Econ Tune

GeauxTigers · #1 Sun, January 10th, 2010, 10:35 PM

Does anyone have an economy or mpg tune? I've got a 87 perf tune and a 87 tow tune... I want to go ahead and round out my truck with some solid mpg's. I running 35s with stock gears...I wanted to see if anyone had an econ tune on a setup similar to that? What kind of mpg's you were getting, and what to expect overall ?

Thanks for ya time !

***Longshot270*** · #2 Mon, January 11th, 2010, 10:33 AM

An economy tune would probably resemble your performance tune with lowered shifting and maybe some other minor stuff. What kind of mileage are you getting?

***88Racing*** · #3 Mon, January 11th, 2010, 10:50 AM

You may want to try and regear first.
The tires(35's") you are running don't help matters much. Lots of mass to get moving, to keep moving, and to get stopped.

***Jackpine*** · #4 Mon, January 11th, 2010, 11:21 AM

Bill said something about this a while back. He stated there would be very little difference in the two tunes if your driving was mostly highway. I suspect you could achieve the effect of an economy tune by lowering your part throttle upshift and downshift and TC lock and unlock points.

Regardless, I doubt you'd get real "value" from an additional economy tune compared to your 87 performance tune.

I bet there's going to be renewed interest in this subject though, as gas prices inch up (like they're doing).

- Jack

GeauxTigers · #5 Mon, January 11th, 2010, 05:32 PM

Jack,

You're a little over my head on the upshift/downshift etc. Could you elaborate a little more on that. Also, I'm getting better mpg's 14-16.5 with my towing tune than with my performance tune 11-13/14. Don't get me wrong the performance tune is awesome for what its designed to do. Just wanted to see if there was something else I could do to squeeze out 18-20. Some of these guys with 35s are getting better than I do.... just seeing if its wishful thinking

.

But Jack, let me know if there is something I could do get a little more out of my performance or towing tune as it is now in the way of mpgs.

Any other suggestions are acceptable as well including ... stop complaining

***Longshot270*** · #6 Mon, January 11th, 2010, 05:40 PM

Quote:

Originally Posted by GeauxTigers

Jack,

You're a little over my head on the upshift/downshift etc. Could you elaborate a little more on that. Also, I'm getting better mpg's 14-16.5 with my towing tune than with my performance tune 11-13/14. Don't get me wrong the performance tune is awesome for what its designed to do. Just wanted to see if there was something else I could do to squeeze out 18-20. Some of these guys with 35s are getting better than I do.... just seeing if its wishful thinking

.

He is referring to using the custom options menu to lower what MPH markers make the truck shift when your not at WOT. You can lower all of those points causing the truck to shift in a lower RPM (saving gas). The torque converter is pretty much the same. I bet your getting better mileage with the towing tune because you didn't regear after putting on 35s. The truck is needing more torque to turn them.
Next time you are going drive go into the custom options and lower all of the shift points (you can leave the 1-3 gear converter points alone, just lower the 4th gear). And make sure you leave about 10 minutes reprogram. The changes in shift points take a while to program, just in case you cut it close on getting to work.
..Oh and when you do that, lower both your up shift and down shift points so they match up. I'm not quite sure what'll happen if you dont but lets not find out.