shane0569
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« on: May 21, 2013, 05:17:33 PM »
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Hey guys,
I've been running this tune for a while and it seems to be running pretty well. I've just had a suspicion that it is not quite perfect. When driving next to a wall or something I can hear the engine better, and during that time I hear the turbos spool up on hard accel. When the boost gets up towards its max requested, I can hear a sort of choppy kinda whistle, and I think it's the DVs not quite holding the max boost. Car is 00 A6 2.7t. DVs are adjustable Forge Hybrid Splitters running in re-circulation mode. I can't find the max boost spec ANYWHERE for these valves. I have done a pressurized intake boost leak test and it seemed to pass that. Unfortunately, it's harder to test the actual DVs separate for the max boost they will hold. Below is a graph showing a 2nd gear pull. I am running essentially the Notorious Tune, with very few changes. No changes to boost, fueling, etc.
Thanks!
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shane0569
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« Reply #1 on: May 22, 2013, 10:17:03 AM »
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Anybody have any ideas? Need to see any more logs?
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ddillenger
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« Reply #2 on: May 22, 2013, 10:23:11 AM »
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That is not a log shane, it's a picture of boost which means next to nothing.
lol.
Post the full CSV of a 3rd gear 2500-redline log, along with your mods.
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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
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shane0569
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« Reply #3 on: May 22, 2013, 10:36:17 AM »
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Sorry, didn't know what info you wanted to see. Here you go.
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nyet
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« Reply #4 on: May 22, 2013, 11:02:38 AM »
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WGDC is 95% all the way to redline. I'd say you have a boost leak or your DV's aren't holding, like you said. Any particular reason you didn't include WGDC in your picture?  |
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nyet
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« Reply #5 on: May 22, 2013, 11:07:12 AM »
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Also, when logging, please hold your accel pedal at WOT, or ecuxplot will filter that data if you have filter enabled.
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shane0569
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« Reply #6 on: May 22, 2013, 12:17:42 PM »
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Any particular reason you didn't include WGDC in your picture? Thanks. No particular reason...still learning. What does a normal/good duty cycle look like? |
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nyet
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« Reply #7 on: May 22, 2013, 12:59:30 PM »
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Depends entirely on the application... you will probably want to
1) read some materials on turbo/efi tuning
2) log a lot of cars
3) both of the above
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shane0569
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« Reply #8 on: May 22, 2013, 01:14:17 PM »
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ok...I mean, do you rarely see a healthy 2.7t with a WGDC above 50% for example?
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ddillenger
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« Reply #9 on: May 22, 2013, 01:29:29 PM »
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When turbos are spooling WGDC should be high. When they are spooled it should decrease. This is all dependent on how hard they're working to meet requested boost.
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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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shane0569
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« Reply #10 on: May 22, 2013, 03:18:49 PM »
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Thanks,
makes sense. Do you have a graph showing boost and WGDC from your car that I could see?
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ddillenger
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« Reply #11 on: May 22, 2013, 03:57:23 PM »
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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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shane0569
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« Reply #12 on: May 22, 2013, 05:03:26 PM »
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Perfect. Thank-you. Picture definitely lets me know what to look for.
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nyet
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« Reply #13 on: May 23, 2013, 12:39:57 AM »
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ok...I mean, do you rarely see a healthy 2.7t with a WGDC above 50% for example?
Depends on the WG and boost levels. stock k04, stock wg will need 80%+ WGDC to maintain > 20psi at redline k04 knockoffs with tight wastegates will do 23-24psi with 75% |
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« Last Edit: May 23, 2013, 12:44:46 AM by nyet »
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nyet
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« Reply #14 on: May 23, 2013, 12:43:46 AM »
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another example - k04 knockoffs with somewhat tight wastegates.
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« Last Edit: May 23, 2013, 12:45:23 AM by nyet »
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