Combining Tunes

[cleatus12r]

Originally Posted by 907dave

Besides towing, I dont see why there could not be a Daily tune that (sorry diesel guys) could be more like driving a NA gas rig. Not lookin to set speed / hp records with a Daily tune just think that it could "do" a little more. Maybe I just have not had a good one yet. Guess thats were live tuning comes in.

There are ways of getting what you want. In all honesty, there are very few differences in "daily driving" tunes and performance tunes as far as fuel injection rates and SOI are concerned. Most performance tunes can be mirrored to daily driving tunes. The main differences come with shift points, shift feel, and torque converter clutch apply strategies.

I have had success in actually mapping out shift timing that changes significantly from the first 1/3 of accelerator pedal travel to the second 2/3 of travel. This gives early, comfortable shifts when not on the go-pedal and crisp, later shifts after 1/3 APP. The torque converter is tricky here because the apply speeds are only a guideline. There are always discrepancies in the speed unless parameters in the tuning are changed allow an accurate and "repeatable" TCC apply every time whenever you want it to. Again, more than 1/3 APP would be more aggressive. Unfortunately I haven't figured out how to vary TCC apply rate with a given calculated load. The duty cycle ramp rate in the tuning is based on fluid temperature and time...not load or APP.

Hope this helps.