planning: parts/tweecer

[Hef5.0weisen]

I've been picking up some parts latley. Already have a Kenne Bell; performer heads, rockers, LMAF, 42 lber's are in the mail. Tmoss lower, just gotta e-mail him back and it'll be on the way. Small stuff is in the summit shopping cart, just gotta order it. Junkyarding soon for a Fox throttle body swap.

Saved up for a few years, so I've been having fun shopping....now to make it all work together I would like to use a tweecer. I did a bunch of reading on these things over the years but have no hands on experience with one. Got the Ford fuel injection book, cruise the Yahoo tweecer site, numerous searches on here blah blah blah....

I'm planning on installing the heads and intake first. Leave the stock MAF/ injectors in place and making sure everything is mechanically sound. Then the Fox t-body swap, again making sure it all works as advertised. Then the Maf and injectors and ditch the KB FMU. Of course this would be tweecer time.

So....from the bits and pieces I've read, is it as easy as setting the "injector slope" and "maf transfer"...just to get it started and running. Granted it wouldn't be optimal, but enough to move from point A to B? What else would need to be "tweeced" just to get the thing moving?

FYI, I do have alternate trasportation.(Harley, Xterra) From reading previous posts some will mention doing a cam while its all apart. My thoughts...leave the stocker in there till the previous mentioned mods are smoothed out and running fine. (I don't mind doing the wrenching, cost of gaskets etc). That comes form reading on here about the cams and computer issues....recurring theme here, do it in steps so I'm not chasing too many gremlins.

Dyno tune is out of the question due to my geographic location...middle of nowhere New Mexico, nothing like that exists within 250 miles of me (not even a track). Haven't ruled out something like Lasota thru the mail, but I'm leaning toward the DIY method

Let me know what you think....any additional tweecer info (links, guides, etc. is welcomed) ........and I'll be painting it and adding some suspension stuff as well.

Thanks,
Hef

 

[94-302-vert]

You have more restraint than me... I could never have parts pile up like that on me...

 

[final5-0]

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

 

[Hef5.0weisen]

Final-0
My big take away from that...get the tweecer RT, hands down.

I get what you're laying down, if you do something, do it for a reason.

I'm sure I'll be in touch when this all comes together...

 

[final5-0]

Final-0
My big take away from that...get the tweecer RT, hands down.

I get what you're laying down, if you do something, do it for a reason.

I'm sure I'll be in touch when this all comes together...

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

 

[deric89460]

If you buy the Tweecer R/T besides a labtop do I need anything else to run the Tweecer. (ie other parts) I have a 94 5.0 with a 5-speed stock car?