A few thoughts about being a Tweecer noobie
A really important thing to understand ... right off the bat is ...
You need to understand the least amount about the Tweecer
and
You need to understand the most amount about how the pcm works
Still more important than the Tweecer would be ...
How the motor will behave when you + or - fuel and spark
When you get started with self tuning and look at your first default file
You can get overwhelmed real quick :Word:
Its no biggie really ... You just start out with some basic, simple stuff
After you get all checked out on how to ...
save a file with your tweecs
upload that file to the pcm
capture data to a file
analyze that file
You got the basics of how to tune your Stang
Then ... The only thing left would be for you to ask the most important Q
W H Y ... would I want to make a change
Allow me to elaborate with a simple example
As a noobie you start off with an OEM file with OEM values ... Right?
Say you got a h/c/i combo that won't idle ... You ask the Q ... Why?
Common Sense Tells You .........
Hardware (combo) is no longer compatible with Software (OEM pcm values)
You ask yourself about the pcm and how it works at idle
For this little example ... we will just deal with 2 parameters
1 Idle value
2 Airflow values
1) The OEM value for idle is 644 rpm
W A Y too low for a combo with those kinds of hot rod parts
threfore
You reason ... Why ... a change needs to be made
Bump it up for less grief and more relief
Make Sense
2) Lets keep it simple here but still reason out ... Why ... Make a change
A little stocker Stang (OEM values in the pcm) .....
It it gonna generate more or less airflow at idle than a h/c/i combo ???
See where I'm going here
Bump up the airflow values by about 20%
and
You'll be in the ballpark
Again ... Make Sense
Thats kinda how the thought process goes for me
then again
Friends tell me I peep at life through a different kehole than they do
Here is what I think is the best way to relate to .....
Whats going on during different driving conditions
and
What in the world is the pcm doing during those conditions
I call it ... 30 seconds of focused data gathering
You do one and ONLY ONE thing at a time while datalogging
Quick Example and this novel will be done
Say you wanna learn a bit about ... LOAD
You do 3, 4, or maybe 5, 30 second datalogs
All conditions are exactly the same ... You know ...
like 3rd gear ... almost closed throttle ... like 15 mph ... level road
You accelerate from 15 mph to say 45 mph
Only thing different on the various runs is how you accelerate
Run #1 is like you got an egg between your foot and the skinny pedal
Run #5 is WOT
Runs 2-4 would be in between the two extremes
See where we are going here
You look at the load values in each d log and see how it relates to
throttle position
amount of rpm
closed loop or open loop
and more
HEY ... Look at enough raw data
and
YOU WILL ... start to see how it all comes together
Hope all that junk makes some kind of sense
but
If I was not all that clear some where
Ask ... and I'll try to clarify
Grady
A really important thing to understand ... right off the bat is ...
You need to understand the least amount about the Tweecer
and
You need to understand the most amount about how the pcm works
Still more important than the Tweecer would be ...
How the motor will behave when you + or - fuel and spark
When you get started with self tuning and look at your first default file
You can get overwhelmed real quick :Word:
Its no biggie really ... You just start out with some basic, simple stuff
After you get all checked out on how to ...
save a file with your tweecs
upload that file to the pcm
capture data to a file
analyze that file
You got the basics of how to tune your Stang
Then ... The only thing left would be for you to ask the most important Q
W H Y ... would I want to make a change
Allow me to elaborate with a simple example
As a noobie you start off with an OEM file with OEM values ... Right?
Say you got a h/c/i combo that won't idle ... You ask the Q ... Why?
Common Sense Tells You .........
Hardware (combo) is no longer compatible with Software (OEM pcm values)
You ask yourself about the pcm and how it works at idle
For this little example ... we will just deal with 2 parameters
1 Idle value
2 Airflow values
1) The OEM value for idle is 644 rpm
W A Y too low for a combo with those kinds of hot rod parts
threfore
You reason ... Why ... a change needs to be made
Bump it up for less grief and more relief
Make Sense
2) Lets keep it simple here but still reason out ... Why ... Make a change
A little stocker Stang (OEM values in the pcm) .....
It it gonna generate more or less airflow at idle than a h/c/i combo ???
See where I'm going here
Bump up the airflow values by about 20%
and
You'll be in the ballpark
Again ... Make Sense
Thats kinda how the thought process goes for me
then again
Friends tell me I peep at life through a different kehole than they do
Here is what I think is the best way to relate to .....
Whats going on during different driving conditions
and
What in the world is the pcm doing during those conditions
I call it ... 30 seconds of focused data gathering
You do one and ONLY ONE thing at a time while datalogging
Quick Example and this novel will be done
Say you wanna learn a bit about ... LOAD
You do 3, 4, or maybe 5, 30 second datalogs
All conditions are exactly the same ... You know ...
like 3rd gear ... almost closed throttle ... like 15 mph ... level road
You accelerate from 15 mph to say 45 mph
Only thing different on the various runs is how you accelerate
Run #1 is like you got an egg between your foot and the skinny pedal
Run #5 is WOT
Runs 2-4 would be in between the two extremes
See where we are going here
You look at the load values in each d log and see how it relates to
throttle position
amount of rpm
closed loop or open loop
and more
HEY ... Look at enough raw data
and
YOU WILL ... start to see how it all comes together
Hope all that junk makes some kind of sense
but
If I was not all that clear some where
Ask ... and I'll try to clarify
Grady
You got it
A little common sense goes a L O N G way
I didn't say it above ... but ... It is kinda obvious
Tweecer is nothing but an interface to allow you access to the pcm
to change its OEM values
You should be able to be comfortable with its software in just
a few short hours
Now ... that other stuff we talked about ...
That might take you a day or two longer
Grady