I'm not an expert at this and don't claim to be. I really appreciate your help. My main goal is to increase mileage. So, I may not be the typical SCMT user. I can see how there may be a difference in perception between those that baby the throttle and want mileage and those that routinely put the hammer down. Two different issues completely.

I disengaged the cruise at several speeds, from 35 to 80MPH. Under load, e.g., up hill, and while coasting. I got the bump every time. Almost a "clink" in the driveshaft. I was amazed it happened while not under load. Felt as severe as an inappropriate downshift might feel in a manual. It's a major jolt, not at all subtle.

I tried to voice the shift point issue in an early post, and another member said it much better right after my post. In ECON mode vs. STOCK, I felt as if I had to reach too high an RPM to get an upshift on light throttle. Running higher RPMs seems counter to good mileage.

Amazing that these trucks seem to have individual personalities!

Feel free to email me if you need more info/feedback.

 

mine has the driveshaft "bump" too...i think it might be the TC clutch disengaging, and the reason we are feeling it is the fact that the line pressure is boosted by the SCMT....am I even on the right track here, Vic?
Personally, I kind of like it...gives it a rougher *truck* feel...

 

The trucks definitely have different personalities.

In fact, if you want to be technical about it...every computer code has it's own personality. Every truck has different tolerances (remember, these trucks are designed by humans and built by humans....or at least human built machines).
No two are exactly the same...I don't care what anyone says.

Sometimes tolerances add up, sometimes they don't....a few thousanths more...a few thousanths less...it all makes a difference.

Then you have calibration...this is a HUGE HUGE variable.
Each calibration is most certainly different....you can usually tell right away if Ford refashes your PCM. Sometimes this is a good change, sometimes you may not like it.
Each calibration must be tuned different than others to get the correct gains, mileage and drivability.

Because of all of these tuning differences, tuning must be done for each calibration and a generic program can not be forced into each truck. This makes constructing a database more difficult and is part of the reason why so much time is spent in R&D

Did you know a 2003 6.0L or early 04 makes nearly 70 ft lbs more torque stock than a late 04 does stock?

I haven't seen two stock trucks put down the same stock numbers yet.....and I'm using a VERY consistent Superflow dyno.
Once they reach optimal temp, one truck will make the same numbers run after run ...when you strap down another truck it all changes.

 

Will an early 04 with a tuner and a late 04 with a tuner make the same amount of torque or will the late 04 always make 70 ft. lbs. less? Just wondering if the difference was in the computer or physical changes to the engine.

 

An early 03 WITH pilot injection or one that has be detuned by the "black" flash


OBTW, the stock 6-oh's at our dyno day were doing right at 275 hp...
my truck with the +100 hp predator setting did 375... so they "seemed" relatively consistent to us... curious....

 

The tuner does not understand the delta between the two build dates… so it will not correct for the delta of TQ.

Yes, the "late" 04 will always make 70 less, if all variables remain the same. i.e. not a “special” tuner for the late 04

 

See! My hose was bleeding off quite a bit because the HP and Torque curves were flat for over 1,000 RPM. Maybe my truck had another 50-60 HP...
I plan to make another trip to the dyno after I add the water injection. I will have them run a base line before we turn on the Water/alcohol injection.

 

I have a March 03 Huntsville engine. Mine originally ran like a scalded dog. At about 6K miles I started getting the dreaded idle fluctuation and received the Oct flash. I lost the PI and idle fluctuation. I gained MPGs and a little power. I have not received another flash nor will I if I can help it. I have read of so many getting worse MPGs after the October flash...not me.

My point is that Vic's comment is well taken. These trucks are obviously different in many respects.

 

If my truck was updated with the DAXO flash,will it say it on the PCM.

 

Call SC and ask if it will, they will help you out.

 

Vic,

Just curious, how will you know how much to adjust it without my truck? All I told customer service was that it shifted kinda harsh for my liking during low speeds in Econ mode.

 

I can say this about the harsh shifting.
This is very personal thing one mans hard shift is another mans dream, I hope no one believes
this will continue to be a, "can you do it just a bit more"
I think this is awesome that SC is doing this for some.
However....

 

Mine also shifts a little firm in both ECON and HP AND it does the bump thing coming out of cruise control.

 

Wait a minute... I don't want anything to do with an after market modification that may damage my truck's tranny or drivetrain. I seek a mileage improvement and I want my investment in this truck to last.

Given what I feel and hear while running under *my* current SCMT ECON setting, I believe this program is hard on *my* equipment. The mileage is worse because of higher shift points. The clunk I feel/hear when dropping off cruise cannot be good.

This isn't a preference issue, like longbed/shortbed, or cloth/leather. I chose the SCMT and ECON mode to get better economy and that's all I want. But as things stand, I get worse economy and rough shifts that must result in excess wear.

Perhaps we're not talking apples to apples here. I'll buy the point that trucks differ, and that mine is sensitive to the new program and more prone to hard shifts than other trucks. But this isn't just a preference issue. The problem is a showstopper for the SCMT. I won't use it if this can't be resolved. Thankfully, the master is willing to work on the program and I'm willing to see if a retune takes care of things.

I don't expect SC to individually tweak every truck. From what I read, that's not necessary, which is great.

 

To each his own......this is what I wrote "This is very personal thing one mans hard shift is another mans dream" you MAY NOT like it most do, once again a personal thing......and no it will not hurt the truck.