Datalog Screen Shot

[final5-0]

Datalog Screen Shots

I've had several pm's and calls from Tweecer noobie peeps asking why I don't use the default CalCon playback viewer to analyze datalogs.

Rather than giving an explanation to each peep it would be easier for me to put something together showing a shot of the data in the raw and that same data in a graph view from a typical datalog.

I think this would be the easy way to show how the little play back thing just don't cut it when it comes to being able to see the bigger picture of the data from the datalogs.

Instead of sending out e-mails to each of those peeps, I thought about just putting it up here and everybody could benefit.

I'll get the shots up sometime this weekend but I'm not sure when cause the wife & dawd has got a garage sale goin on

Later
Grady

 

[DFG 5OH]

damn garage sell

 

[final5-0]

OK Guys

What you see here is a couple of screen shots that I combined so I could host just one file.

The raw data from the Tweecer datalog was loaded into an excellent program written by a fellow Tweecer user by the name of Daren Woodall. Once again, I wanna thank Daren for this program that he so kindly has made available to anybody for the best price I know of ...........free, lol. He hangs on the Tweecer forum and you can find his site for the program with ease if you go over there. I won't go into any details about the many great benefits of using this program to analyze your datalogs but I will tell you this ............... You Need This Program!

This particular datalog was made to check my final wot af ratio and the driving conditions were wot in 3rd gear from about 1500 to 6000 rpm.

There were a little over 100 data events and all of them that pertain to the af ratio can be seen in the graph shot. There are 15 other selections or columns of data such as spark, mph, rpm, and the like but since the focus of the datalog was af ratio, I did not have them displayed in the graph. You can however, see some of them in the raw data shot.

The raw data shot is only the last 25% or so of the complete datalog but it is enough for you to get the idea of what it looks like.

There are some notes on the graph shot that I placed around at various places and they are only there because I sometimes send that file to other peeps who ask me about this kind of stuff.

The Tweecer default data playback viewer in CalCon only displays each data event in a window with the numerical value or in the form of a dashboard kind of thing.

Here is another way to think about this example that might help more..........................

If you were gonna evaluate somebody's combo by dyno results , which of these two displays do you wanna see?

1) two columns of hp & tq values at 100 rpm intervals
2) a typical dyno chart that shows the same values

Display 2 will show you the bigger picture of the same data that was in display 1.

A program like Daren's Log Analyst will show the bigger picture of your datalogs just like the dyno chart example from above.

I know this stuff is nothing new to some of the folks on this site but maybe for some, it might give them a bit of understanding about this self tuning stuff.

If anybody has Q's or comments then feel free to speak up.

Later
Grady

 

[final5-0]

ttt for jruppert

grady

 

[5.0_GT_kid]

This looks great Grady...I really don't understand it that much but I'm still learning ya know

When I do get my Tweecer I will make sure to get that program from Mr. Woodall.

 

[stang_dan]

is any of that in english im goin to have alot of reading and guessing and checking whne i get one.. does it come with a manual? lol


im a little fuzzy on how u know whats a good af ratio and all the other stuff. may be too much to ask?

dan

 

[final5-0]

is any of that in english im goin to have alot of reading and guessing and checking whne i get one.. does it come with a manual? lol


im a little fuzzy on how u know whats a good af ratio and all the other stuff. may be too much to ask?

dan

Well Dan

The raw data shot looks pretty english looking to me......just kiddin

As for the good wot af ratio, a rule of thumb or range is about.............
NA = 12.50 to 13.00 parts of air to 1.00 part of fuel
Forced will be a good bit lower and it can vary by a good amount but some run as low as 11.50 to 1.00

Your question about a manual

Using the Tweecer interface is pretty self explanatory. Just change a value in one of the various sections of the program.

What will take some effort on your part is gaining a basic knowledge of the workings of our pcm. After you gain some of that basic knowledge it will become more clear why you would want to make this or that change.

Some of the changes are simple like idle rpm value, spark tip in value, etc and don't really call for any special knowledge.

EEC Analyzer can be helpful with its many tips and it will crunch the data from the datalogs for you and even in some cases, make recommendations for changes.

For the most part, you just kinda learn as you go.

Later
Grady

 

[stang_dan]

Thanks alot for the info im goin to read up on our pcms alot while im in iraq give me something to do in spare time if i have any lol thanks again.
dan

 

[final5-0]

Thanks alot for the info im goin to read up on our pcms alot while im in iraq give me something to do in spare time if i have any lol thanks again.
dan

Dan

Just remember to keep your head down while your doing all that research and thank you for your service.

Will you be able to have access to this site while you are over there?

Later
Grady

 

[stang_dan]

Yes i will have acess to the internet when im over there i plan on ordering everything fro the motor while im there so i get home go on leave relax and build my car. we kind of set up shop over there now. theres a phone center too.

thanks for the thanks.
ill keep u guys updated thanks again
dan

 

[jruppert]

rather interesting..

just out of curiousity, where do you run your spark at? i am starting to fiddle with it but dont know where things should be. i have eec analyzer and tried the mapping option. target is set at default 30 and i have some high 40's.

 

[final5-0]

When driving around town under Closed Loop conditions, you very well could see spark values in the 40's. When I got started in self tuning and was using a non modified t4m0 file, I remember seeing values as high as 46.

For wot driving conditions your gonna be working at your greatest load possible. The top or top two load rows in the base spark table is where most peeps make their changes for wot conditions.

As for the value to use ........................

Each combo can be different and you need to experiment a bit to see what your combo likes.

A range of low and high I've seen peeps use over the years is 26 to 42.

For my combo and using pump gas only, I will run 36 in the winter and drop back to 32-34 in the hot Texas summers for a total advance spark value.

Later
Grady

 

[zenboy99]

Thanks for that Grady, I just bought a Tweecer R/T, don't have my laptop yet though. Any info on the Tweecer is good info.

 

[final5-0]

Thanks for that Grady, I just bought a Tweecer R/T, don't have my laptop yet though. Any info on the Tweecer is good info.

I'm kinda jealous of all you guys who are now getting involved in self tuning these days cause there are so many more sources of help available to you than when I started. Just on this site alone, there quite a few peeps who have had great success at self tuning their rides.

There is bit of general or basic tuning stuff on my site that might be of some help to you. Also a few links to other self tuner sites as well.

Later
Grady