VF tuning collaboration and BS

I second that!

 

That map isn't really designed to be flashed and used as is.
It's one of my older files during testing and I just copy / pasted that old torque 3D trans table on.

It's purpose is to just be an example to go off of. Not to use

 

I’m still sitting here studying the maps and trying to plan which ones to apply and @Vlady just f’ing SENDS IT!!!

Well played.

 

Ok, thank you

 

What i notices is that on my testing hill I did downshift to 4th, got a good acceleration and the tranny upshifted to 5th ..and a few sec later to 6th, which never happened before
Again, this is driving in S and set to 6th gear.
So there is some improvement. The functionality is not quite there.

 

My assumption was Mat posted the tune with examples for maps not as a complete tune. In looking at it, it didn’t look like a complete ready to roll tune.

 

I just copied values for those 3d tables.
I Frankenstein'ed the tune by taking @PapaRee version as a base. Updated accelerator throttle request table and made some changes to 4-5 downshift/upshift.
I'm not gonna go to vvt, DI . There is enough power for me

 

took for another spin. Truck drives great, but I'm "glass half empty" person.

Me climbing the hill in D. Speed 89, accelerator 28. Continued accelerating to 113, accelerator is the same 27.7

My 4-5 upshift table is a copy from the morning post.


The truck suppose to upshift, right?
Put in S (see the status of the S selector) and the upshift happened right away Speed 112, accelerator 27.7

I continued to a next big incline in S. Downshifted 2x and upshifted right back.
i don't get how these shift points work. the number are all over once you reference them to the real data.

Anyway, there is a away to use all 6 gears now.

 

I know lots of people have been working on the 04b33 and others...has there been many working on the 04c20? I have a new one and before flashing the taco I was curious to see if people have had success with the tune posted in the first post. If successfully it will give me something to flash and then start doing a comparison break down to start learning.

Thanks in advance!

 

It shouldnt have shifted... You were WAY under the curve especially at 89 kph. Have you tried graphing your shift maps and using .885 as a modifier for the speeds in VFtuner? I input yours and if you were going 89 kph (55 mph) you either needed to get up to 127 kph (79 mph) at the same pedal % or let off the pedal until you were at around 11% in order to upshift to 5.

EDIT: these numbers are all assuming you're on stock gears

 

I figured that i need to be over 80 mph and had it shifted at that speed. What numbers do you think I need to have do upshift between 65 -75? I have been lowering and up'ing numbers for past week without any luck. Why .885?
And why it upshifts in its own in S?

 

You’re chasing your tail trying to get it to shift how you want just using the 2d maps. The whole point is that the calculation is complex and based off more than one map. The 3d torque tables are one of them. You also need to tune those maps, important to remember that Mats example values may not make your truck do what you want on your tune.

The shifting algorithm is different between D and S.

 

I opened the factory stock file maps in Primary Shift 1-5, 6,8, and ECT, in some of the maps all numbers were identical BUT some the accelerator angles were different. @Vlady...maybe that is your issue. Tough to explain you need to open up a stock file and all these maps too compare and see the difference.

 

I played with the angles from stock, newer ecu and my own.

ok. here are 3 tables that have a different profile 1,10,S. I selected the speed 107 (s has slight different and for the sake of the conversation lets assume it is the same), my throttle position was 26*, plate was 30*.

to me table 10 has the higher value in given condition between 2 points, S has a smallest at 26 and 2nd highest at 30. Assume these are the tables, should I bump table 1's 30* value to match S or 10? Is that simple?

 

At what pedal % do you want it to shift? I'll check later today and get back to you on what it should. .885 is the number I finally came to after testing and more testing that makes the VFTuner speed convert to MPH. This was hard to pin down using techstream to log shift points because there is a delay between a shift being requested and a shift actually occurring. So basically just monitored the shift points at the lowest speeds with 1% throttle and deciphered the conversion number that way. But the numbers work flawlessly for me now.

Not sure why it still upshifts in S. Maybe S mode only takes the lowest value possible as criteria for an upshift?

 

Sent you a little gas money. Thanks for the work and developing the dacruiser tune . it's working great for me. Now I'm eyeing the nitro gears. . .

 

this is where it gets tricky. once downshifted, the position of the accelerator is changing and I usually have to back out a bit due to higher RPMS in 4th vs.5th. I find myself 10 points lower at the same or higher speed. Then, I start pushing the accelerator to catch up with a previous accel position, looking for upshift.
my understanding of the upshift is that you current speed and the angle are at or higher a value in the map, correct?

 

So +/- .885 to the speeds in the tables will result in +/- 1mph? Or did I misunderstand?

 

Correct. But keep in mind as you start making changes to the higher pedal input the delay between a shift request and shift occurrence starts to get bigger. For example at low speed the upshift will occur pretty much at the speed you expect from the table conversion. But at full throttle the shift could occur as much as 10 MPH AFTER what you've set in the table. In 2nd gear at WOT mines set up to shift at 55 MPH (which is when its requested) but the actual shifts is felt at almost 65 because of the delay. You want to dial stuff like that back so you dont hit the rev limiter.

 

That makes sense. Thanks for figuring out the .885. Now I can finally make realistic adjustments and have a good idea exactly how much it’s adjusting by.