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MSD 8523 Dist with Factory Tach |
Post Reply | Page 123> |
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kenward
AMC Fan Joined: Sep/21/2022 Location: Sanford, FL Status: Offline Points: 3 |
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Posted: Jan/25/2023 at 4:41pm |
Hi Greg,
I've read your post with great interest as I have an MSD 8519 in the box, an MSD Blaster 3 coil 8223, and MSD 8.5mm wires, all ready to install. Several other posts indicate that I also need an MSD 6 or 7 series ignition box. Is that the case and if so, how is that wired into your diagram. I was under the impression/misimpression that the components I have already purchased would do the trick. Please let me know whenever you get a moment. Kind regards, Ken |
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Trans Canada
AMC Apprentice Joined: Mar/23/2015 Location: Dorchester Status: Offline Points: 180 |
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Amc 1970 390. Sorry forgot to mention
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Trans Canada
AMC Apprentice Joined: Mar/23/2015 Location: Dorchester Status: Offline Points: 180 |
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Well I’m reading and have copied Msd / factory Tach wiring diagram that has been drawn
Have a couple question The car I bought a few years ago Had a HEI install distributor I’m putting in a MSD RTR double yellow wire on the (I)sided whoever wired in the past Some one removed these wires They do not exist anymore! So can use the pink and yellow installed on the (I) terminal As they are tied together anyways??? You also show 9 volt resistance wire . - Tach + coil Or did you install a resistor in-line to accomplish this?? Any suggestions welcome :)
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White70JavelinSST
Supporter of TheAMCForum Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867 |
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Someassemblyrqd, I'll try to keep that in mind. This is one of those projects that drags on and on cuz so much other stuff gets in the way. Right now the problem is, it's way too cold in my shop. Anyway the plan is to break in the cam on an engine run stand. So I'll wire it pretty simple, just to start and run. I may try to borrow a suitable tachometer if I can. But I'll try to keep you updated. Armand
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70 Javelin SST, second owner, purchased 1972
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092171michael
AMC Fan Joined: Jan/15/2019 Location: Omaha, NE Status: Offline Points: 16 |
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Holy bajesus, it worked!! Someassemblyrqd, thank you so much for the drawing. And then dumbing down the directions so that I could understand it. I really appreciate it, let me know where to send the check. The car starts and shuts off, and the tach works. I tried to spiffy up the wires a bit. Now, only 2 more problems(maybe 3) I didn't know if I should ad on to this thread, or start a new one. So I'll start a new one, it will be titled, ALT Light Still On. Help me if you can. Thanks again.
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Someassemblyrqd
Supporter of TheAMCForum Joined: Jul/02/2012 Location: Renton, wa Status: Offline Points: 459 |
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Armand - I’d like to hear from you on your engine start/run results by you plugging in the new rtr dist in your Javelin with its current wiring. Would like to see if you different results (runs smooth, no popping/shuddering) or the same as I experienced thus you needing to follow my wiring.
Pls let us know. Thx. Greg
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Greg E.
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White70JavelinSST
Supporter of TheAMCForum Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4867 |
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I purchased a second MSD 8523 about four years ago for use in a fresh build 70 390. I just opened the box to verify. It has the grey wire, so I'll be using Someassemblyrqd's wiring method probably. What I find interesting is the popping and sputtering some one posted about earlier. That almost sounds like a way out of time setting problem. Like 180 degrees out of time.
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70 Javelin SST, second owner, purchased 1972
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5905 |
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Probably no help, this worked with MSD Box and a UniLite Conversion,
which obviously is different than a Magnetic PickUp, HAL Effect, or HEI |
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Someassemblyrqd
Supporter of TheAMCForum Joined: Jul/02/2012 Location: Renton, wa Status: Offline Points: 459 |
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Roger - agree, good discussion. With my ‘70 AMX, I wanted to stay with the original wiring and electrical system schematics. I initially used Armand’s (White70) wiring diagram for my MSD 8523 dist. because of common wiring - it didn’t work, hard starting, popping, shuddering, etc. I believe this due to Armond’s dist being 10years older, no grey wire for tach wave signal, which my dist has. I believe this is why other current 8523 dist owners are experiencing hard start/run issues.
By adding a discreet 12v line to the dist tied into the ignition wire before the pink resistance wire, I accomplished the best of both old and new: modern 12v dist, integrated into the original ‘70 wiring, no tach upgrade expense. Thanks. Greg
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Greg E.
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Bucks AMX
AMC Apprentice Joined: Oct/18/2015 Location: Michigan Status: Offline Points: 88 |
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To solve the issue of can't shut car off go to this link (MSD Tech Support) and click the Engine Run On tab. Follow directions, it worked for me. I have the factory tach as well as an Autometer tach and both are operational with the RTR distributor.
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1970 AMX 390 4spd Golden Lime
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