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Thread: V5 Upgrade Help

  1. #1

    Default V5 Upgrade Help

    Is it worth it to upgrade from V4 to V5? I understand there is traction management that would be nice. I was told to be cautious because when I upgrade it will lose all my tunes. Is this true? Is there a way to convert or save the tunes from V4? What do I need to do to upgrade besides download the EFI software? Sorry, this is still pretty new to me. Thank you for any help or information.

  2. #2
    Join Date
    Dec 2009


    Read the V5 EFI Software Update Overview, and decide if you want/need the new features: (Holley EFI V5 Software/Firmware Update Overview)

    Your Global File is in the "Documents", "Holley", "HEFI V4", "Global Files" folder (.hefi file). You can save it to the computer's Desktop screen to ensure you don't lose it when updating the EFI software or ECU firmware. Anytime the ECU firmware is updated, ensure the current Global File is saved somewhere, since it will be erased from the ECU. The EFI (laptop) software, ECU firmware & touchscreen unit (if applicable) must all be V4/V5 compatible (LINK).

    I always keep a recent copy of my Global File in an email. You can also keep a copy of it on your computer's Desktop screen. Others keep a copy of it on a USB flash drive or on the 3.5" touchscreen's SD card. The Digital Dash & 3.5" TSLCD can retrieve your Global File from the ECU. (Holley EFI 553-106 Digital Dash Instruction Manual - "Global Config", Page 33 & 34) (Holley EFI 553-108 3.5" TSLCD Instruction Manual - "ECU Globals", Page 31)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, FPP aluminum driveshaft, FPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & MT 245/45R17 tires.

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