Giving you tuning guys a heads up...

Discussion in '94-95 Talk' started by StangGT1995, Sep 23, 2007.

  1. StangGT1995 have car, will race....wait, it doesn't run

    Member Since:
    Oct 23, 2004
    Message Count:
    5,294
    Likes Received:
    4
    Trophy Points:
    88
    I'm going to be pestering the hell out of you soon. My TwEECer RT is on the way. :banana:
  2. final5-0 New Member

    Member Since:
    Apr 7, 2003
    Message Count:
    6,803
    Likes Received:
    0
    Trophy Points:
    0
    :rlaugh: 1-800 Call Wes :rlaugh:

    Grady
  3. Stanger007 Founding Member

    Member Since:
    Sep 26, 2001
    Message Count:
    2,029
    Likes Received:
    0
    Trophy Points:
    0
    "BEEEP BEEEEEEP BEEEEEEEEEEP I'm sorry the number you dialed has been disconnected"


    LOL.

    Welcome to the fold. What size injectors are ya running?

    Wes
  4. StangGT1995 have car, will race....wait, it doesn't run

    Member Since:
    Oct 23, 2004
    Message Count:
    5,294
    Likes Received:
    4
    Trophy Points:
    88
    Ha, I'm still running a completely stock fuel system with the mods in my sig. Some 30lb injectors, a 190 or 255 pump, and 90mm LMAF are on the agenda for my next paycheck.
  5. Stanger007 Founding Member

    Member Since:
    Sep 26, 2001
    Message Count:
    2,029
    Likes Received:
    0
    Trophy Points:
    0
    Man your car sounds nearly identical to sage2k's car. We put a lightning meter on his car this weekend - the stock maf was pegged at 5v around 4400rpm. :)

    I like the 255 pump.

    I agree on going at least 30lb on the injectors - his 24s are pretty much ragged edge. :)

    If time allows, we're going to drop my spare wideband on his car next weekend and nail down the WOT tuning with the new MAF, hit me up for a good MAF transfer for it - there are quite a few floating around.

    Wes
  6. StangGT1995 have car, will race....wait, it doesn't run

    Member Since:
    Oct 23, 2004
    Message Count:
    5,294
    Likes Received:
    4
    Trophy Points:
    88
    Well, that should hopefully make the learning curve a little better, since you're already nailing down the tune on a similar setup. I still need to pick up a wideband myself. I just need money :D
  7. Blackened302 New Member

    Member Since:
    Jul 21, 2005
    Message Count:
    1,477
    Likes Received:
    0
    Trophy Points:
    0
    very cool, man--enjoy it!
  8. StangGT1995 have car, will race....wait, it doesn't run

    Member Since:
    Oct 23, 2004
    Message Count:
    5,294
    Likes Received:
    4
    Trophy Points:
    88
    What did I get myself into here? This thing is all Greek to me! And OMG was the computer a PITA to put back into the kick panel!
  9. Stanger007 Founding Member

    Member Since:
    Sep 26, 2001
    Message Count:
    2,029
    Likes Received:
    0
    Trophy Points:
    0
    haha the dang PCM.

    I find it easiest to put the PCM back in the white bracket (or as far as it will go w/ the twEECer) and THEN connecting the harness to it.

    Do it enough times and you'll have it down to a few minute job to r/r it. :-D

    So what are your first twEECs???

    Wes
  10. StangGT1995 have car, will race....wait, it doesn't run

    Member Since:
    Oct 23, 2004
    Message Count:
    5,294
    Likes Received:
    4
    Trophy Points:
    88
    I took the white bracket out. It just would not go in otherwise. I tried prying it, forcing it, and gave up. It's got a rag wedged in behind it so it's not bouncing around. I'll come up with a better system later... lol

    I really haven't done anything yet. Loaded up a J4J1 tune, and used the injector slopes from the T4M0 tune because I'm still running my factory 19lb injectors. Took it for a drive and it actually seems to have less power than it did prior to the tune, although it does idle a little more smoothly now. I need to read more before I try to do anything else, and also get some sort of power inverter, so my laptop will stay working longer, and I don't need to run an extension cord to the car for AC power.
  11. final5-0 New Member

    Member Since:
    Apr 7, 2003
    Message Count:
    6,803
    Likes Received:
    0
    Trophy Points:
    0
    Matt

    I would also load in the offsets from the t4m0 for those 19's :)

    Since you now have slope values that do not equal .........
    You are gonna have to play with things to find a breakpoint that works
    well for your combo.

    For a starting point.....
    You may wanna just load in the t4m0 bp value :shrug:

    btw ... All this inj stuff is explained in EA

    Yes ... a small loss of power is usually a by product of moving to the j4j1 :(
    The spark is less aggressive on the j4j1 than the t4m0
    You can easily recover the power with a bit of spark tweecing :)

    Looks like you are starting to have some fun :nice:

    Don't try to learn all this stuff in one day :Word:

    It took me a whole week :rlaugh:

    Grady
  12. StangGT1995 have car, will race....wait, it doesn't run

    Member Since:
    Oct 23, 2004
    Message Count:
    5,294
    Likes Received:
    4
    Trophy Points:
    88
    Grady, for the first time ever, since I've basically avoided the tuning forums in the way of trying to offer any advice, I have no idea what you just said to me. :rlaugh:

    I need to do some more reading.
  13. Stanger007 Founding Member

    Member Since:
    Sep 26, 2001
    Message Count:
    2,029
    Likes Received:
    0
    Trophy Points:
    0
    When you copy over the injectors, be sure to copy over:

    Scalar: Injector High Slope
    Scalar: Injector Low Slope
    Scalar: Injector Breakpoint
    Scalar: Injector Minimum Pulsewidth
    Function: Injector Offset vs Battery Voltage
    Table: Injector Timing

    The MAF transfer is a tad different, as is the High Speed Fuel Enrichment.

    If you download a free copy of BinaryEditor, you can do a compare on T4M0 to J4J1 to see what exactly is different -- http://eecanalyzer.webhop.net/

    Good luck!

    Wes
  14. Stanger007 Founding Member

    Member Since:
    Sep 26, 2001
    Message Count:
    2,029
    Likes Received:
    0
    Trophy Points:
    0
    PM me your email address or hit me up on IM and I'll send you some spark tables that should work well for your setup.

    Wes
  15. final5-0 New Member

    Member Since:
    Apr 7, 2003
    Message Count:
    6,803
    Likes Received:
    0
    Trophy Points:
    0
    Matt

    I'm shocked :eek:
    and
    Deeply hurt :(

    I thought everybody reads every post I put up :rlaugh:
    especially
    In the tuning forum :rlaugh: :rlaugh: :rlaugh:

    Allow me to elaborate :D

    The offsets we talked about are a function named .......
    Injector Offset vs Battery Voltage

    The breakpoint is a scalar named ......
    fuel_injector_breakpoint

    Injector tuning is accomplished V E R Y differently in these two pcm's ;)

    You see the slope values being equal in the j4j1 which some have
    said makes the breakpoint null and void

    You see the offset values being about 200% greater on the t4m0

    We need to bring up these things due to you using inj's other than
    the default 24's you find in the j4j1 :)

    IMHO ... if you are gonna do unequal slope values with the 19's ...
    You're gonna have to then deal with a breakpoint
    and
    You should start your injector tuning with the 19lb inj offset value

    btw ... DO NOT try to take info to heart about injector tuning from
    any Fox threads you might find on the forums as they are totally in a
    different dimension than our pcm :Word:

    Actually Matt ... I'd focus on CBAZA threads only about ALL parameters
    in the pcm so you don't get misled by info that does not work
    with your 94-95 pcm ;)

    We have talked about this subject over the years here so you should
    be able to find some info and details on injector tuning in the tuning
    or tech forms.

    Some of that stuff goes way back :crazy:
    before they even started the tuning forum :)
    and for that stuff
    You'll find it of course ... in the Tech Forum

    Hope this makes it more easy for you to relate :shrug:
    and
    find all the details :nice:

    Grady

Share This Page