CasopoliS Posted January 21, 2007 Share Posted January 21, 2007 CSV LOG PLOTTER - online program Airboy CSV ANALYZER - really robust Excel file CSV Log Plotter (online): This is a neat tool that allows you to analyze your .csv log and produce plots. SAMPLE PLOTS (you can select which parameters to plot) http://img444.imageshack.us/img444/5016/plot2zf.jpg XY scatter - Boost vs. RPM http://img207.imageshack.us/img207/706/plot25pe.jpg Link to comment Share on other sites More sharing options...
lookslikeanevo Posted January 21, 2007 Share Posted January 21, 2007 nice i was thinking about this the other night Current:MY05 SWP wagon - 253/290 UP, AEM CAI, Invidia Q300, tuned@yimisport OLD: MY06 GRP - 274/314 Link to comment Share on other sites More sharing options...
2005garnetGT Posted January 22, 2007 Share Posted January 22, 2007 you should check out airboy's awesome log analyzer spreadsheet right here: http://www.enginuity.org/viewtopic.php?t=957 yes, you need excel, but its awesome. Link to comment Share on other sites More sharing options...
mickeyd2005 Posted January 22, 2007 Share Posted January 22, 2007 ^^^ Thanks... that's a goody. Except for the error in his VBA script. It appears he renamed the sheets but forgot to change the VBA script... oh well, easy fix. Link to comment Share on other sites More sharing options...
mickeyd2005 Posted January 22, 2007 Share Posted January 22, 2007 What I really like is that it calculates load... or comes close to calculating the same load as the ECU. I wonder why the ECU calculation is somewhat different. Anyway, that'll help 2006 owners. I don't think anyone every did post the location for the 2006 load. And, that's one less variable for me to log. Link to comment Share on other sites More sharing options...
2005garnetGT Posted January 22, 2007 Share Posted January 22, 2007 I usually just calculated load myself, honestly. its a derived function, so why waste the cycle time. Link to comment Share on other sites More sharing options...
mickeyd2005 Posted January 22, 2007 Share Posted January 22, 2007 As a noob, I do the opposite. I have always logged it (because that's what the instructions says) so this is the first time that I have bothered to look at a spreadsheet calculated value. It varies and is usually 1 to 2% off but can be as high as 4.6% off. It should be identical except for round off error since it is a derived value and is derived from the same ECU recorded values (rpm and MAF). I think the answer lies in the sampling rate/interval. Internally, the ECU has access to much more instantaneous values for RPM and MAF. Calculating the load from data sampled at 0.2 second intervals results in jerky load plots. See attached. I think this can be smoothed out by deriving interpolated values for MAF between samples and then adding a small delay correction. Of course, you can just look at the graph and see the jerkiness... Just a guess. Please correct me if I'm wrong. Anyway, this is a nice spreadsheet. I don't know anything about tuning and what a tuner wants to see and how he wants to see it, but I'm going to use it as a starting point. Link to comment Share on other sites More sharing options...
2005garnetGT Posted January 22, 2007 Share Posted January 22, 2007 are you having boost oscillations? mine don't look anything like that... Link to comment Share on other sites More sharing options...
CasopoliS Posted January 22, 2007 Author Share Posted January 22, 2007 or not taking readings quick enough? Link to comment Share on other sites More sharing options...
mickeyd2005 Posted January 22, 2007 Share Posted January 22, 2007 Maybe. Can you send me a sample log with MAF and boost? Link to comment Share on other sites More sharing options...
mickeyd2005 Posted January 22, 2007 Share Posted January 22, 2007 This is not anything mechanical with the car because any anomalies in the car would still be reflected in the engine load calculation. The calculated load is definitely off by a small amount (a few percent at most). Mine is exagerrated because I am looking at a very narrow band of load between 2.1 and 2.7 g. I am pretty sure this is due to the sampling rate. Every parameter is read at approximately 19 ms intervals. So, if I am recording 10 parameters, the parameters can be anywhere between 19 and 190 ms out of phase. If the parameters are read in the order that ECU explorer records them, then I think it would be a simple matter to write an interpolator to correct for the phase difference. I plotted edmundu's load. His is smoother because his points are so far apart due to his big power. However, even in his, I see about a 2% error. If you scale his plot from 2.1 to 2.7 then you will see a bigger difference. BTW, do you use this excel spreadsheet a lot? I'm finding a lot of bugs in the VBA code especially if you don't run it exactly like the way the author uses it such as grab a .csv file from a different subdirectory. I think it could use some better error trapping. Link to comment Share on other sites More sharing options...
2005garnetGT Posted January 22, 2007 Share Posted January 22, 2007 I mainly use it for timing analysis. you should probably post something about it over at the thread I linked. Link to comment Share on other sites More sharing options...
MarcusDubya77 Posted January 22, 2007 Share Posted January 22, 2007 Delta Dash has a similar program w/ freeware, you just can't use some of the nifty options..you all probably knew that, but I wanted to write something so that I could auto-subscribe to this thread! :woowoo:check out the Diamond Gray Metallic Monster!!! Link to comment Share on other sites More sharing options...
CasopoliS Posted January 22, 2007 Author Share Posted January 22, 2007 updated - put new link in post 1 Link to comment Share on other sites More sharing options...
SubiGT Posted January 23, 2007 Share Posted January 23, 2007 Is there a description somewhere of what engine load is? These graphing aps are pretty cool:) Many Shuvs and Zuuls knew what it was to be roasted in the depths of the Slor that day, I can tell you! Link to comment Share on other sites More sharing options...
2005garnetGT Posted January 23, 2007 Share Posted January 23, 2007 I see another sticky in the making... Link to comment Share on other sites More sharing options...
Jon in CT Posted January 23, 2007 Share Posted January 23, 2007 Is there a description somewhere of what engine load is?In this case it's the amount of air (in grams) consumed by the engine during each revolution. Link to comment Share on other sites More sharing options...
2005garnetGT Posted January 23, 2007 Share Posted January 23, 2007 I wrote it up once over at scoobypedia... its something like maf/(2*rpm/60) Link to comment Share on other sites More sharing options...
SubiGT Posted January 23, 2007 Share Posted January 23, 2007 thx:) Many Shuvs and Zuuls knew what it was to be roasted in the depths of the Slor that day, I can tell you! Link to comment Share on other sites More sharing options...
mickeyd2005 Posted April 20, 2007 Share Posted April 20, 2007 FYI. Airboy updated his spreadsheet. It's really good and I recommend everyone use it to overlay their datalogs on their rom data. Also, I modified Airboy's spreadsheet to scale the load. For example, the stock timing tables only go to 2.5 grams load, but it would be nice to scale it to 3.0 grams load for stage 2. I used to modify it manually but a smooth scale would be nice for surface plots and for using ecuflash linear interpolation. If you guys use my function, please let me know if there are any bugs. I've already found one. http://www.enginuity.org/viewtopic.php?p=16328#16328 Link to comment Share on other sites More sharing options...
CasopoliS Posted April 20, 2007 Author Share Posted April 20, 2007 FYI. Airboy updated his spreadsheet. It's really good and I recommend everyone use it to overlay their datalogs on their rom data. Also, I modified Airboy's spreadsheet to scale the load. For example, the stock timing tables only go to 2.5 grams load, but it would be nice to scale it to 3.0 grams load for stage 2. I used to modify it manually but a smooth scale would be nice for surface plots and for using ecuflash linear interpolation. If you guys use my function, please let me know if there are any bugs. I've already found one. http://www.enginuity.org/viewtopic.php?p=16328#16328 thanks! Link to comment Share on other sites More sharing options...
hogmeat Posted April 22, 2007 Share Posted April 22, 2007 Holy Crap This Is Awesome. I Can't Believe This Only Has 21 Reples I'm pleasantly surprised... It was most certainly worth the couple bucks and 10 mins of my time. CLICK HERE FOR THE HOGZAUST Link to comment Share on other sites More sharing options...
mickeyd2005 Posted April 22, 2007 Share Posted April 22, 2007 Hogmeat, have you tried datalogging with enginuity? It has more defs than ecuexplorer so you can datalog turbo dynamics. Also, if you are running a Cobb OTS map, ask someone with street tuner to give you the tables so that you can paste it into Airboy's spreadsheet. The spreadsheet is a lot more powerful if you have the map data. Link to comment Share on other sites More sharing options...
hogmeat Posted April 22, 2007 Share Posted April 22, 2007 no - i'm running (currently) a PDX map. What is turbo dynamics? Never heard of it... explain? I'm pleasantly surprised... It was most certainly worth the couple bucks and 10 mins of my time. CLICK HERE FOR THE HOGZAUST Link to comment Share on other sites More sharing options...
mickeyd2005 Posted April 22, 2007 Share Posted April 22, 2007 It measures how far off target boost is. IIRC, your log showed 90.2 WGDC and about 10.5 psi at redline. That boost seems low to me considering you have no cats. Link to comment Share on other sites More sharing options...
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