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Thread: new $EE tuning thing!

  1. #796
    Carb and Points! AnArCHy71's Avatar
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    Cool! Thanks man. I noticed your working on the transmission side of the tune. Good Luck! I used the line pressure offset vs TPS tables to get a firmer shift for awhile but like I said,,I'm unsure of a few things still and was worried about hurting the tranns. so went back to stock. I'll be honest with you, I was unsure of any free comp tune online but you know your shit and I definitely see an improvement in the car. I'll keep tweaking just because it's the only way I'll learn more :)
    Last edited by AnArCHy71; 06-26-2016 at 05:19 AM.

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  4. #799
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    Quote Originally Posted by kur4o View Post
    With engine off ignition on do you get any data.

    I never got the chance to test the patch with engine running.
    engine off ignition on I get data but its all zeroes, if i start the engine its still all zeroes and nothing ever changes. E-side datalog didnt save either? Is there another patch for the E-side that I'm missing?

  5. #800
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    Quote Originally Posted by steveo View Post
    i think my next project (aside from eehack) might be trying to get an lt1 ecm running as a standalone with a more traditional distributor input of some kind on a non-lt1 engine. it's a fun ecm but i don't see it used outside of LT1s much, even though spares are plentiful due to so many crashed and ruined b-bodies in the wrecking yards. i'll try to find a distributor and play with it on my bench. might be a long shot but fun to try. not sure if i can use the existing opti inputs or have to use another ad channel
    I would be heavily interested in this. The optispark is one of the LT1's major reliability weakpoints. ive looked into it only barely.

    Seeing as how you have a fondness for antiquated abandoned engine platforms, have you ever considered developing anything for the early Northstar V8 engine? some of the early ones used ACDelco ECU's. Even though it is a Gen III PCM like the LS series engines, it is a platform that has been left out to dry entirely. To my knowledge there is no program that will even simply flash these or even XDFs for TunerPro in existence either. I feel these engines have a lot of potential and the junkyards have lots and lots of them.

    I would be willing to supply some ECU's

  6. #801
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    I tested the line pressure. It sets the "current torque signal pressure" which is an internal "pressure" signal that goes from 0 to 96 with 0 being the lowest transmission line pressure and 96 being the highest line pressure. In my case, the line pressure ranged from 60psi and 205psi. It's a direct application so only the first 37% of the slider is any use since above that it just held maximum pressure. I believe all LT1's use 96 as the highest value so you could reduce the slider to that range. Scaling 0-96 to be 0-100% would be as good a representation of this as any other.

    The force motor current reference and the feedback parameters need to have more decimal places, like 3 would be good.

  7. #802
    LT1 specialist steveo's Avatar
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    I tested the line pressure. It sets the "current torque signal pressure" which is an internal "pressure" signal that goes from 0 to 96 with 0 being the lowest transmission line pressure and 96 being the highest line pressure. In my case, the line pressure ranged from 60psi and 205psi. It's a direct application so only the first 37% of the slider is any use since above that it just held maximum pressure. I believe all LT1's use 96 as the highest value so you could reduce the slider to that range. Scaling 0-96 to be 0-100% would be as good a representation of this as any other.
    i'll go with that

    Quote Originally Posted by lionelhutz View Post
    The force motor current reference and the feedback parameters need to have more decimal places, like 3 would be good.
    i could change that, but i'm not a fan of overly high display precision where it's not necessary, are the measurements really that precise and useful for anything?

    the definition file is CSV and easily edited with your favorite spreadsheet software to change the number of decimal places for any parameter, if you want to try that and see how it goes

    Seeing as how you have a fondness for antiquated abandoned engine platforms, have you ever considered developing anything for the early Northstar V8 engine? some of the early ones used ACDelco ECU's. Even though it is a Gen III PCM like the LS series engines, it is a platform that has been left out to dry entirely. To my knowledge there is no program that will even simply flash these or even XDFs for TunerPro in existence either. I feel these engines have a lot of potential and the junkyards have lots and lots of them.
    not sure, i think i need a whole engine to inspire a project like that

  8. #803
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    The force motor current tables are in mV, so 3 decimal places are needed to display the commanded and actual current values as accurately as the table allows them to be set.

    I was double checking online and there is a GM document that says with the TECH 1 to increase the line pressure by 0.1A increments so I'm wondering if there is another command available to force the current directly??

  9. #804
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    Quote Originally Posted by lionelhutz View Post
    The force motor current tables are in mV, so 3 decimal places are needed to display the commanded and actual current values as accurately as the table allows them to be set.

    I was double checking online and there is a GM document that says with the TECH 1 to increase the line pressure by 0.1A increments so I'm wondering if there is another command available to force the current directly??
    I guess the torque pressure signal is converted to amps through 3d table using trans temp and torque pressure signal.

    I tried to sniff with the OEM tools but can`t simulate PCM in p/n.
    I will get that sooner but it will take some time.

  10. #805
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    Quote Originally Posted by kur4o View Post
    I guess the torque pressure signal is converted to amps through 3d table using trans temp and torque pressure signal.

    I tried to sniff with the OEM tools but can`t simulate PCM in p/n.
    I will get that sooner but it will take some time.

    You got it, it uses the 3-D force motor current table to set the current and then the transmission runs at whatever pressure that current produces. So it's a very good command to see the pressure range you'll get with the force motor current table you have.

  11. #806
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    Quote Originally Posted by steveo View Post
    i think my next project (aside from eehack) might be trying to get an lt1 ecm running as a standalone with a more traditional distributor input of some kind on a non-lt1 engine. it's a fun ecm but i don't see it used outside of LT1s much, even though spares are plentiful due to so many crashed and ruined b-bodies in the wrecking yards. i'll try to find a distributor and play with it on my bench. might be a long shot but fun to try. not sure if i can use the existing opti inputs or have to use another ad channel
    As a corollary, I think lots of guys with LT1's would be really interested in a way to economically drop the optispark in favor of a traditional distributor. There's a few options out there now with Delteq, LTCC, and the various 24x conversions but damn can they get pricey, particularly the 24x conversion since you need a new ecm and tuning suite's that are definitely not free.

  12. #807
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    Also, I'm about to go live with my 4L60e to T56 swap. Since I've made various tweaks to the tune that's currently on the PCM, I'd rather not start over with a factory fresh manual tune if at all possible. Can someone tell me if I can/how to modify my current auto tune to work with the T56?

  13. #808
    LT1 specialist steveo's Avatar
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    new beta is up (mostly to fix lionelhutz's transmission requests)... i did update the decimal precision of a few things but please let me know if i missed anything.

    also added a one-time new pop-up dialog and automatically open settings to assist new users (people upgrading from previous versions will also get the pop-up), this is mostly to direct new users that the vehicle type needs to be set.. but as usual, the majority of users (single serial interface and an f-body) will have the correct defaults.

    http://fbodytech.com/eehack-2/beta/

    things eehack needs from you guys:

    - review of the definition file for any other typos, mistakes, oversights, or things that could be re-labelled to make more sense
    - testing of b-body connection stability, especially with a caddy
    - testing of EGR actuation
    - more ideas for new swag!

    you can help keep the project alive by contributing comments or ideas.

  14. #809
    LT1 specialist steveo's Avatar
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    Quote Originally Posted by Thatdudeorion View Post
    Also, I'm about to go live with my 4L60e to T56 swap. Since I've made various tweaks to the tune that's currently on the PCM, I'd rather not start over with a factory fresh manual tune if at all possible. Can someone tell me if I can/how to modify my current auto tune to work with the T56?
    actually if you just uncheck the 'automatic transmission' box in EEx you'll be up and running enough to drive around.

    you might run into a few error codes that need to be disabled. running a compare manual bin in tunerpro will assist with that.

    other things that need some attention are idle speed (increase it by 200rpm to start with), DFCO, and the weird 'stall saver' timing adder table (but i'd leave the automatic version of that table in place, you'll be fine)

  15. #810
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    OK, so I got my trans swap done, and had been cruising the last week or so on my automatic tune, with no changes. Only issue I had was the speedo, no matter what I did, I couldn't get it to read correctly...So I downloaded the BETA so I can test the EGR I requested, and I got one of your factory calibrations from your repository, put in the calcs for my tire/gear combo, and used the BETA to flash it to my PCM. Speedo is now working correctly (+/- 2 MPH) but the 'dash' tab of EEx isn't displaying any values. The 'Main' tab is displaying everything and it's all updating as it should be, but no love on the 'dash' view, which I use a lot to monitor my inj PW for economy purposes.

    Only other oddity is that for the first time in many flashes with EEx, it said it couldn't communicate with the T-side in the post flash self test, but it seems to have flashed OK...


    Quote Originally Posted by steveo View Post
    actually if you just uncheck the 'automatic transmission' box in EEx you'll be up and running enough to drive around.

    you might run into a few error codes that need to be disabled. running a compare manual bin in tunerpro will assist with that.

    other things that need some attention are idle speed (increase it by 200rpm to start with), DFCO, and the weird 'stall saver' timing adder table (but i'd leave the automatic version of that table in place, you'll be fine)

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