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adam-
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« Reply #15 on: September 10, 2013, 03:10:54 AM »
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No, the point at which it opens..
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Ionut
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« Reply #16 on: September 10, 2013, 03:18:15 AM »
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Will try this boost profile for beginning: 3000 1.25 4000 1.3 5000 1.2 6000 1.1 7000 1.0 If encounter too much knock will lower boost a little untill will get new injectors or new FPR. I`ve opened a new topic few days ago. You can make me suggestions there because this topic i want to keep only for turbo limits: http://nefariousmotorsports.com/forum/index.php?topic=4600.0title= |
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adam-
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« Reply #17 on: September 10, 2013, 03:22:40 AM »
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You've sorted fuelling first, right?
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automan001
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« Reply #18 on: September 10, 2013, 04:29:26 AM »
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What do you mean by crack pressure? Point of failure?
No, the point at which it opens..
The point at which WG starts to open. They say its about 5 psi. |
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Ionut
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« Reply #19 on: September 10, 2013, 07:36:04 AM »
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You've sorted fuelling first, right?
No, because for now i`ll let BTS untouched, so if i`ll add bosst ecu should compensate fueling. If i`ll encounter knock too early be sure i`ll change fueling a little, but in my country a dyno is not a cheap thing. In my city for example is only one dyno, but not for 4x4 and my car is quattro. Also, is not so cheap (~125 USD 2 runs). When will get new injectors and maybe a gt2781 to replace actual turbo (this will be probably next year). I know the difference from turbo diesels and turbo gasoline is big. On diesels if you fail will smoke like hell. On gasoline if you fail will end up with another engine in most of cases. I`m aware of that. That`s reason why i`ve asked about max boost on this type of turbo |
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hammersword
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Revlimit ECU tuning
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« Reply #20 on: September 10, 2013, 07:57:13 AM »
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so you will leave your engine run at 0.69 lambda? lol
1.1 @ 6000
1.0 @ 7000
You need at least 4bar FPR to work on these pressures at these RPM
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Ionut
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« Reply #21 on: September 10, 2013, 08:04:03 AM »
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I`ve looked into BTS table and as i remember the smallest lambda was 0.74. Of course i`ll not let that lambda, but for now i want to have a rough picture of boost.
My LAMFA table has values like 1.95, so i think is setup with BTS fueling from factory.
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hammersword
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« Reply #22 on: September 10, 2013, 03:33:15 PM »
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So you have narrowband management system 400bb
check AFR with wideband from tailpipe
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Ionut
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« Reply #23 on: September 10, 2013, 06:40:18 PM »
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I have a 18CH ECU from an AWT engine. As i know, that engine has come with wideband lambda. If i replace my ecu with that one and make wiring changes to fit the wideband (and of course, change my lambda sensor with required one) will work properly or i need to simulate second lambda sensor?
And i have a lambda sensor from an Audi A8. I think that is wideband too. May i use that to measure lambda on exhaust pipe?
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adam-
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« Reply #24 on: September 11, 2013, 05:47:34 AM »
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Have you read the wiki yet? I've spent over a day on this forum just reading, trying to get a good understanding of how it all works, and I've only just managed to get one.
Spend hours reading through the people that know's post - along with one of the guys in the UK who is the "god" in tuning the 1.8t's, just to see his methods.
Only now, have I got enough of an understanding to see how fueling should go, and when. Read the Wiki, it's key. Fuel first, then boost. Get fueling wrong, and you'll likely melt something.
I've read that so many times I know it off by heart now!
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Ionut
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« Reply #25 on: September 11, 2013, 05:53:55 AM »
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Yes, I`ve read wiki few times and also read ME7 doc.
This topic was an "upper limit" question.
Maybe this topic should be renamed to "How much tune accepts factory hardware" and extend discussion to internals and other engine-related stuff.
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airtite
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« Reply #26 on: November 14, 2013, 05:32:35 AM »
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Have you read the wiki yet? I've spent over a day on this forum just reading, trying to get a good understanding of how it all works, and I've only just managed to get one.
Spend hours reading through the people that know's post - along with one of the guys in the UK who is the "god" in tuning the 1.8t's, just to see his methods.
Only now, have I got enough of an understanding to see how fueling should go, and when. Read the Wiki, it's key. Fuel first, then boost. Get fueling wrong, and you'll likely melt something.
I've read that so many times I know it off by heart now!
I agree 100% that fueling is very important and have the battle scars from that lesson BUT think about it logically if you are running stock boost levels and you adjust fueling you are only going to have to retune fueling when you change your boost anyway. I agree that if you have changed hardware etc then starting with fueling makes sense and I am not advocating increasing the boost to stupid levels and not catering for that fuel wise either. To me increasing boost slowly logging and adjusting fueling/timing makes more sense then adjusting fueling, then increasing boost then going back redoing your fueling.... I am probably totally wrong here but thats just my logic. |
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nyet
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« Reply #27 on: November 21, 2013, 11:36:42 PM »
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So uh, is anybody going to suggest taking a look at the K03 compressor map?
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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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ddillenger
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« Reply #28 on: November 21, 2013, 11:52:15 PM »
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So uh, is anybody going to suggest taking a look at the K03 compressor map?
That would make too much sense. LDRXN=250, DIMX=95 DO WORK. |
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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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Ionut
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« Reply #29 on: November 22, 2013, 01:32:27 AM »
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From my calculations, at 2.4 compression ratio (upper limit where extra work is transformed into heat) will have an airflow of 0.12m^3/s. That means 153.6g/s.
At 6000 rpm we have 3000 strokes per minute (50/sec). So that quantity of air should be enaugh to burn over 100mg of fuel (3.072g/stroke).
with an AFR of 11 theoretically should burn 3072/11 mg of fuel. That`s pure theoretically, without taking looses of heat and fuel + air temperature that makes air less dense.
Is that correct?
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