MCC TUNING

[torque beast]

I have only adjusted duration and timing in the past but am trying a different approach. Trying to play with torque to fuel and figure out how that converts to duration. If someone could dumb it down for me I would appreciate it. Also, for boost do I adjust the map that says" boost as a function of torque and engine speed" or " desired boost"?

 

[torque beast]

Is everyone just changing the duration and timing tables or are you using the torque to fuel?

 

[torque beast]

Come on guys. I know a lot of you have done this. Not looking to compete with any tune makers I just want to do my own. I have actually referred a lot of friends to buy tunes from vendors on this site. I have no interest in being responsible for any truck other than my own. With that being said I understand there are people who will so if you would rather pm me or call me that would be great too. The one I built by just changing duration and timing works fine but I feel like there is a better way.

 

[redwhitenblue]

Is there a list of table descriptions?

 

[torque beast]

Not that I'm aware of. The best I could find is some info posted by Bentley several years ago talking about using the torque to fuel table and accelerator to torque table

 

[drunk on diesel]

accelerator to torque and torque to fuel are somewhat arbitrary numbers... they're just calculations

if you're unable to wrap your head around what they mean, just make a small change to ONE table and see what it does...

 

[torque beast]

I understand what the tables do but I'm unsure whether or not I need to touch the duration and timing tables if I change the torque tables. From what I understand the duration and timing tables go off of the torque to fuel


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[torque beast]

I built a calculator that figures the timing for me when I adjust the duration. Each cell had different percentages depending on load, rpm ect... That has been the easiest way for me but am curious about using the torque tables


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[drunk on diesel]

it's arbitrary... you could scale it from 0-1000 or you can scale it from 0-800 or whatever... you can make throttle sensitivity/curve adjustments on the accelerator:torque

but you could also adjust throttle sensitivity by adjusting torque:fuel

or by adjusting duration

or by adjusting LBF

they all intertwine and adjusting any single one of them will change the truck in similar ways

When you have multiple engineers programming on the same platform, you strive to have the numbers correlate to actual numbers... but we're doubling/tripling the torque, so...

and when it's just you tuning on it, you don't necessarily have to follow someone else's protocol, you can just make adjustments where you want to.

I'm sure that's the ADHD/scatterbrain method and would make an engineer cringe to hear, but I'm not an engineer, I don't tune trucks for a living, and I'm a scatterbrain

 

[torque beast]

I guess what I'm confused about is: let's say torque/fuel is 110 and duration is at 1000. If I change the torque/fuel to 125 will the duration and timing adjust for it? From what I've read if the torque/fuel says 110 then the duration for that amount of fuel would be 1000 so if I change the torque/fuel to 125 then the duration should automatically adjust to 1xxx. Right?


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[ckrueg]

I guess what I'm confused about is: let's say torque/fuel is 110 and duration is at 1000. If I change the torque/fuel to 125 will the duration and timing adjust for it? From what I've read if the torque/fuel says 110 then the duration for that amount of fuel would be 1000 so if I change the torque/fuel to 125 then the duration should automatically adjust to 1xxx. Right?


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From what I have seen that is true as long as the duration table has a value for 125 fuel mass. Although I have mostly just adjusted my 6.4 so that might be different on the 6.7.

 

[torque beast]

That's what I am not sure about. For example, h&s tune shows acc to torque at 100% demanding 1174 torque but the duration table only shows 9?? In the axis


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[drunk on diesel]

I guess what I'm confused about is: let's say torque/fuel is 110 and duration is at 1000. If I change the torque/fuel to 125 will the duration and timing adjust for it? From what I've read if the torque/fuel says 110 then the duration for that amount of fuel would be 1000 so if I change the torque/fuel to 125 then the duration should automatically adjust to 1xxx. Right?


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everything will adjust/calculate

duration will be whatever amount corresponds to 125 at a given pressure.

if your duration map has the same amount of duration at 110 that it does at 125, then duration would not increase. If your duration map maxed out at 110, I don't know that it would continue the curve of duration increase and extrapolate beyond your max.

But if you had a 110 cell at 1.000 and a 140 cell at 1.500 and you commanded 125, then yes, it would fire 1.250 duration

look at the "show table graph" button. You can also do it on linear charts. Notice that there are lines/planes connecting each point.

 

[drunk on diesel]

That's what I am not sure about. For example, h&s tune shows acc to torque at 100% demanding 1174 torque but the duration table only shows 9?? In the axis


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I don't know what the computer does to extrapolate beyond the max axis value if you command above it.

But I feel like it might to some extent. But I also feel like even if it doesn't, if you command higher than the axis, you KNOW you're at WOT

 

[torque beast]

Well it looks like I will still have to adjust the duration