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nyet
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« on: November 02, 2012, 02:11:26 PM »
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Symptom - after getting the i-limit set up perfectly, after a while, the car starts overboosting. Clear codes and reset adaptation, overboost goes away. Problem? It appears as though the i-limit adaptation is a drunkards walk - i.e. it ONLY adapts upwards, since the MAP limit prevents the adaptation function from seeing an overboost large enough to cause a negative adaptation. Opinions on best way to fix? Don't say openloop WGDC, thanks  |
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nyet
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« Reply #1 on: November 02, 2012, 02:22:28 PM »
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I'm guessing reduce LDEIAU and TLDIAN?
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nyet
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« Reply #2 on: November 02, 2012, 02:31:10 PM »
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Or, alternately, disable upregulation completely? might be safest...
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prj
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« Reply #3 on: November 02, 2012, 02:36:59 PM »
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Fix the scaling in the ECU and run a big enough MAP sensor  |
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phila_dot
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« Reply #4 on: November 02, 2012, 03:23:03 PM »
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I'm guessing reduce LDEIAU and TLDIAN?
Stop guessing, log.  |
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nyet
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« Reply #5 on: November 02, 2012, 03:50:29 PM »
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I hate both of you.
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nyet
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« Reply #6 on: November 02, 2012, 03:51:58 PM »
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Stop guessing, log. gonna need a WHOLE lot more ram variables How much of the ldr i-limit adaptation path can you find for me  |
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jibberjive
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« Reply #7 on: November 02, 2012, 03:59:34 PM »
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Fix the scaling in the ECU and run a big enough MAP sensor Haha, was going to say the same thing, figure out how to throw a bigger MAP in there, and don't be at the limit |
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prj
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« Reply #8 on: November 02, 2012, 04:22:16 PM »
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Haha, was going to say the same thing, figure out how to throw a bigger MAP in there, and don't be at the limit nyet loves living on the edge! |
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phila_dot
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« Reply #9 on: November 02, 2012, 04:24:08 PM »
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gonna need a WHOLE lot more ram variables How much of the ldr i-limit adaptation path can you find for me I have it all identified and labeled. I can give you the addresses no problem. Is there a specific sub-function you want to start with? |
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nyet
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« Reply #10 on: November 02, 2012, 04:32:03 PM »
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hmm:
ldimxr_w
ldimxrk_w
B_ldimxp
B_ldimxa
B_ldipos
B_ldimxn?
B_ldimxp?
B_stldw?
B_stldia?
(?) not sure if needed
or anything else you think i need for i-limit adaptation?
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phila_dot
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« Reply #11 on: November 02, 2012, 05:42:54 PM »
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hmm:
ldimxr_w
ldimxrk_w
B_ldimxp
B_ldimxa
B_ldipos
B_ldimxn?
B_ldimxp?
B_stldw?
B_stldia?
(?) not sure if needed
or anything else you think i need for i-limit adaptation?
0x382744 ldimxr_w ldimxrk_w (written to GPR only) 0x382742 ldimxak_w 0x38273E ldimn_w 0x382740 ldimx_w 0x00FD96.9 B_ldimxp 0x00FD96.7 B_ldimxa 0x382763.1 B_ldipos 0x00FD96.8 B_ldimxn? 0x00FD96.11 B_stldw? B_stldia? (doesn't exist, hex value 1-4 gets written directly to stldia) 0x380C73 stldia 0x382764 stldia_old |
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nyet
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« Reply #12 on: November 03, 2012, 05:51:37 PM »
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Thanks phila. I'll post results if i get anything that works.
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nyet
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« Reply #13 on: November 27, 2012, 12:29:19 AM »
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Here is what I ended up doing:
First, tried shifting TLDIAPN (RPM is based on k03 spool, so it is pretty aggressive at low rpm) bad news, no matter how far I go out, any persistent lde will result in adaptation. So if you have a stock DSLOFS, and are running past the MAP limit, good luck; the ECU will keep adding I limit forever, since MAP limit is always under requested.
So I chose to nuke it entirely by setting LDEIAP to max (1270) on a locked WG RS6 turbo file (it is locked via KFLDIMX, not KFLDRL)
It is worth noting that stock LDEIAP is actually negative (-20), so even if you aren't over boosting, positive adaptation is enabled.
I'm not quite sure what my approach is going to be for my car (DSLOFS=0)... since really I just want to numb positive adaptation, not completely kill it..
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« Last Edit: November 27, 2012, 03:17:08 PM by nyet »
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nyet
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« Reply #14 on: November 27, 2012, 02:27:48 AM »
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Also, for debugging negative adaptation, I'd need B_ldimxn ... I hope you're still reading phila |
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