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Thread: 'New' Guy In SoCal With Hot Rod Build

  1. #1

    Default 'New' Guy In SoCal With Hot Rod Build

    At age 73, with 50 years as a professional mechanic. I find it ironic to call myself 'new', but this Forum is new to me, as is much of the recent high performance technology. I'm building a Deuce Roadster hot rod with a big block Ford ('71 Lincoln 429 reborn as a 502). Street/strip/show car with a Richmond 5-speed transmission & Currie 9-inch 3:25 rear. Hydraulic roller cam, TFS heads, 12:1 compression, E85 fuel, Aeromotive A1000 fuel system and tunnel ram with an Enderle Bugcatcher for air management. No blower/turbo. I've acquired the Holley HP EFI system for my port injection system and I'm looking for some help choosing ignition system parts. The easy way forward would probably be the MSD 2379 Dual Sync distributor & 6AL-2 control, but what if I went with a crank trigger system as Holley recommends? Well, the crank trigger distributors come with a 'large cap' and that won't fit with my tunnel ram (I tried). So I have to use a small cap distributor (?) with a cam position sensor (?). Can I just use the cam position sensor in the Dual Sync for the injectors and the crank trigger for the ignition trigger input? OR? I would really appreciate any suggestions this forum might have! (I'm not getting any younger and nearing the end of this build that started in 1996!)

  2. #2
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    Quote Originally Posted by stevesgarage View Post
    Can I just use the cam position sensor in the Dual Sync for the injectors and the crank trigger for the ignition trigger input?
    Yes. The crank trigger is for the EFI & ignition system, and the cam sync is for sequential fuel injection.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: Dominator MPFI & DIS, A/C, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/X-pipe/shorty headers, 100HP progressive dry direct-port NOS, 160A 3G alternator, Optima Red battery, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, 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

    Default

    Okay, thanks for the quick reply! I wasn't sure that I could use just ONE of the signals from the Dual Sync distributor. Haven't had one in my hands, so I just wanted to make sure.

  4. #4
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    Quote Originally Posted by stevesgarage View Post
    Okay, thanks for the quick reply!
    You're welcome.

    I wasn't sure that I could use just ONE of the signals from the Dual Sync distributor.
    Yes, that's why Holley offers a blank cap, so it can be used as a cam sync only.

    Originally Posted by Danny Cabral
    FYI:
    Holley EFI now sells their own Dual Sync Hall-Effect distributors (LINK).
    They're a small cap design, "plug & play" with Holley EFI, and no need for a modified Firing Order.
    The crank & cam sensor signals also provide sequential injection capability (MPFI applications).
    It's "plug & play" (into the 10-pin ignition connector on the EFI Main Harness) and requires a CD
    ignition box (Instructions). The MSD 6201 Digital 6A CDI box & 8253 HVC-2 coil are a great match.
    The MSD CD ignition box is wired as shown in the Holley EFI Wiring Manual:
    http://documents.holley.com/techlibr...10555rev17.pdf (Holley EFI Wiring Manual - Figure 11, Page 20)
    https://www.youtube.com/watch?v=AM7r-DauCak (Holley EFI Dual Sync Distributor - YouTube Tech Video)
    A blank cap (LINK) is available, if the user decides to convert to Coil-Near-Plug/DIS later (no CDI box).
    Of course, this component can also be used as a crank and/or cam sync/oil pump drive unit.

    The Custom Ignition Parameters (in System Parameters) for the Holley EFI Dual Sync Distributor:
    Ignition Type ............. ― "Custom"
    Crank Sensor Type ..... ― "1 Pulse/Fire"
    Sensor Type .............. ― "Digital Falling"
    Inductive Delay .......... ― "100.0 usec" ( Synchronization info, adjusted per application.)
    Ignition Reference Angle ― "50°" ( Inherent rotor-phasing of this unit.)
    Cam Sensor Type ........ ― "Single Pulse" ( "Not Used" for TBI, unless CNP ignition.)
    Sensor Type .............. ― "Digital Falling"
    Output Setup Type ..... ― "Points Output" ( CDI box ground trigger.)
    Dwell Time ................. ― "2.0 msec" ( Do not set this to 1.5 msec!)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: Dominator MPFI & DIS, A/C, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/X-pipe/shorty headers, 100HP progressive dry direct-port NOS, 160A 3G alternator, Optima Red battery, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, 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.

  5. #5

    Default Dual Sync Distributor

    Is the MSD Dual Sync 'plug & play' with the Holley HP EFI the same as the Holley distributor? Are the rotor & cap interchangeable?

  6. #6
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    Quote Originally Posted by stevesgarage View Post
    Is the MSD Dual Sync 'plug & play' with the Holley HP EFI the same as the Holley distributor?
    The MSD 2379 Dual Sync distributor? If so, yes.

    Are the rotor & cap interchangeable?
    Contact MSD Tech Service (LINK).
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: Dominator MPFI & DIS, A/C, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/X-pipe/shorty headers, 100HP progressive dry direct-port NOS, 160A 3G alternator, Optima Red battery, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, 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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