NOTORIOUS VR
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« Reply #270 on: November 01, 2011, 10:10:53 AM »
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The only applications I see for KFZWOP(2)'s output is in various forms of intervention (torque, charge, lambda, and ignition angle).
Bingo |
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NOTORIOUS VR
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« Reply #271 on: November 18, 2011, 11:13:01 AM »
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For the archives in relation to (possibly) http://nefariousmotorsports.com/forum/index.php/topic,617.msg10182.html#msg10182: In properly operating boost system, DVs open immediately after the driver stops requesting boost by N249 switching on and connecting DV vacuum hose with vacuum reservoir. This forces vacuum into DV immediately and it purges charge. Vacuum reservoir is located behind check valve, this allows it to stay under vacuum even when manifold sees positive pressure.
If you delete N249, you lose the ability to immediately purge DVs via N249 action and must wait until the manifold goes into vacuum all by itself which could take appreciable amount of time... or never if you just slightly let the gas pedal go. In such a case the desired boost might sit at 1000mbar while you're still kicking tires with 20 psi for a second or two before everything calms down. This in turn might cause the overboost condition if the vacuum doesn't kick in quick enough.
KFDLULS defines maximum delta which is easy to exceed without properly operating N249 (or boost leak at DV). Playing with time tables for LDOB might make more sense. One table in particular is very popular with tuners for disabling overboost detection.... TLDOBAN. You zero that one out and it never goes into effect.... Overboost protection with anything larger than k04 is pointless anyway since you will be operating above MAP limit all the time hence the system doesn't work anymore... only gets in the way.
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NOTORIOUS VR
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« Reply #272 on: April 01, 2012, 09:30:22 AM »
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Well, time for a trusty update... been a long time since I've touched the tune on my car... it drove pretty good for the most part... but still nothing I was happy with, especially low to part throttle loads... I decided to implement a range of new ideas from the tuning section (adaptive knock fueling, no catalyst heating, etc, etc). I also wanted to try masterj's latest .xls and see if I could get rid of the some the TQ management problems I've been feeling. I have to say, using the converters in there it developed numbers that looked smooth but they just don't work. I had half way decent low load cruise (better then before I must admit) and the aggressiveness was welcome (I used 10%), but under mid/part throttle (10-15 psi) I had massive oscillations in load/boost... much worse then I am ever used to feeling with stock TQ management settings. Under full throttle pulls it was even worse, the TQ management was not happy at all it was using ignition angle to reign in the load/TQ/whatever and the car felt horrible mid-pull. Only as the load got greater and slower (ie. higher gears) did the car smooth out. 2nd gear full throttle was even worse. I tried to make a few changes here and there that I thought might help (KFZWOP/2 adding and taking away, but it really didn't help and it was obvious the values were just not right). Logs of a 3rd gear pull, as you can see other then the TQ intervention the logs actually look quite good :                  |
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nyet
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« Reply #274 on: April 01, 2012, 10:59:35 AM »
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« Last Edit: April 01, 2012, 11:08:52 AM by nyet »
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NOTORIOUS VR
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« Reply #275 on: April 01, 2012, 11:55:26 AM »
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yeah.. I'm going to do that next... I really need to dive into me7l... I still haven't used it. |
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NOTORIOUS VR
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« Reply #276 on: April 01, 2012, 04:17:43 PM »
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OK took some logs w/ ME7L, for some reason nmot (RPM) isn't correct... it's always around the same? I've attached a few to this post.
Also for some reason now I'm getting positive boot deviation code and my N75 is stock @ 10% no matter what I do... Any suggestions?
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nyet
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« Reply #277 on: April 01, 2012, 04:35:32 PM »
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NOTORIOUS VR
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« Reply #278 on: April 01, 2012, 04:46:54 PM »
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Thanks, I'll underscale my MAF a bit and re-do LDRXN (I did bump it recently)... as for the RPM in ME7L I suppose I will have to post in the Datalogging section to see if anyone has an answer... |
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nyet
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« Reply #279 on: April 01, 2012, 04:58:28 PM »
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Uh. Why are you using the 8 bit nmot? You know there are only 256 possible 8 bit values, right? Use nmot_w  nmot_w , {EngineSpeed} , 0x00F87A, 2, 0x0000, {rpm} , 0, 0, 0.25, 0, {Motordrehzahl} |
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« Last Edit: April 01, 2012, 05:00:03 PM by nyet »
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nyet
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« Reply #280 on: April 01, 2012, 05:02:12 PM »
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Thanks, I'll underscale my MAF a bit and re-do LDRXN (I did bump it recently)...
Make sure your peak LDRXN actually reflects what your turbos can do. Your spec load looks a bit... optimistic. |
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NOTORIOUS VR
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« Reply #281 on: April 01, 2012, 05:10:44 PM »
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Uh. Why are you using the 8 bit nmot? You know there are only 256 possible 8 bit values, right? Use nmot_w nmot_w , {EngineSpeed} , 0x00F87A, 2, 0x0000, {rpm} , 0, 0, 0.25, 0, {Motordrehzahl}Nope, didn't know... I started with the mark_p_typical.cfg.... but thanks, I'll change that. Also, would you have any idea why zwopt doesn't work? It says it cannot find it in the ECU if I leave it enabled? |
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« Last Edit: April 01, 2012, 05:12:32 PM by NOTORIOUS VR »
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s5fourdoor
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« Reply #282 on: April 01, 2012, 05:26:57 PM »
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can you share the KFMIRL / KFMIOP / KFZWOP / KFZWOP tables you mentioned? i'm interested in how you did the interpolation / map transposition.
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NOTORIOUS VR
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« Reply #283 on: April 01, 2012, 06:54:04 PM »
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can you share the KFMIRL / KFMIOP / KFZWOP / KFZWOP tables you mentioned? i'm interested in how you did the interpolation / map transposition.
From which tune? My current or a specific one? Attached are some ME7L logs w/ my tune with a slightly underscaled MAF and more sane LDRXN values... no more pos. boost deviation (funny thing is, it seemed to be the MAF scaling alone causing it. Also with nmot variable fixed... maybe someone can have a look or at least show me what to do with them so I can see what the TQ management is doing at this time. |
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nyet
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« Reply #284 on: April 01, 2012, 08:40:12 PM »
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From which tune? My current or a specific one?
Attached are some ME7L logs w/ my tune with a slightly underscaled MAF and more sane LDRXN values... no more pos. boost deviation (funny thing is, it seemed to be the MAF scaling alone causing it.
reread the s4wiki. The higher your MAF values, the earlier the pos deviation detection starts. Also with nmot variable fixed... maybe someone can have a look or at least show me what to do with them so I can see what the TQ management is doing at this time.
I dont see miist/misol intervention...  Notice miist stays well below misol... Now yours is doing the same as mine.. and i havent' figured out why on mine yet because I haven't logged wkrdy or krldy/zaldy READ THIS! http://nefariousmotorsports.com/forum/index.php?topic=970.msg8735#msg8735and other info here: http://nefariousmotorsports.com/forum/index.php?topic=970.msg8758#msg8758http://nefariousmotorsports.com/forum/index.php?topic=970.msg8923#msg8923Now you need to log zwgru zwsol wkrdy B_krldya B_krldyv zaldy |
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« Last Edit: April 01, 2012, 08:46:26 PM by nyet »
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