0x34 Air Density under Master Fuel Correction Reason is what?
This limit wherever it is, is the reason that changing the map so dramatically had no difference in the performance..
Anyone else have an idea?
Post the tune and log
Les,
Question for you. You are saying to request 160 mm3 for "full fuel", but not to rescale the PW table(or any of the tables). The original question by Blevins was about this. The injector PW table I have on my 04.5 is only scaled to 140 mm3. From my experience of many other automotive tuning platforms, if you exceed the maximum scaling of any table, it will no longer interpolate, it will just stay at the value of the highest column. So from how I see this, I could request 300 mm3 and I will still get the pulse width of 140 mm3, since that is the maximum lookup value defined. Am I missing something?
On my early 04 truck, I requested 250 mm3 in the pedal table, and I rescaled the PW map only on the final column, to 260 mm3 and played with the PW only on that one column. It seemed to have the intended result, so I dont believe the requested mm3 amount has any actual math behind it besides being referenced by the limiters and being a lookup value on the PW table. I know it's nowhere an actual quantity of 250, but it was visual for me that I am requesting above the stock amount of fuel. And I scaled most of the tables up to 5k rpm.
It seems like the common theme here is to leave the IPW fuel quantity scale alone and then just lie to the duration time until the desired fuel is provided, but then that would make the 140 mm3 quantity false.
Last edited by Turbo_Mike; 02-13-2016 at 09:50 PM.
2003 305/555 QCSB Cummins
Piston/rod/sleeve/fire ring/dual CP3/300 overs
Super Stick NV5600
S366/S480
You still didn't answer my question or Blevins. Are you intentionally asking for a value higher than the scale to max out the PW table earlier? Are you using that to make more power down low or have a quicker pedal response?
And I got what I asked for. All limiters off and rescaled. Single event injection. And full fuel to 4800.
2003 305/555 QCSB Cummins
Piston/rod/sleeve/fire ring/dual CP3/300 overs
Super Stick NV5600
S366/S480
I am not asking the tune to do anything special...I dont rescale the pulse table nor the pressure table...I only modify the timing RPM axis to where Im looking to run max RPM at.
I have no problem hitting 155-160mm3 on a log with leaving the pulse table maxed at 140mm3.
And yes i have my 140mm3 cells as my max pulse area...I could easily mimic the 6.7's with 160mm3 but I dont see the need to as i can hit my target values as the table sits.
Maybe I am misunderstanding your questions...
I think you are.
mm3.jpg
If I request a value more than 140 (and the limiters allow it) I still will only get the amount of PW that is in the 140 mm3 colum.
MM3 is a lookup value for the limiters and the PW table, not a real amount of fuel, especially once you alter the PW table.
I believe the "TOTAL FUEL RATE" in the logger may be including pre and post events which could explain why it would show more than 140mm3.
I just tuned an 04.5 and I requested 145 in the pedal table main event, and logger shows up to 158 at times. Which makes perfect sense if it was showing my pilot event plus my main event (post was turned off)
If you log main event PW, it wont go any higher than your highest column on the PW table, if you request 160 or 260 its still the 140 PW.
So the only way I could see any benefit of requesting 160 from a 140 table would be to max it out sooner, or to make sure it stays on the 140 coulmn when adders or comps are trying to back it off. This is what I'm trying to understand.
2003 305/555 QCSB Cummins
Piston/rod/sleeve/fire ring/dual CP3/300 overs
Super Stick NV5600
S366/S480
Yes the total fuel rate does include pilot and post on its calculation
This is confirmed. I changed my target to 188 and hit target mm3 the whole time with the same PW.
Target throttle is only going to ask for more fuel or timing if you setup all your tables correctly. So you can use it for a couple things. To hit Max mm3 quicker,to give the throttle more resolution, + Others. This thread is so far off topic at this point. Lets close it out.
2005 Cummins 325/600 G56 3.73
Reving to 4800
Worked Head, Twin Disc, BBI
Yes Les. Here is the picture just for you. Target is 188 + Pilot mm3 = 200 target. same speed, same us of fuel.just for les.png
2005 Cummins 325/600 G56 3.73
Reving to 4800
Worked Head, Twin Disc, BBI
Mopar Matty would u mind posting your tune file and logs to show everyone exactly what you've done on your truck?
Mopar Matty all you have to do is take the picture and make your target MM3 somethign like 188 on the bottom row. The higher you ramp this up along with the row below it the more agressively it gets to your max MM3 which is 140mm3 if you guys are not scaling it higher...
Honestly the rest is just normal stuff.. If your going to request that high you need to also max the air density maps at 300 or somethign over 200... as that still doesnt fully work with the on off switch... But nothing fancy. Mine is fast enough at 2850uS which is the limit on my fueling system atm... with bigger injectors anything more then that empties the rail.
Hope this helps.
http://www.hptuners.com/forum/attach...9&d=1455639929
Last edited by Bamofo; 03-09-2016 at 12:35 PM. Reason: putting in the picture for reference
2005 Cummins 325/600 G56 3.73
Reving to 4800
Worked Head, Twin Disc, BBI