tweecer noob

bruinswaa · Feb 25, 2010

I have a 95 mustang gt and currently am running a mostly stock j4j1 tune with, afr165 heads crane 2020 cam cobra intake 24 lb injectors stock maf. also have a 1" spacer phenolic because i had to make room for taller valve covers. Im very new to this tuning all ive really messed with is the scalars because its all im really comfortable with right now. i have a tweecer r/t with binary editor and eec analyzer. I found a tune on tunexchange J4J1 DIRTYDIRTYRACING.COM - [tunexchange: It's a bird... it's a plane... it's TUNEXCHANGE!!!] and it seemed pretty close to what i have. i just wanted some opinions on what some people might think about this tune. Also with my 1" spacer it adds volume to my intake wouldnt that have to be accounted for? I plan on getting a wb o2 sensor

What i want to get good at this summer is the datalogging aspect of it. I dont really know where to start. im able to do a datalog but dont know how to make heads or tails. How do i make my own maf curve? im not good at doing anything wiht the tables or functions. I just need some help getting started anything anyone can do to help would be appreciated

BlackVert · Feb 25, 2010

here is a pretty good place to start ....

http://www.stangnet.com/mustang-forums/610658-tweecer-tuning-manual.html

2002BLGT · Feb 26, 2010

bruinswaa said:
I have a 95 mustang gt and currently am running a mostly stock j4j1 tune with, afr165 heads crane 2020 cam cobra intake 24 lb injectors stock maf. also have a 1" spacer phenolic because i had to make room for taller valve covers. Im very new to this tuning all ive really messed with is the scalars because its all im really comfortable with right now. i have a tweecer r/t with binary editor and eec analyzer. I found a tune on tunexchange J4J1 DIRTYDIRTYRACING.COM - [tunexchange: It's a bird... it's a plane... it's TUNEXCHANGE!!!] and it seemed pretty close to what i have. i just wanted some opinions on what some people might think about this tune. Also with my 1" spacer it adds volume to my intake wouldnt that have to be accounted for? I plan on getting a wb o2 sensor

What i want to get good at this summer is the datalogging aspect of it. I dont really know where to start. im able to do a datalog but dont know how to make heads or tails. How do i make my own maf curve? im not good at doing anything wiht the tables or functions. I just need some help getting started anything anyone can do to help would be appreciated

If you are running the stock MAF you should not have to adjust it much

final5-0 · Feb 28, 2010

Search is your friend

I don't have a lot of time today
but
I've given the same info before several times

Did a quick search using ... datalogging

Here are a couple of getting started threads

Hope it helps

http://www.stangnet.com/mustang-forums/778660-new-tweecer-guy.html?highlight=datalogging

http://www.stangnet.com/mustang-for...-has-few-questions.html?highlight=datalogging

Grady

bruinswaa · Mar 3, 2010

Ok so once i some datalogs what do i do with them exactly? i have eec analyzer. do i write them to the tweecer? i dont understand

2002BLGT · Mar 3, 2010

bruinswaa said:
Ok so once i some datalogs what do i do with them exactly? i have eec analyzer. do i write them to the tweecer? i dont understand

Do you have a wideband ?

bruinswaa · Mar 4, 2010

not yet but i could if its necessary with the combo ive got. also what do you think of those idle air control restrictor plates?? dashpot seems to be an issue with this car

bruinswaa · Mar 4, 2010

adaptive learning

also with that j4j1 from tune exchange adaptive learning tables are all the number 4 . i was told that it disables adaptive learning is that a good idea?

final5-0 · Mar 4, 2010

bruinswaa said:
also with that j4j1 from tune exchange adaptive learning tables are all the number 4 . i was told that it disables adaptive learning is that a good idea?

Adaptive Learning and Closed Loop is your friend :Word:

You don't wanna disable that stuff

What you can do is .............
use it to fine tune things when you get all the major things close

You use KAMRF and LAMBSE values to get the most difficult part ...
which is the driving around town and cruise around town during
light load thing ... of the tune close

You will find when you are close ... the adaptive will do a very small
amount of + or - to things when you are in Closed Loop

You just need to spend some time doing basic research about how
the pcm controls things during Closed Loop

Grady

final5-0 · Mar 5, 2010

Here is a bit more info for you

I will hit the high spots but you will need to spend a little time on the
tuning sites to get the basics cause if you depend upon using a tune
someone else did you won't ever get it like it needs to be

You might get in the ball park but it won't be as good as it could be

You really don't need a wb for closed loop tuning cause you can look
at karmf and lambse

Open Loop or WOT ... Yes ... You really need a wb for that part of
the tune :Word:

Here we go ... Closed Loop means the pcm is using output from O2's

KAMRF

A value of 1.00 means the Adaptive Strategy is not adding or pulling
fuel

>1.00 means you are too lean and adaptive is adding fuel

<1.00 is of course just the opposite

LAMBSE

This is N O T your fuel ratio

It is what the pcm is commanding at that particular moment

Speaking of fuel ratio

14.7 is what peeps call stoic and for cruising and light load
driving conditions ... most folk consider that value just about
what you need

This is a relationship of air to fuel
or
14.7 parts of air to 1.00 part of fuel

Therefore ... 16.00 to 1.00 would be leaner
and
12.00 to 1.00 would be fatter

Here is how lambse will relate to kamrf

Say you see kamrf values > 1.00 which is adaptive adding fuel

You should expect to see lambse values below 14.7 which is
the pcm commanding a fatter ratio

See how the two go together

In a nutshell ... you adjust high and low injector values and other
fuel related values until you get the kamrf values hugging prretty
close to the 1.00 point which means the adaptive is not working
very much because you have gotten the tune just about right

Hope that helps you to see just a bit farther into all this stuff

Grady

bruinswaa · Mar 6, 2010

Sad face

yeah that makes sense to me. i understand alot of the basic stuff like that what im more confused about now is how to do a datalog and make changes from that. I have BE and EEC analyzer so i choose my payloads and then do my datalog. Now i dont know what to do with it after that. I see that theres bunch of scalars to set up in eec analyzer such as cam maf, tire/wheel size etc.
Is this somthing i should have set up to exactly what my car is? I see the dropdown menu for the maf and dont see a j4j1 what do i do there? So i should keep adaptive to the stock settings and then when i get CL good i should disable it? Sorry for the confusion

final5-0 · Mar 6, 2010

bruinswaa said:
yeah that makes sense to me. i understand alot of the basic stuff like that what im more confused about now is how to do a datalog and make changes from that. I have BE and EEC analyzer so i choose my payloads and then do my datalog. Now i dont know what to do with it after that. I see that theres bunch of scalars to set up in eec analyzer such as cam maf, tire/wheel size etc.
Is this somthing i should have set up to exactly what my car is? I see the dropdown menu for the maf and dont see a j4j1 what do i do there? So i should keep adaptive to the stock settings and then when i get CL good i should disable it? Sorry for the confusion

Did you read the thread where we talked about doing 30 second dl's?

Grady

bruinswaa · Mar 6, 2010

no i dont think so where can i find that thread? I know how to set up datalogs and do datalogs. i just dont know the procedure after ive done them through eec analyzer. do i need to write the datalog to the tweecer?

final5-0 · Mar 6, 2010

Look at my first post in this thread

See where I searched up a couple of links to threads for you

Grady

bruinswaa · Mar 13, 2010

alright the weather is getting nice here so i can start to think about tuning my car. So say i run a few CL datalogs this is where i dont understand what to do. First of all in eec analyzer there is a MAF section and i dont see mine in the list. I have a j4j1 tune stock maf what do i do for that? Now once i have a few of these 30 second datalogs i open up eec analyzer and do what? Where is the part where it recommends changes? I probably dont have to mess with much anyways i just want to see.

Ari Tepponen · Jun 29, 2025

BlackVert said:
here is a pretty good place to start ....

http://www.stangnet.com/mustang-forums/610658-tweecer-tuning-manual.html

Hi!

I know that this thread is old but still I was wandering if You or somebody else might still have that tweecer manual laying somewhere around? I'm new to this and would apricate any help available.

General karthief · Jun 29, 2025

Ari Tepponen said:
Hi!

I know that this thread is old but still I was wandering if You or somebody else might still have that tweecer manual laying somewhere around? I'm new to this and would apricate any help available.

None of these members been around for 5 or more years, have you looked around the 'tuning' threads?

Ari Tepponen · Jun 30, 2025

General karthief said:
None of these members been around for 5 or more years, have you looked around the 'tuning' threads?

Thanks' for info! I haven't look tuning threads yet since google pointed this first to me so there next

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wonder how much it would cost to ship you a pair

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