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Thread: High Horsepower CNP Kit

  1. #1

    Default High Horsepower CNP Kit

    Hi. I'm using the Holley High Horsepower CNP V8 Kit P/N 556-128. This Kit has its own power & ground leads to support the higher amperage requirement.
    When using the Universal CNP Ignition Harness P/N 558-307, can I remove the below leads from the harness? These seem redundant since I'm using the High Horsepower CNP Kit. Thanks, Eric

    EVEN
    Ground A
    B14E
    Relay +12V

    ODD
    Ground A
    B14E
    Relay +12V

  2. #2
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    Default

    Quote Originally Posted by emueller View Post
    When using the Universal CNP Ignition Harness P/N 558-307, can I remove the below leads from the harness? These seem redundant since I'm using the High Horsepower CNP Kit.
    Correct. The upgraded Holley 558-318 CNP coil sub-harness (or Holley 556-128 CNP V8 Kit) has it's own 12 AWG red & black power wires that bypass the Holley 558-307 CNP main harness connectors.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #3

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    Wouldn't you need to maintain the coil trigger ground wire (B14E)?
    "Pin B – Coil Trigger Ground (black/white wire) – These can be all tied together and go to Pin B14 (EST Ground Output)." Holley 558-318 CNP Coil Sub-Harness Instructions

  4. #4
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    We're referring to the (loose) 12 AWG red & black main power wires.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  5. #5

    Default

    Thanks Danny, but he asked, "can I remove the below leads from the harness" and included B14E, so wanted to make sure those leads are still required.

  6. #6
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    Connecticut
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    Yes, the Coil Trigger Ground wires are required. All the leads in the Holley 558-318 CNP Coil Sub-Harness are required. In other words, just follow the Holley 556-128 CNP V8 Kit/558-318 CNP Coil Sub-Harness instructions.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

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