karrann
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« on: May 06, 2013, 08:39:28 AM »
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So I've been researching and I would like to bypass/delete my N249 in my B5 S4. To my understanding it will throw a code, what needs to be changed in the file to have no code for deleting N249? S4 wiki didn't yield any results. Thanks in advance.
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nyet
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« Reply #1 on: May 06, 2013, 09:30:57 AM »
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What problem are you trying to solve by removing the N249?
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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3iverson
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« Reply #2 on: May 06, 2013, 02:00:50 PM »
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i wanna delete too  |
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nyet
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« Reply #3 on: May 06, 2013, 02:03:18 PM »
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What problem are you trying to solve by deleting the N249?
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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catbed
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« Reply #4 on: May 06, 2013, 02:31:14 PM »
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What problem are you trying to solve by deleting the N249?
"Cluttered engine bay" most likely  |
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phila_dot
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« Reply #5 on: May 06, 2013, 02:59:11 PM »
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What problem are you trying to solve by deleting the N249?
Working turbos  |
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nyet
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« Reply #6 on: May 06, 2013, 03:08:43 PM »
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Working turbos A++ |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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karrann
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« Reply #7 on: May 06, 2013, 07:23:14 PM »
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No problem. A friend of mine did it and it seems to run fine. From what I've been reading most of the people that have done it dont have any problems but the people that warn against it are the once who haven't tried it. Most turbo cars Dv run off manifold pressure anyway, I don't see why it would cause harm to the S4.
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ddillenger
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« Reply #8 on: May 06, 2013, 08:02:43 PM »
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No problem. A friend of mine did it and it seems to run fine. From what I've been reading most of the people that have done it dont have any problems but the people that warn against it are the once who haven't tried it. Most turbo cars Dv run off manifold pressure anyway, I don't see why it would cause harm to the S4.
Most of the people who've done it are ignorant to the detriment as they're the same people that haven't figured out how to take and interpret logs. |
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
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karrann
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« Reply #9 on: May 06, 2013, 08:13:04 PM »
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Can anyone tell me why to keep it there? Any actual evidence thats its actually useful? I've been searching a lot of forums and of all the people that have bypassed it 2 have reverted back. Also read NOTORIOUS VR mentioning to delete it many times.
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ddillenger
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« Reply #10 on: May 06, 2013, 08:34:25 PM »
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Without the n249, when you let off the throttle there is a delay before the diverters can open due to a lack of vacuum in the manifold. The n249 prevents this by sending stored vacuum to the DV's to open them immediately. Without it there is a large pressure spike when the throttle plate closes. This air slams into the compressors and causes a drastic drop in turbine speed.
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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rnagy86
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« Reply #11 on: May 07, 2013, 12:31:15 AM »
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It is also impossible for the ECU to open the DVs to release pressure in case it's necessary. By deleting the N249 you are also deleting a failsafe.
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prj
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« Reply #12 on: May 07, 2013, 01:12:54 AM »
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Can anyone tell me why to keep it there? Yeah, turbo life and re-spool speed... You might as well remove the dump valves altogether, clearly they are not needed for the car to run  |
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ddillenger
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« Reply #13 on: May 07, 2013, 01:27:44 AM »
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Nothing like stalling the compressors with a wall of air travelling the wrong direction.
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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sweegie
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« Reply #14 on: May 07, 2013, 10:03:16 AM »
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Should we also start a debate about installing the DV's in reverse?
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