Exploring A New Idea

[Big Dave]

When the old injectors were pulled, there was no visible carbon on the tips.

[GasSavers_SD26]

Answered. Thanks! You use additives regularly or just as it comes out of the pump?

[GasSavers_SD26]

About two months in, Dave, what's the next step? What are your thoughts?

[Big Dave]

I will be posting on test results shortly.

[Big Dave]

After 3,000 miles of testing my conclusion is:

They help, but not much. About 0.5 MPG improvement on a 26 MPG truck.

I'd recommend them if it is new for freshening up your injectors. MPG driving befuddles most tuners but I did work out a couple of decent ones.

Tell your tuner: More timing advance, less fuel, more ICP.

[GasSavers_SD26]

Originally Posted by Big Dave

Tell your tuner: More timing advance, less fuel, more ICP.

Ok, so can you fool your manual transmission EOT and ICP a little more to work better?

I know the EOT on an automatic is linked to some things on the trans shift strategy, but I might not be completely correct.

[99metro]

Interesting thread. 26mpg is pretty dang good for an F350!

Isn't there a CPS that can get you a little advanced timing?
Who did the tuning?

This winter I'm hopping up the F250 with 190hp (single-shot) injectors, a D66 turbo and a TW chip. I want to get an economy setting on the chip. Allegedly, TW can set it up based on your configuration. I know my injectors are worn pretty good (245k miles). I need the power for towing, but want the economy when I'm not. I'm already using an Edge Evolution programmer, and can still get good FE on Stock or Extreme settings - it's all in the foot.

[Big Dave]

Swamp Donkey did my programming and the injectors. He did six different tunes. Three were undrivable.

Three were usable.
One was a fangs-out MPG tune. One was a lesser MPG tune. One was a regular permance tune with s shallower fuel ramp.

The fangs out tune was best but the perfomance (smoke screen) tune was second but I had to drive it entirely differently.With the MPG tune I upshift at 1200 RPM. Do that with the performance tune resulted in black smoke. Not good. But if I upshifted at 1700 RPM, no smoke and nice low EGTs.

The difference in the MPG tune and the performance tune was 0.3 MPG.