Tow/Haul only settings vs Regular?

[Hit Man X]

Got a question on the Spartan that I didn't see answered on their site, unless I looked over it.

Do they offer the ability to say put a 75hp tune on the T/H mode and maybe drive normally on a 150hp mode?

I'm not trying to turn my 8000lbs truck (or whatever the curb weight is of a CCLB 4x4 F350) into a race vehicle, I have other stuff for that.

I am looking for good economy when cruising... the best it can be for what it is whether loaded and pulling or empty... and not destroy everything in the process. Hell if the 40hp tune returns the highest economy for both modes, then that's what I'm probably going to run.

Thanks

[DavidPhillips]

I'm pretty sure the T/H mode is only controlling the transmission shift. What your asking for is not possible.

[Hit Man X]

Ah well Thanks

[DavidPhillips]

I did think of a way you can do this if you want to.

What you need is a relay that is triggered by a switch or you could trigger it with the tow haul button. When the relay closes it could activate a solenoid that goes under the gas pedal. When the relay is open the solenoid retracts allowing full throttle.

The solenoid could be calibrated for any desired reduction in power.

I'm not sure I would trust it for heavy towing though because the load on a hill or heavy wind could make a huge difference in the actual power so it would have to be calibrated for full load. And your still probably looking at a timing issue which under load may do some damage. Spartan would be the one to answer that question.

But it is technically possible. You could dyno it and calibrate the solenoid for any desired reduction in power.