Now it's ON
Unless your butt dyno is scientifically calibrated, I have no choice but to argue!
Gear ratio change: huge difference in feel and performance.
FBW throttle adjustment: huge difference in feel and performance
Shift point and shift time change: huge difference in feel and performance
Yet zero HP/Torque changes.
All those things can be beneficial to both gas mileage and feel, I won't argue that.
Think of the Tow/Haul button on the newer Chevy trucks. When you put it into the Tow/Haul mode, the truck is a completely different animal. Holds RPM longer, shifts harder and quicker and even advances the timing to lower the torque curve. But it is in no way shape or form, more power
. The vast majority of truck owners do not drive around in Tow/Haul mode because they don't like the higher revs and harder shifts, even when it would probably give them a little better gas mileage in the city. The whole point of the Tow/Haul selection is to give a good smooth feel on the highway with decent gas mileage while towing nothing. Then when you have a load, it focuses on getting the weight up to speed quicker and more efficient giving better gas mileage.
Has anybody on here dyno'd a bone stock 5.4/6.8 before and after a "tune"?
I haven't. I just want to get a hand held unit to change my shift points and FBW settings. I do plan on emailing 5Star and seeing if they will put together a trans/FBW tune for me without touching the timing or fuel....