The hei system controls the primary current in the ignition to time the spark via a magnetic signal of the pick up coil when the teeth are aligned, the magnetic field increases, which induces a electric current through the pick up coil windings. I am thinking i need to run a 14 gauge wire from back of starter switch to hei coil + but the question is which lead to hook up to and am i thinking corect please respond to [email protected] if you have an answer for me on the proper wiring of an hei distributor on a 57 chevy. So your ready to wire up an hei heres the summary in a nutshell replace the resistance wire that ran to your points system, from the fuseblock, with a 12guage wire (pink insulated if you want to remain factory compliant) and hook it up to the hei bat terminal. It basically just a voltage step-up (transformer) when you put the box on it sees power only for very brief periods of time when the capacitors in the box fire and throw a big jolt of juice at it rest of the time it's just sitting there, totally un-energized.
This harness is designed to simplify the installation of an msd 6 series ignition control to a gm hei distributor that uses a 5-pin or 7-pin module. If i use the 8401 cover on my hei stock dist to hook up an external coil along with my 6t box will the ground wire that is in the middle terminal as shown in the wiring diagram be left in that position or will it be removed. Yes, to start with i would hook up vacuum advance to full time vacuum and see how it idles and runs you may have to go to ported vacuum (above the throttle blade) if the idle won't set steady or it doesn't run like you think it should. Here is a simple drawing that shows how i typically wire gm engines with electronic ignition (hei) distributors and the 70s/80s era internally regulated alternators.
The fast chevrolet efi hei distributor provides the customer with a high performance, efi-friendly and more accurate ignition option than an oem system. Hei conversions finding an hei distributor there are a couple of choices here, new or used in addition, here are a few things to note: '75 to '79 ('75 to '85 canadian) used 4-pin modules. How do i hook up a tachomter to gm hei distribter thats has a internal coil on a 85 chevy c10 truck 305 v8 - answered by a verified chevy mechanic i have a 1972 chevy c10 pick up 2wd it has a 350 with hei ignition it has a four barrel rochester carb it has new plugs and wires. Gray hei ignition coil repair connector gm 1985 up $545 $399 add to compare add to wishlist add to cart set of gm hei distributor and tachometer repair pigtail connectors $999 click the button below to add the gm hei distributor to tachometer connector to your wish list. This is a image galleries about hook up trailer wiring diagram chevy truckyou can also find other images like wiring diagram, parts diagram, replacement parts, electrical diagram, repair manuals, engine diagram, engine scheme, wiring harness, fuse box, vacuum diagram, timing belt, timing chain, brakes diagram, transmission diagram, and engine problems.
General motors hei ignition control with megasquirt-ii using other vr sensors with gm hei modules to hook up another vr sensor distributor to megasquirt-ii, there are many more parameters to set up and tune to use the gm hei effectively, see the: ms-ii configuration page. On a 1998 chevy cavalier what color wire do i hook the green off my tach to the green wire from the tach goes to the negative side of the coil or if its an hei distributor it will connect to the left of the hot wire going to the distributor. Make up a 12 gauge wire with an in-line 20 amp fuse connect that wire from the ignition switch directly to the bat position on the hei you do not have to connect anything to the tach position, but if you want a tach, most semi-modern tachs (like my sun super tach iii) work just fine when connected to the tach output.
Then hook all your other wires up per factory or whatever the tach directions tell you to do i found this in my search: if you have an hei distributor with a tach output you can use the tach output from the hei distributor. Instructions for installation of summit hei distributors equipped with an adjustable vacuum advance kit 1 remove the air cleaner if necessary to gain access to the base of the distributor. I am restoring a 72 chevy truck, i am having trouble hooking up my stock tachometer to a new hei distributor every time i connect the tach the truck will not start when i disconnect it starts up just fine. Spark it up: how to convert a ford or mopar distributor to gm hei that way if the msd box fails, it would only require a few simple wiring connections to hook up the hei module we rigged a simple bench test to show how this idea works with a ford distributor we wired the hei module and coil according to the schematic, grounded the steel.
Coil on the coil-in-cap gm hei, the coil is located on top of the distributor between the plug wire towers under a plastic cover stock, it's capable of about 35,000 volts and so-so total spark energy. Hook up an advance timing light by hooking the carbon connection over the no 1 cylinder wire and hook the positive and negative clips to the battery if there is a vacuum advance, pull the hose off the vacuum source and plug the leak. Written by: damon nickles & mike ervin the hei is a great distributor for a street or street/strip car its simple, easy to tune, and plenty powerful to light off any naturally aspirated engine up to 7000 rpm if properly equipped. Have a debate as to which vacuum source to hook up an hei distributor to: ported or full time vacuum i always believed it was ported but a couple of friends say it should be full time car is street driven mild small block.