Holley Dual Sync and MSD Ignition on a Terminator X Foxbody Mustang

Johns car has been experiencing a high RPM misfire. Granted his engine is quite stout but we were thinking the original TFI distributor might be struggling with the 7000rpm redline.

We install a MSD/Holley Dual Sync distributor and a MSD 6A ignition box to his car. With it running on a Holley Terminator X computer system this changeover is quite easy with a bit of wiring and a few clicks of the keyboard.

You should also perform a static timing check when it's all buttoned up before driving or tuning.

If there is any additional bits of information you would like to know about the installation, please feel free to leave a comment.

[jamesrowe]

Stick...isn't it great that we finally are in one place long enough to get our motorhead on?...have a great TSgt here at Mother Rucker w3rd FTS that has that 68 Camaro...hes helping me get my LS squared away...love what u n Zapp are doing...love the foxbodies too...just sold the 327 with the TH350 trans...LS and Tk56 about to go in ...

[childers]

I saw in the other video ya all made with his car on the dyno that it had a billet camshaft. You might want to change it to brass. Also love the videos I’ve learned a few things. Thanks

[SneakyPeteUK]

Those plug leads will fit my cap nicely John 🤪

[jasonbrinegar]

Nice upgrade and money well spent for sure! I hope not to offend anyone here and am only looking to give advice if you're open to take it? From what I seen at a glance up you could stand to remove at least 20% of fuel at idle. If this is still the base fuel map I'd be willing to bet that will be the trend throughout the entire table as well. In my opinion that transfer and smooth method is almost unreliable and takes way longer to prefect than it should! If possible, you'll have faster and greater success sitting in the passenger seat real time tuning with learn turned off. (So long as you can trust the driving ability of your buddy!!) LOL

[NickWhite]

I'm getting ready to do this and I've seen some complaints of the stock fuel rail crossover line interfering with the distributor install. It didn't look like you changed the fuel line but just wanted to see if you had any issues with that?

[frankconte]

Great video, nice job on the install...did you make sure to SYNC the timing with a "timing light" after you got it started? You have to make sure the timing light number at the crank matches the static timing check number you set in the software at idle and at higher RPM to make sure you don't need to adjust the inductive delay. In the video, you just stabbed the distributor, and did the LED setup then just fired it up and never showed the timing light sync check, unless I missed it?

[FoReVeRdYiNg]

They make a cap for that where you can run coil near plug

[d.collier_]

I’m currently building a sbf for my street truck. Will the tfi distributor be okay, or do you recommend the dual sync? Also, is it a direct plug n play with the terminator x or would I still have to wire some things up? Not running a CD box. Only looking at 350-400 hp on my build. Thanks in advance.

[frock]

So I bought this exact same combo I’m running a stock 302 with terminatorX and it runs great but I want to make it more reliable for my high school son, so I’m ditching the tfi and going this route. Just wanted to know how has it been running for you ? Are these distributors good for daily drivers ?

[marcusfabiousmaximus]

Was the length of the dual sync wire too long for the harness ? Good video

[timelesssteelgarage]

How's the electric water pump on the street? Always been curious about running those myself. I had terrible luck with MSD boxes. So sensitive. Hopefully the qaulity has gotten better. Good call on the shock absorbers....mandatory, lol. They don't like heat either. That cars turning out awesome . Be awesome to pull up to a bar in that thing lol

[abcdqwertyjukmn]

Newbie question but with this set up, it does not need a tfi module anymore?

[antionewalker]

I was told with the universal terminator x and the dual sync distributor a cd box isn’t needed

[nicksolimini]

If I’m running a Terminator x and a MSD ignition box already, would I just have to plug the dual sync into my terminator x harness and update the tune? Did you just tuck the tfi module harness away after this upgrade?

[GarageBuiltCoupe]

Confused why you pointed #1 at the back driver side? Isn’t #1 the front pass cylinder

[maximusvonce]

Did you have to prune, cut and remove connectors on this Holley Ford small block Terminator universal harness to make this fit?. Or did you just leave harness as is and ziptie out of the way? My tech said he charges another $500 to prune, cut, and remove not used connectors and wires to make it fit nice on my 68 Mustang, or he can just keep harness as is and ziptie out of the way. Just curious what you did. Personally i dont like cutting anything on a new Harness period.