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OldhaQ
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Post subject: Re: VVL thresholds / parameters / logic Posted: Sun Nov 04, 2012 7:16 am |
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| RomRaider Donator |
Joined: Thu May 03, 2012 8:27 am Posts: 13 Location: Redcliffe, Queensland, Australia
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Ok got it. Sorry about that, I'm not totally sure what is or not relevant, so I just logged everything that was enabled by default when the logger def connected to the ecu. I suppose I should trim them down to rpm, loads, injector and ocv duty, vvl and throttle.
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td-d
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Post subject: Re: VVL thresholds / parameters / logic Posted: Sun Nov 04, 2012 7:34 am |
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Joined: Thu May 20, 2010 4:01 am Posts: 3117 Location: Johannesburg, South Africa
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OldhaQ wrote: Ok got it. Sorry about that, I'm not totally sure what is or not relevant, so I just logged everything that was enabled by default when the logger def connected to the ecu. I suppose I should trim them down to rpm, loads, injector and ocv duty, vvl and throttle. No worries - we all have to start somewhere! I highly recommend NSFW's thread - viewtopic.php?f=33&t=5384. I'm going to craft some custom logger addresses for you as well over the next couple of days, so I can test the function of some of these parameters.
_________________ He who dies with the most gadgets wins.
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throttlehappy
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Post subject: Re: VVL thresholds / parameters / logic Posted: Sun Nov 04, 2012 8:57 am |
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| Senior Member |
Joined: Sat Feb 12, 2011 7:27 pm Posts: 2031 Location: Northern NSW
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td-d wrote: So Matt - other than the Rpm and OSV duty thresholds, in tuning other platforms, which other thresholds would practically be useful? I ask because there are many, many thresholds, some of which are related to CELs which may not really be required from a tuning point of view. Is engine load available?(ie over 1.3g/rev = on, under 1.1g/rev off) Also injector pulsewidth? That would be about the minimums needed
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OldhaQ
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Post subject: Re: VVL thresholds / parameters / logic Posted: Mon Nov 05, 2012 7:23 am |
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| RomRaider Donator |
Joined: Thu May 03, 2012 8:27 am Posts: 13 Location: Redcliffe, Queensland, Australia
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td-d
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Post subject: Re: VVL thresholds / parameters / logic Posted: Mon Nov 05, 2012 11:59 am |
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| Moderator |
Joined: Thu May 20, 2010 4:01 am Posts: 3117 Location: Johannesburg, South Africa
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Well, those pulls confirm another set of tables for me - RPM vs TPS % angle.
If you look at all those WOT pulls, the VVL mode switches from 1 to 3 at around 2050RPMs each time.
This is why.
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td-d
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Post subject: Re: VVL thresholds / parameters / logic Posted: Mon Nov 05, 2012 12:08 pm |
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| Moderator |
Joined: Thu May 20, 2010 4:01 am Posts: 3117 Location: Johannesburg, South Africa
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If you want to confirm this, here's the revised definition - raise the 2400 cell of table A (which seems to be the dominant table at play) to 90%. If I'm right, the logs should show the switch over on WOT only occurring at 2400. I would change it back to stock values thereafter.
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_________________ He who dies with the most gadgets wins.
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OldhaQ
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Post subject: Re: VVL thresholds / parameters / logic Posted: Tue Nov 06, 2012 9:15 am |
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| RomRaider Donator |
Joined: Thu May 03, 2012 8:27 am Posts: 13 Location: Redcliffe, Queensland, Australia
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td-d
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Post subject: Re: VVL thresholds / parameters / logic Posted: Tue Nov 06, 2012 10:51 am |
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| Moderator |
Joined: Thu May 20, 2010 4:01 am Posts: 3117 Location: Johannesburg, South Africa
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OldhaQ wrote: Yep, today's pull confirm that. https://docs.google.com/folder/d/0B__qK ... NkYjg/editI think I was imagining any extra power associated with VVL thresholds before tho, seems as tho WOT will open them up anyway? Exactly what I was thinking last nightwhen I discovered these tables (and saw your first logs) - system is already set up for WOT to kick in high mode as early as possible.
_________________ He who dies with the most gadgets wins.
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throttlehappy
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Post subject: Re: VVL thresholds / parameters / logic Posted: Tue Nov 06, 2012 12:58 pm |
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| Senior Member |
Joined: Sat Feb 12, 2011 7:27 pm Posts: 2031 Location: Northern NSW
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OldhaQ wrote: some more pulls from today... https://docs.google.com/folder/d/0B__qK ... ZhNGs/editfrom page 1 throttlehappy wrote: Then tune car with VVL ON from a lower point(3000rpm, too low and you pull oil away from crank bearings) Could there be a way to fix this oil problem? No real benefit, you really need vvl past peak avcs anyway to be causing a cam retard restriction that would inhibit airflow thus need more valve lift Also, protect your bearings is priority!
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throttlehappy
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Post subject: Re: VVL thresholds / parameters / logic Posted: Sat Jun 22, 2013 1:49 pm |
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| Senior Member |
Joined: Sat Feb 12, 2011 7:27 pm Posts: 2031 Location: Northern NSW
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OK, so this is the 2.5i VVL system explained for PZEV - Excuse the Copy/Pasta from where I wrote it originally  So I had a few questions lately about how the VVL system(aka AVLS) in the 2.5i works and have devised a brief summary based on the email replies that should cover the blanket response  The EJ25 AVLS is not for 'performance' the VVL system is there for fuel economy, with the concept actually stolen from Honda with their VTEC-E Engines... that is VTEC - E with the E for Economy and is one reason why the USA has the 2.5i listed as a PZEV. Here is an article on the VTEC-E engine http://www.b18c5eg.com/VTEC/sohcvtece.htmlwhich further explains how fuel economy is achieved by only having one inlet valve open below 3000rpm and the factory tune running fully in closed loop with 14.7:1 AFR's for fuel economy and lower emissions. Above 3000rpm, the factory tune actually richens up by 7% to account for the sudden rush of airflow generated by the second cam lobe activating  Attachment: SUBARU_EJ25_i-AVLS.jpg As you can see, only 1 inlet valve opens with the second yellow pin activating the second inlet valve when required  Once exhaust mods or intake mods are done, the added engine flow dictates that the AVLS RPM point should be lowered to eliminate the single inlet valve as being a restriction but if you want to keep fuel economy, it can still be achieved with stock AVLS rpm by tweaking the AVLS airflow value so once airflow goes past a predetermined value that is considered a restriction, the AVLS activates, even if engine rpm is not high enough, just need to set the fuel table to add fuel above this value 
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td-d
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Post subject: Re: VVL thresholds / parameters / logic Posted: Tue Jan 28, 2014 9:57 am |
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| Moderator |
Joined: Thu May 20, 2010 4:01 am Posts: 3117 Location: Johannesburg, South Africa
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I was requested to pull these out for D0XJ001P, and in doing so trawled the logic much more comprehensively. OSV current is a key variable in all this logic. I've uploaded the Alpha definition onto Github, here. Here's a picture of all the tables / parameters revealed:
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_________________ He who dies with the most gadgets wins.
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td-d
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Post subject: Re: VVL thresholds / parameters / logic Posted: Thu Apr 16, 2015 6:00 pm |
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| Moderator |
Joined: Thu May 20, 2010 4:01 am Posts: 3117 Location: Johannesburg, South Africa
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I was requested to pull these out for D0XJ002S - Ecuflash definition uploaded onto Github here.
_________________ He who dies with the most gadgets wins.
Please do not PM me - use the email option.
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td-d
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Post subject: Re: VVL thresholds / parameters / logic Posted: Thu Apr 23, 2015 5:16 pm |
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| Moderator |
Joined: Thu May 20, 2010 4:01 am Posts: 3117 Location: Johannesburg, South Africa
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_________________ He who dies with the most gadgets wins.
Please do not PM me - use the email option.
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covertrussian
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Post subject: Re: VVL thresholds / parameters / logic Posted: Mon Aug 15, 2016 4:07 pm |
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| RomRaider Donator |
Joined: Tue Jan 28, 2014 10:48 am Posts: 120
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td-d, If you can define the AVLS tables for EE5K801W, I can do a lot of testing since I have a 2.5i Outback now. P.S. The EE5K801W definition on you GitHub page has an error at line 219, it's missing the table address thus ECUFlash doesn't load the bins correctly, I commented out line 219 and ECUFlash became happy with it  .
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vaccine
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Post subject: Re: VVL thresholds / parameters / logic Posted: Thu Apr 20, 2017 9:12 pm |
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| RomRaider Donator |
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Joined: Sat Oct 06, 2007 11:57 pm Posts: 60 Location: Land of Kangaroos.
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Is it possible to get the Alpha VVL defs for the D2WD610H AUD 2004 Liberty 3.0 R Have gone turbo and wanting to make sure this is all setup correctly.
I would assume D2ZS002D would be very similar or the same, but my assembly skills are lacking.
Thx.
_________________ ... Dave
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