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Thread: LM7 Base Tune for SD

  1. #1
    Carb and Points!
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    LM7 Base Tune for SD

    So, I am hoping to get a little help. I am going to try running a stock LM7 with a Powerglide next season at the track. I would like to run Speed Density in closed loop mode so the car isn't making any adjustments. I have TunerPro and a base stock 2088 OS on a 411 ECM. What changes would you all suggest to get it running before I go get it tuned?

  2. #2
    Fuel Injected!
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    You realize at WOT at the track it will be in Open Loop Power Enrichment mode. Closed loop will be just idling and maybe burnouts depending on the throttle position doing them and staging the car. I would suggest starting with an OS that is for a LM7 with a M5 manual transmission with your powerglide.

  3. #3
    Carb and Points!
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    Quote Originally Posted by 2xls1 View Post
    You realize at WOT at the track it will be in Open Loop Power Enrichment mode. Closed loop will be just idling and maybe burnouts depending on the throttle position doing them and staging the car. I would suggest starting with an OS that is for a LM7 with a M5 manual transmission with your powerglide.
    No, I didn't realize that it would be that way at WOT. I expected it would just run off the tables depending on TPS and MAP readings. Thank you for the input. Any idea where to get that OS and the XDF to go with it? I haven't had much luck finding a manual trans OS anywhere to run on a 411 ECM. The only thing I can find is a 12587603 for a 2004 which is 1MB instead of 512K it looks like.
    Last edited by fish2222; 2 Weeks Ago at 10:11 PM.

  4. #4
    Fuel Injected! sturgillbd's Avatar
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    Here is a 2002 bin that is for a 411 on this site for a 5.3 with a manual trans. http://www.gearhead-efi.com/Fuel-Inj...6&d=1367146707 . It is a 12212156 OS. LRT released a pretty comprehensive XDF file to use with TunerPro for tuning this OS. The XDF is here http://www.gearhead-efi.com/Fuel-Inj...5&d=1547480880 Speed density can be forced by not plugging in a MAF sensor. You do need to use an IAT sensor. There are plenty of threads out there on using speed density with a 411.
    The threads containing these files are here http://www.gearhead-efi.com/Fuel-Inj...rPro-Bin-Files and here http://www.gearhead-efi.com/Fuel-Inj...light=12212156 You may want to research swapping OS's on the 411 with whatever software and flash cable you plan on using and how speed density tuning works. With a stock engine, it may be easier to install the MAF and the tune will be close as is.

    Hope this helps,
    Brian

  5. #5
    Carb and Points!
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    Quote Originally Posted by sturgillbd View Post
    Here is a 2002 bin that is for a 411 on this site for a 5.3 with a manual trans. http://www.gearhead-efi.com/Fuel-Inj...6&d=1367146707 . It is a 12212156 OS. LRT released a pretty comprehensive XDF file to use with TunerPro for tuning this OS. The XDF is here http://www.gearhead-efi.com/Fuel-Inj...5&d=1547480880 Speed density can be forced by not plugging in a MAF sensor. You do need to use an IAT sensor. There are plenty of threads out there on using speed density with a 411.
    The threads containing these files are here http://www.gearhead-efi.com/Fuel-Inj...rPro-Bin-Files and here http://www.gearhead-efi.com/Fuel-Inj...light=12212156 You may want to research swapping OS's on the 411 with whatever software and flash cable you plan on using and how speed density tuning works. With a stock engine, it may be easier to install the MAF and the tune will be close as is.

    Hope this helps,
    Brian
    Thanks. Not sure how I didn't see that one. It'll be a few months before I get this engine transplanted, but I am hoping that I have an ECM that it will run with before I need to start it! I already have swapped an OS with PCM Hammer and and getting familiar with that too. I have read that I need to set a MAF setting to 0, but I need to look back at what setting that is. Thanks for the help!

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