05-02-2014, 11:44 AM | #15 | |
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To use the existing tools you need to divide logs into OL and CL and do different things with each. I haven't used the Java one, but from what I've read you still need to separate the logs. My idea would take any logs, with a mix of OL and CL and do all the work for you. You could in theory have one log that is an hour long with half a dozen WOT pulls and a bunch of mixed driving, or 10 logs with 5 minutes of mixed driving each, plus WOT logs, etc. To use raw logs like that now you need to manipulate them in excel (including the time stamp column). I'm not saying the app I was thinking of making would fundamentally change the underlying logic, it would basically just do both OL and CL at the same time from one or more log. It could also be written to include validation on how "good" the logs are, etc.
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05-02-2014, 12:10 PM | #16 | |
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05-02-2014, 12:36 PM | #17 | |
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05-02-2014, 12:46 PM | #18 |
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So is vgi application enough for maf scaling? Does it mean i could install a Perrin CAI 3" or any other intake and use the apps to scale the maf sensor?
For someone using OFT tunes is it a good idea to rescale the maf just to have a more accurate maf table specific to my own car? (I'm asking these question because my car run slightly on the rich side at wot, low 11) Last edited by Victor Draken; 05-02-2014 at 01:04 PM. |
05-02-2014, 01:02 PM | #19 | |
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05-02-2014, 03:17 PM | #20 | |
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Your tools looks to be the best yet as I had scaled my MAF using other less polished tools, haven't actually tried because I have not been home.
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05-02-2014, 03:19 PM | #21 | |
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The desire to build the app like I want it is to suit my personal laziness around manually manipulating logs, not because the existing tools won't work. If I can import half a dozen mixed logs and have it sort it all out without me needing to edit anything in excel it not only takes out some potential for human error, it also makes it simpler to test and use. The *sigh* was because the post it quoted was taken out of context for what I wanted to do with my app, not a reflection on the current tools.
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05-02-2014, 03:50 PM | #22 |
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Before i knew of vgi's app I made my own to do closed-loop scaling from multiple OFT logs at once. It's console-only but if you're interested and know C# I could share the code. I was going to throw it up as a web app eventually -- maybe we can work together.
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05-02-2014, 03:54 PM | #23 |
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C# is what I do, porting to a web app would be trivial!
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05-02-2014, 06:05 PM | #24 |
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The java tool does not need to have different logs for OL and CL. I use the same one for both.
I'm not sure if it can add multiple logs, I'm not sure it would be hard to get it to do that though. Adding my MAF rescale tool here too: https://dl.dropboxusercontent.com/u/...20Rescale.xlsx
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05-03-2014, 06:14 AM | #25 |
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Who else here has found the temperature compensation for the fueling is off by a good amount. While logging with about 90-95 degrees IAT's vs. 70-75* IAT's I found that fuel trims can vary about 4-5% for any given MAF voltage. Anyone else notice this? Fuel trim go up in hotter temps but get trimmed back in lower temps, it seems.
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05-03-2014, 06:45 AM | #26 | |
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the sensor is trying to measure mass of air colder air more dense so it most likely needs to add fuel so moves fuel trim positive. not sure will have to think about it Last edited by steve99; 05-03-2014 at 07:03 AM. |
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05-03-2014, 07:54 AM | #27 | |
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Apparently it is the other way around, maybe it is adding fuel for cooling in hot weather?
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05-03-2014, 05:56 PM | #28 |
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It looks like the computer makes too much compensation for temps in the base fueling causing the AFR to go rich in lower temps but lean in hotter temps. Once the AFR registers fueling adjustment is made via fuel trims.
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