No Prob Paul
I wouldn't call the thread worthless!
I'm gonna try and keep a perspective from a noobie in this reply
I'm gonna take some time and tell you how I think it would kinda go for you to get started with using the Tweecer method of self tuning.
Warning ... This is definitely gonna be long
so
you may not wanna stay for my twisted view point here
I myself don't have different files on different switch positions. I reckon it has turned out that way simply because my Stang is a weekend toy only.
I guess you could call my file
"The Aggressive Tune"
and it is in use at all times
That is how it is for MY application
As for YOUR application Paul
In my post above, I was not all that clear
I was kinda blown away with the concept of trying to build a tune for someone else because the idea of doing it keeps surfacing again and again no matter how many times I turn my back side to it, so I guess I was a bit distracted when I posted my reply.
Allow me be more specific with my thoughts if you please.
You asked for several files for different applications.
How YOU (not me or any other seasoned Tweecer user) would go about doing that is to first build a main file using as many default pcm values as possible. This first file would work reasonably well for general driving around town conditions. The focus here would be on everything BUT wot.
You then would break out the wide band and get things all setup for WOT.
At this point in time you could say you got your general, all around purpose, NA only, file built for driving around town.
You could then fine tune that main file. Your focus for that file would be on fuel/spark tables for a second file which you might call your 1/4 mile NA only tune.
You then could build other files for:
juice
low octane
etc
This will take some time and the amount you invest depends a good bit on the amount and kind of mods you've chosen.
You MUST remember this
You are not just tuning here
You're LEARNING to tune as you go at this point in time
Soooo ... having said that ... for an overview ........
how about we break it down a bit to some simple steps
and
guess at a rough ... very rough ... time line
How much time are we talking about
Different peeps have different viewpoints that is for sure
Those who wanna ... learn more will take more time
Those who wanna ... just make some noticeable improvements with drivability will not have as much time invested.
These days the info is WAY WAY more easy to find
so
that helps to cut down on the amount of time it takes for a noobie to start to see the big pic
I'm gonna now go out on a limb here
I'd say a 2 or 3 evenings after work or maybe a Saturday to get accustomed to using the Tweecer interface and EEC Analyzer.
I'd say about the same amount of time gathering the info needed to ... START ... NOT MASTERING ... the learning process. This is where you should copy and paste all info you find to your hard drive as you will be building your self tuner notes. You will come back to these over and over. You'll also be adding more info as you find it.
You now wanna read this stuff over SEVERAL times
with
the focus being on ... NOT ... learning anything specific
Just let it all kinda go in and keep an open mind about it all
IMHO ... If you let yourself ...........
you'll find you can quickly become overwhelmed
because
at this point in time ..........
not much of the info makes a whole lotta sense
This where different personalities become involved here
Some have a tolerance to persevere more than others
Only you can know that about yourself
It would seem to me .........
if one has a low tolerence in this kinda thing
they would be better off to take it in smaller steps
which will of course take more time
Bottom line is to NOT get too flustered
or
One may become defeated before they get very far
anyway .........
Time spent for this last step
Hard to say as some pick up stuff quicker than others
I don't know maybe a few evenings for some
or
maybe a week or so for others
Again ... your focus here is to ONLY START to understand
because
As soon as you are to that point ... your gonna BEGIN ............
the hands on part of your self taught, self tuning, education
Its kinda like when you were a little school boy
and the teacher told you
We are now gonna start the lab part of the class
It gets to be way more fun from this point on
You now start to change simple stuff like:
idle speed
tip in spark retard
fan temps on/off
etc
At this early point in time, you wanna drive around capturing data to your hard drive. You wanna do this many times with each time being done under a different driving condition and all the while keeping accurate notes about each dlog. This will give you an idea about how everything all ties in together like load, spark, commanded fuel ratio, and stuff like that.
These datalogging runs are gonna take you some time
but
they are SO VERY IMPORTANT in your learning process
Remember ... At this point in time ...
it is all about a condition we call Closed Loop
and
NOT about a condition we call Open Loop or WOT.
I'd say time wise, maybe several evenings or a week
because
not only do you wanna do the runs to gather up the data
you gotta analyze them as well
I can say this for certain
For most peeps
This is where it all kinda sorta starts to fall in place
Lookie Here! ... I've seen this over and over with many peeps
Those who have not put the above basics in place which enables themselves to gain a solid or basic knowledge database are usually not very happy self tuning campers
OR IN OTHER WORDS
They wanna improve something
but
They don't have a clue how it works
Hey ... its just part of the learning process
Don't forget this .........
You're trying to learn how the pcm does its thing
Once you understand the HOW of it
The WHY of making a change is a ... Piece O Cake
Come on Now! ... Ain't that how it is ... with most things you wanna learn all about ... You start with the basics and build on em a little at a time to the point where you start to see the light
anyway ... moving on with this novel
Lets sum up the Closed Loop portion of the tune!
Your gonna hose around with stuff like:
maf transfer
injector timing
inj values
air flow values
and
other stuff needed to obtain a stable idle and good Closed Loop driving conditions.
You ought to be able to find some noticeable Closed Loop drivability improvement in a few evenings
Of course it will take longer as you perfect the tune.
Heck some peeps who really get into the self tuning thing and wanna learn a good bit about it all will spend months and months learning stuff.
I've done just that very thing and I still learn stuff daily.
Its no biggie for me as I have a whole lotta fun with it all.
Now ... lets move on to the WOT portion of the tune
First things First with a little caution
Here is where you gotta be a bit careful
as
you can do damage here
You dial back the spark a good bit
and
your first efforts are for a target af ratio that is fat
This gives you more margin for error
You go slow and make small changes at the beginning and verify those changes with your dlogs until you learn all about what it means to have < and > airflow, pulse width, commanded ratio, and the like.
Specific info is not needed as it has all been said before. You basically work with the wide band, upper portion of the maf curve, and fuel tables.
When your wb matches your lambse values you are done with the basic WOT portion of the tune
At this point, you can change your ratio by simply changing fuel table values and the wb is not really needed for verification when you wanna go leaner or fatter
I'd say a ballpark time frame to set up your basic WOT af ratio would be a few evenings or maybe a Saturday.
Final WOT tuning would be to slowly bring back in some spark and fine tune the spark/fuel tables to EXACTLY what your combo likes.
As for different tunes ..............
You modify that main file to what application you desire for the new file.
Say you wanna use low grade octane gas ............
Common sense would dictate .........
a bit less spark
and
a maybe bit lower ratio.
All Rightie Then ... That was a bunch of stuff
Maybe it will make some kind of sense or help someone
Lets end this novel
Ya'll holler if something don't look quite right or make sense
Others may have done differently
but
Thats how I done did it
Gitter Done
Grady
