Ignition discussion (Location)

65 3 times · Mar 18, 2019

I am switching my ignition. It is currently under hood. I am moving the box to inside the car. I have seen the coil mounted in car and under hood. When I see a four foot coil wire I shudder but is this a good way to go. I would appreciate thoughts on this. Thanks. Dave

PurpleBeeper · Mar 18, 2019

I would suggest you keep you coil/distributor wire as short as possible to minimize voltage drop along the wire + insulated from heat as best as possible too (short coil/dist wire is more important than heat in my opinion).

beanhead · Mar 18, 2019

Yes keeping the coil-to-distributor wire short is a good thing, that wire fires with every pulse unlike the spark plug wires. Longer wire=more resistance. I also relocated my ECU inside though to keep it cool(and hide it). However, I noticed that being mounted directly to the firewall, even though inside, it still got pretty warm...so I mounted it on a piece of 1/8" aluminum plate cut to match the ECU, and used some Gylon gasket material(it's like a dense foam type of stuff) sandwiched in between the two to provide an insulating layer..works great now the only heat it sees is what it produces while operating.

Shorthorse · Mar 21, 2019

The potential for RF/EM interference in a coil wire is great. I wouldn't trust a long coil wire but if you do, make sure it's path is completely isolated from all other wires. Ignition box trigger wires are also very susceptible to RFI/EMI. They must be isolated as well even when using a shielded cable such as the MSD 8862.

66Satellite47 · Mar 30, 2019

My opinion, box under the dash where accessible, coil near the distrib.

Shorthorse · Apr 2, 2019

If it's strictly a race car, I did this for a friend on his 63. It's a piece of lexan on drawer sliders in the glove box. Works pretty good and is real easy to access.

1967coronet440 · Apr 2, 2019

Shorthorse said:
If it's strictly a race car, I did this for a friend on his 63. It's a piece of lexan on drawer sliders in the glove box. Works pretty good and is real easy to access.

View attachment 743621

Nice work, looks great

LemonWedge · Apr 7, 2019

My MSD Digital 6+ box has been up front under the hood for nearly a decade. Never an issue.

Ignition discussion (Location)

65 3 times

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