Combining Tunes

[907DAVE]

So I have been thinking about tuning lately and had an idea, why not combine tunes to have one that can do it all, well almost.
My thought were to have a program that could incorporate economy, daily, and high power. I would have the economy for light cruise, daily for moderate acceleration, and high power for heavy to full throttle. Is this possible? I assume it would take alot of time to get things right but think it would be worth the time invested to accomplish this. Dont get me wrong I think it's pretty cool clicking it up to "6" and standing on it. I would have to have a separate program for towing , because of the shift strategy but would love to have a setting I could leave it it most of the time. What do you guys and gals think?

-Dave

[Jackpine]

I doubt seriously it's possible. Bill, of course, would be able to answer this more definitively, but in engineering, everything is a compromise. You are going to sacrifice power if you opt for economy and vice versa. It's possible to try to improve all parameters over stock, but I doubt you'd be able to maximize any of them if you tried to improve all of them.

- Jack

[cleatus12r]

Here's a thread from a while back.

See in particular the posts from #5 on up.

http://dygytalworld.ehost-services13...ead.php?t=1663

[907DAVE]

Originally Posted by cleatus12r

Here's a thread from a while back.

See in particular the posts from #5 on up.

http://dygytalworld.ehost-services13...ead.php?t=1663

Good read... I understand that each program is geared towards perfecting its intent, tow, economy, etc. I agree with your ideas about APP sensitivity, and tow programming, if my truck can do nothing else it HAS to tow well. Especially around here where roads can become very treacherous. Extreme cold, big hills, icy and bumpy roads mean the truck has to operate very smooth. 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.

[soutthpaw]

I didn't read the link cody posted as I'm on my BB. However an all in one is much more doable on a manual tranny vs automatics.
I just made a tune though that combines features of a couple of bills tunes. 75hp FS with 80 perf. Along with my timing mods for altitude and some expermential tweaking of reduced pulse width and increased ICP in the highway crusing range.
The goal is an increased cruising mpg with the throttle response of the perf tunes. Like cody I don't care for the lazy throttle on stock and FS. But the lower shift points work for me. Also copied the stock TC duty cycle map from stock due to weird Shift issues I posted about a while back on FS. Its in this forum. You really can't make a performance and tow tune together.
I just ran a full tank of fuel with the chip removed to get a baseline and reminder of stock so I can compare the 2.
If you have a pyro gauge u can use a higher hp tune towing but u need to watch the temps if u r into the throttle a lot or on a long climb. to a point the various hp tunes are all about protecting people from themselves so they don't destroy their engine inadvertently.

I actually dropped the smoke and 140hp cuz I almost never used them. That way I have more slots for other tunes.
As of yet I really haven't noticed a significant mpg difference across all tunes inc stock. Pretty much average 16mpg and 2 mpg either side of that.

[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.

[907DAVE]

Originally Posted by cleatus12r

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.

Strange....thought it would be controlled by LOAD/APP/RPM. The shift strategy would be the major focus if I were to try to make a program like this. But it still would be nice to have a little extra go up top. Hmmmmm.......you guys make it sound so simple yet I feel I will be totally lost when time comes to make it happen.

Thanks
Dave