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Thread: Questions about installing GM HEI Distributor

  1. #1
    Join Date
    Feb 2014
    Location
    Northern Ohio
    Posts
    27

    Default Questions about installing GM HEI Distributor

    Hi, I've been running my Terminator EFI system without timing control since installing back in 2014 and decided to take the leap into having timing control setup done. I have the parts to make the switch, but before I get to far into this I've been reading all of the posts concerning doing this. Should I bring my old distributor up to TDC before pulling? The optional harness for the small cap HEI, 558-304 from Holley, has the coil to distributor harness included, but I'm a little confused as the diagram in option 3 of the install manual shows the white and red wire going to the coil, but the harness only has the white wire loose, the red is pinned into main connector for the main wire harness. Do I not have to worry about the red wire shown in diagram going to the coil. Do I only connect the white? Is the red wire getting it's power from the main harness? Do I still hook my factory tach to the negative side of the coil and since there are two plugs on the coil, which plug do I tap into or does it matter? I know I will have more questions as I go and I hope you bear with me as try & learn. Thanks in advance for any input and advice.

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    23,499

    Default

    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.

  3. #3
    Join Date
    Feb 2014
    Location
    Northern Ohio
    Posts
    27

    Default

    Thank you Danny. Page 12 showing the option 3 wiring, shows what I was concerned about, my manual is different so this one is the most current diagram. So, I figure I'll be tapping into the white wire to hook my factory tach and shift light that I use, so that's good. I have the factory coil connectors that I bought from RockAuto and they came with pigtails so all I need to do is hook to the pigtails for my connections. I have my old distributor at TDC, so all I need to do is drop the new distributor in place, once I figure what direction the distributor plugs need to face to hook the coil up once I figure where I mount the coil. Thanks again, you're a wealth of knowledge and May God Bless you as well.

  4. #4
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    23,499

    Default

    You're welcome.
    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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