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Thread: TACH Connection

  1. #1

    Default TACH Connection

    With an MSD 6AL and a tach adapter, does the computer tach input connect ahead of the tach adapter or after the adapter?
    Thanks, Bob

  2. #2
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    Quote Originally Posted by OLD BOB View Post
    With an MSD 6AL and a tach adapter, does the computer tach input connect ahead of the tach adapter or after the adapter?
    Is this an ECU controlled timing application, and which distributor are you using?
    I assume "tach adapter" means something like an MSD TACH Adapter for proper tachometer operation in certain applications.
    With that said, the Holley ECU doesn't need the aforementioned tach adapter, so it would connect before the tach adapter.
    http://www.holley.com/data/Products/...R10653rev1.pdf (Holley Terminator EFI Manual - See wiring diagrams in section 13.)
    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/2800 RPM converter, M4602G aluminum driveshaft, FRPP 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 & 245/45R17 tires.

  3. #3

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    Thanks, Danny. That is correct. It is a non-ECU timing controlled MSD distributor with MSD 6AL and the MSD tach adapter. Bob

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    Quote Originally Posted by OLD BOB View Post
    It is a non-ECU timing controlled MSD distributor with MSD 6AL and the MSD tach adapter.
    See Option 2 - "TACH Out" on page 16 of the Terminator EFI Manual:
    http://www.holley.com/data/Products/...R10653rev1.pdf (Holley Terminator EFI Manual)
    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/2800 RPM converter, M4602G aluminum driveshaft, FRPP 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 & 245/45R17 tires.

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