... I find that I don't have to keep my foot all the way in it to maintain speed or climb grades; it just wants to pull!! Seach for the 6cta fuel mods and you will find exact instructions and videos. PM me if you have any questions.

Bryan

 

[wheelspinner]

Any performance upgrade (not efficiency upgrade) will have a resulting increase of fuel usage. Its physics, however just because you have increased performance doesn't mean you always have to use it. Its all about potential. I have my truck turned up (just as in the thread mentioned) and love it.

 

[infidel got me]

I also turned up the fuel on mine,but insteadof going full out i went half way.ex-if video said 4 turns i went 2,adjust 8 clicks i went 4.it has made more power and tourqe,plus i can always go full out and do full turns/clicks.im not going 2 race mustangs but their was diference vs. Stock setup.i'm leaving my setup as is truck does what i want it to and then some -