New tables

[FUBAR]

Can someone please explain to me the new tables in the pre-release? E2536 Fuel Limiter, Table Selection 2 and E2567 Equivalence Ratio Limit (Especially this one.) Are one these the tables the one we have been looking for regarding the 2800RPM full fuel limiter? Or Torque Limiter?

[Dmaxink]

Yes it is (for the most part) those tables... Obviously you can see where mm3 is being limited by E2536 and the limiting is starting around 2700rpms so that makes sense. The Eq ratio table is part of the limiting culprit also. My results beta testing were anything above 2 would cause no limting...i did not see a advantage of going above 2, however. Hope this answer a couple of the questions...There is still some limiting going on, but with all the tricks i have full fueling to 3800 rpms. We are still yet to try the big pulse tune, but holds 2450 no problem.

[GMPX]

We are getting a number of Emails with limiting problems still, you aren't alone.
We are continuing to work on it as best we can, unfortunately reverse engineering isn't an exact science, but at least we do seem to be making progress with each small update.

[Dmaxink]

Ross... keep up the great work, we by no means are complaining about the groundbreaking accomplishments you guys are introducing to the cummins community!

[GMPX]

Dmaxink, I certainly didn't take it as criticism, knowing the problem exists is the only way it can be fixed after all. It's not like we are the first company to be left scratching our heads with the Cummins ECM, it's a pretty unique piece of hardware for sure.

Probably the hardest part is trying to fix the problem via the internet, it's tough not having a vehicle strapped on a dyno and playing with changes we think might make a difference.

[FUBAR]

Good deal. So what is a Equivalence Ratio? And what "Base" (0,1,2,3,4) tables in the column are E2536 viewing from. Basically, which ones in the tunetool?

Thanks,

[GMPX]

Ok, Equivalence Ratio (EQ Ratio) is essentially the fuel mixture. A little over the top Wiki Explanation can be read HERE (http://en.wikipedia.org/wiki/Equivalence_ratio#Equivalence_ratio). We assumed this table could be used by the ECM to limit injector pulse width if it thought the Air/Fuel ration would result in smoke. Remember, OEM's do not want smoke.
The 0,1,2,3 thing relates those those Air Density selections. Base + 1,2,3,4. Base just looked silly in the axis label. I'm guessing most will just get set to max anyway.

[DoghouseDiesel]

Ross,

Could you send me the pre release please?

I'm strapping the truck back on the dyno tomorrow and would like to see what we get.

[GMPX]

You can grab it right here:
http://forum.efilive.com/showthread.php?16919-Pre-Release-Update-July-27-2011

Cheers,
Ross

[DoghouseDiesel]

You can grab it right here:
http://forum.efilive.com/showthread.php?16919-Pre-Release-Update-July-27-2011

Cheers,
Ross

....and the blind man sees the light.

Thanks Ross.

[FUBAR]

I have to say, my tune fuels A LOT harder after modding the new tables. How much? I need to inspect my logs more closely to give definitive numbers. Thumbs up though!

[1slo_CR]

Can someone please explain to me the new tables in the pre-release? E2536 Fuel Limiter, Table Selection 2 and E2567 Equivalence Ratio Limit (Especially this one.) Are one these the tables the one we have been looking for regarding the 2800RPM full fuel limiter? Or Torque Limiter?

??? Not to sure here either?

Looking for some input about the "Fuel Limiter, Boost" too...?

[LReiff]

I finally got some dyno time, power still drops above 2800rpm.

[Dmaxink]

LReiff..have you changed the axis points in your tunes?

[97singlecab]

The new tables work great for me. Here is the difference is dyno sheets. The truck carried 140mm3 all the way to 3800 on this run which is where I let out.

http://i959.photobucket.com/albums/ae71/mikehaller4815/dyno.jpg

[MQ105]

That's good. Can we see the data logs that show full commanded fuel throughout the run? Thanks.

[FUBAR]

I've got no problem carrying 140mm3 up to those rpm's, it's the pulsewidth that's still the demon.

[MQ105]

I'd like to see the logs, and know what you changed to allow it.

Thanks

[FUBAR]

Axis Tables. Think of it like this, the set guidelines in some of the tables mis-represent what our engine is really capable of.

[FUBAR]

Here, it's 150mm3ish at 2800RPM and tapers down to 130mm3 at 3600RPM. 3200rpm shown here in the log is at 140mm3.11683

[MQ105]

Ok. The de-fueling is the inability to maintain maximum commanded fuel.The assumption is that 140mm3 is the maximum commanded fuel volume at full throttle. If you've changed the axis to represent a higher number, then to have full fuel you must command that number throughout the rpm range while at 100% throttle. Regardless of the actual number, if commanded fuel drops below maximum at 100% throttle, de-fueling is occurring.
Your commanded fuel drops past 2800 rpm, which is the same as every other log I have seen - mine included.
Again, the number itself is not what is important; maintaining maximum commanded volume is. Until we can figure out how to get the actual volume we are commanding in the program (or determine why we are not), we haven't solved this issue.
I agree that the two most recent tables have helped, but I think there is still more in the ecm to be discovered.

[anarchydiesel]

The problem with dropping mm3 seems to be a problem with auto trucks only. Our manual test truck will hold a solid commanded fuel up to about 3600 RPMs then it begins to drop off. Now the actual duration begins dropping at around 2800 still, but that is another demon. MQ105- what rpm are you limiting your truck to?

[Dmaxink]

Anarchy- same issue here... the beta team is working on this as we speak.

[FUBAR]

Anarchy, I'm limiting my rpm's to 4200. So the auto limiting must have merit against the manual thing. I too agree that there has to be more in the ECM we're not seeing...Marco's probably trolling these boards laughing his rear off..saying, "It's right freaking there, under your nose! Don't you see it!?" Lol.

[MQ105]

...MQ105- what rpm are you limiting your truck to?

Soft limiter is set at 4k, hard limiter at 4200.

[06dodgecr]

my manual trucks will hold mm3 as well as autos.. My truck was a auto and held a good 160mm3 to 3600 then taperd to 130 by 4200. but I installed a manual and now it wont go past 100mm3 no matter what tabels I change but im still runniing the auto map which I think could be the problem?? ever swapped trans yet and had this problem.. and how can marco be laughing.. I know guys who have his tntr tune and there mm3 does the same thing at 3400-3600.. he hasnt figured it out yet either.. I havent tried ssr though.

[FUBAR]

Just a little humor. His does taper off too, not as bad. But I can say not changing anything in my tune, but changing what "file" it wrote over gives me more fuel.

[Dmaxink]

I'm laughing because Efilive has only been supporting the cmb platform for such a short time and they run sooo much better than any option Smarty has come with! We can make more power than Smarty already without blacking out the highway and making them mannerly...its wonderful lol

[comnrailpwr]

I m just excited we dont have to be part of a cool kid circle jerk crowd like we had too to get TNT-R. I had it but it took about 50 emails and 20 phone calls to get it. Smarty was the best product at that time and still are great for most ppl. Support availability is a -1 compared to efilive tho.. Finally a company that supports us all and treats us equally.

Spray & Pray

[LReiff]

...Our manual test truck will hold a solid commanded fuel up to about 3600 RPMs then it begins to drop off. Now the actual duration begins dropping at around 2800 still,...

This is exactly what I'm seeing! I'm limited at 4200 and it's a manual trans. I started out by disabling the post injection and ended up bringing it back on around 2600 rpm, either way the end result is similar. I now can truly say that I prefer no post.