Tezotto01
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« on: June 18, 2019, 07:51:43 AM »
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I'm working on an E100 calibration with RS4 injectors and HPFP booster in an Audi A3 vehicle equipped with MED9.1
I'm having a limitation above 3600RPM, the target boost starts to drop (from 2500mb to 1560mb).
I made the N75 work 100% (via LDRPID and LDTVMA) to boost my boost to the maximum, I know this is not correct but I wanted to see the result.
I have the accelerator plate closing after the 3600RPM and after the 5200RPM I start to notice the ignition faults, everything indicates that it is a level 1 and 2 torque intervention.
I have tried several paths with no result, I thought the limitation by mitibgr_w but I changed FKTTIMI without result.
I stress that if I go back KRKATE to stock and fill with E70 I do not have this situation anymore, the boost comes linear and without limitation, so I understand that my limitation is directly related to KRKATE
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Tezotto01
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« Reply #1 on: June 18, 2019, 08:05:15 AM »
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I'm with STG2 in this car, all changes have been successful and the car is perfect with original E70 and KRKATE.
KRKATE oem = 0.033330; KRKATE E100 = 0.040670
It is noteworthy that the fuel pressures are well and the requested lambda follows the lambda target, the motronic does not register any errors.
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nyet
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« Reply #2 on: June 18, 2019, 08:14:32 AM »
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I made the N75 work 100% (via LDRPID and LDTVMA) to boost my boost to the maximum, I know this is not correct but I wanted to see the result.
You are going to burn out your N75. It is a solenoid. NEVER run solenoids at 100% DC |
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Tezotto01
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« Reply #3 on: June 18, 2019, 09:15:21 AM »
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You are going to burn out your N75. It is a solenoid. NEVER run solenoids at 100% DC
Yes, I know, I made it to the test character, it only gets 100% in wot |
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Tezotto01
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« Reply #4 on: June 18, 2019, 09:26:22 AM »
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Follow log for best review
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cherry
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« Reply #5 on: June 18, 2019, 10:46:34 AM »
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Lambda? Ignition retard?
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Tezotto01
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« Reply #6 on: June 18, 2019, 11:31:08 AM »
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Lambda? Ignition retard?
According to first post, lambda follows the requested and I have ignition delay |
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IamwhoIam
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« Reply #7 on: June 18, 2019, 11:31:48 AM »
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I don't see requested/actual lambda, short term fuel trim AND injector opening times in your logs. You might find out you're running out of injectors...
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I have no logs because I have a boost gauge (makes things easier)
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Tezotto01
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« Reply #8 on: June 18, 2019, 11:43:28 AM »
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I don't see requested/actual lambda, short term fuel trim AND injector opening times in your logs. You might find out you're running out of injectors...
I'm going to log you on requesting this data. I have already verified that the lambda real follows the lambda target in other logs I have made, and that the injection time is well cleared inside the window. One thing I forgot to observe is short-term correction. |
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yxx499
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« Reply #9 on: June 18, 2019, 12:13:09 PM »
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I heard more variations of "injection windows" at different tuners, so better post the logs...
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Tezotto01
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« Reply #10 on: June 18, 2019, 04:14:02 PM »
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I really made a serious mistake forgetting to check the short-term fix, it's coming in at 25% correction and that's certainly what's making the accelerator board close.
I will make the corrections in FKKVS and certainly my problem will be solved, I see that I will need a bigger HPFP because if I request more than 90 bar between 3500 and 4500RPM the pressure can not follow the specified, today I am with a piston of 9.8mm and I'll provide a 10.4mm.
As soon as it evolves in the project I update.
Thank you all for your help.
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BlackT
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« Reply #11 on: June 18, 2019, 10:55:46 PM »
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You are going to burn out your N75. It is a solenoid. NEVER run solenoids at 100% DC
I will must correct you. Long time ago, when I get my first AEB engine, i feed 12V over the switch direct to N75. And when I need power i press switch, sometimes that switch will be on more that 10-15 minutes. All that didn't harm N75 it still works normal even today |
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nyet
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« Reply #12 on: June 18, 2019, 11:19:02 PM »
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I will must correct you. Long time ago, when I get my first AEB engine, i feed 12V over the switch direct to N75. And when I need power i press switch, sometimes that switch will be on more that 10-15 minutes. All that didn't harm N75 it still works normal even today
And yet i have burned out more than one solenoid (and driver) by running 100% dc. Don't do it. |
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Blazius
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« Reply #13 on: June 19, 2019, 01:26:58 AM »
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I will must correct you. Long time ago, when I get my first AEB engine, i feed 12V over the switch direct to N75. And when I need power i press switch, sometimes that switch will be on more that 10-15 minutes. All that didn't harm N75 it still works normal even today
Solenoids should never run above 95% DC, this is the same with injectors etc. Simple electrical stuff, if you run them at 100% dc a lot, intentionally or unintentionally sooner or later its going to fail. |
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IamwhoIam
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« Reply #14 on: June 19, 2019, 02:40:16 AM »
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So it turns out that you WERE running out of injectors (AND HPFP) and the ECU was only trying to save your ass, but because you're such an experienced tuner, you didn't even bother to check your injection TIMES (not windows FFS) or your STFTs.
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I have no logs because I have a boost gauge (makes things easier)
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