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Thread: Small Block Cam/Crank Triggers

  1. #11
    Join Date
    Dec 2009
    Location
    Connecticut
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    22,906

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    Quote Originally Posted by 350yj View Post
    What's the purpose of an ignition box in this case?
    The Holley Dual Sync Distributor only has two Hall-Effect sensors inside. No ignition module or driver.
    In single coil applications, the CD ignition box is required to fire the coil. The CDI box is the ignition driver.
    In multiple coil applications (DIS/CNP), the CD ignition box is not required. The ECU is the ignition driver.

    Doesn't the ECU perform timing control?
    Yes, it's still an ECU controlled timing application. (See post #2.)
    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.

  2. #12
    Join Date
    Apr 2016
    Location
    Connecticut
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    8

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    OK, that makes more sense to be now. I have seen some conflicting information regarding the Ignition Reference Angle regarding the setup for the Holley Dual Sync distributor. Your post indicates that the Ignition Reference Angle should be set to 60°. Is this assuming the engine was rotated over to 60° BTDC? Is there any advantage to phasing the distributor in at 60° versus 50°? FYI, 50° is what is listed on the instructions with the distributor.
    --
    Kris

  3. #13
    Join Date
    Dec 2009
    Location
    Connecticut
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    22,906

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    Quote Originally Posted by 350yj View Post
    Your post indicates that the Ignition Reference Angle should be set to 60°.
    No, if using the Holley Dual Sync Distributor, the Ignition Reference Angle must be 50°. (The inherent Ignition Reference Angle of this distributor).
    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.

  4. #14
    Join Date
    Apr 2016
    Location
    Connecticut
    Posts
    8

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    OK, thank you Danny.

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