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Thread: Sniper EFI tuning on a laptop.

  1. #1

    Default Sniper EFI tuning on a laptop.

    Hi all. First post on here. Recently had the Sniper EFI installed. I want to look at everything on the laptop before even attempting to change anything. I've read a dozen posts and also the Holley advanced tuning program download, but I just want a good video to show me from starting and driving the car, to Logging Data and saving onto SD card, to uploading to Holley software and making changes and then back to SD card to install back into car and have changes applied to ECU. So if anyone has a detailed video or can point form it all, it'd be much appreciated.

  2. #2


    I watched most of the Holley corporate YouTube videos, which are really well done. Then you can search "turbo Camaro Sniper" in YouTube to find the videos by Turbo Camaro. Finally, look up Devin Vanderhoof on YouTube. He has some excellent wiring videos as well as Holley EFI software tips.

    I highly recommend getting the USB to Sniper cable (some kits come with it) so you can upload and download Config Files directly to the ECU and not fool with the SD card for that. You can also make changes real time with the car running and the laptop connected.

  3. #3
    Join Date
    Dec 2009

    Default (Holley Sniper EFI Help Manual - EFI Software, Tuning & Datalogging)
    Originally Posted by Danny Cabral
    The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software (LINK), Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). The Target Air/Fuel Ratio Table & Base Timing Table can then be properly configured & tuned for any engine. I always suggest taking notes of your current distributor's ignition timing specs/curves beforehand, and then program the Base Timing Table accordingly. (Sniper EFI Software & Holley 558-443 CAN/USB Dongle) (Sniper EFI Optional Comm/Data Cable Accessories)
    May God's grace bless you in the Lord Jesus Christ.
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  4. #4


    Thanks heaps guys. Until I've done approximately 400 Kms and let the ECU Learn, I'll do my homework before addressing any issues. I've read a lot of posts, and Danny you seem to have more knowledge than Holley's whole work force. For future posts with issues I want to address and ask advice on, do I just make a new post or just keep this one going? Thanks again.

  5. #5

    Default Datalog & Config Files for some advice.

    Hi again. I would like some help and advice on my Sniper setup. Car runs so different so it's hard to tell what's good as it feels so good. But I understand that it'll take time to Learn and advice on tune is appreciated. To my understanding, the Sniper EFI software will auto-save files on SD card when it's plugged in to the PC? I'm confident now in the process of taking the SD from car (upload ECU file to SD card) and uploading to software for tuning, changes and what not. Then saving and back to car and upload back to ECU. I have one datalog that will not upload as zip file. It's 3.9 MB is it too big? And my Config File is uploadable. Would I be able to have someone take a look at it and see how it's all looking. Thanks in advance. WEZ
    Attached Files Attached Files

  6. #6

    Default Screenshot of error.

    This is the error that comes up. Is there something I'm doing wrong, or is the file too large? Cheers
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  7. #7


    I'm not sure what you mean “software will auto-save files to the SD card when plugged into the PC”. When the Sniper is plugged into the PC, the handheld is not connected (unless you buy the new splitter from So if you mean the SD card in the handheld, no it won't save. When the PC is connected, everything saves directly to the PC hard drive.

  8. #8


    I mean when the SD card is inside the PC and you're using the Sniper EFI software, and when you save a file it automatically saves it back to the SD card. Or do I need to manually save it back to SD card. Sorry as I'm not real computer savvy, but can get by under instruction. I guess in my head, it's like taking it from the car. First I need to download from ECU and when I put back in upload to ECU. Thanks in advance. Wez

  9. #9


    I believe the default location when saving a Config File from the PC software is on the C:Drive in a folder in Documents>Holley>Sniper>Config Files>Custom Cals. But certainly if you have the SD card installed you can "Save As" and navigate to the card.

  10. #10


    OK cool. Thanks for that. I did notice that when the SD was in the PC, it auto saved to it as it's where I accessed it from. But for future reference, I think I'll use the Holley folder that auto populated in my docs. Cheers again. Wez

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