Hi guys,

I want you to share your opinion and experiences on spark plug wires.

IMO the less resistance on the wire better.

So, no talk about "suppressing" and so on. The less ohm/feet better. Is it rigth?

Sure we have to consider somethings about eletromagnetic field created on some wires that could interfer on eletronics stuff like EFI.

What do you think? Which set of wires do you use? Any proven difference on dyno have been showed changing wires ?


BR,
Fernando

I run a MSD 6AL so I use Taylor Spiro Pros. Other wise I would run solids.

from what i have been hearing Firecore 50 wires are the way to go. hes a member here sunroofgtx?

Apparently there`s more to wires than just resistance I`m no expert but you`ll be hearing all about it shortly I`m sure. I`m using the firecore 50`s and they seem to be working well.

I just bought a set of Firecores for my street car and will replace my MSD wires with them next year in my street/strip car. And yes, you should be getting a short written demonstration soon, Hi Rick

I run the firecores on my small block and they work great.
I plan on EFI for my Big Block

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Surely we have to consider somethings about eletromagnetic field created on some wires that could interfer on eletronics stuff like EFI.

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I am interested in this question as well.

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Surely we have to consider somethings about eletromagnetic field created on some wires that could interfer on eletronics stuff like EFI.

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Run some solid cores and turn on the radio...

I just run quality spiral cores and have never had problems. Unless you're racing I doubt you could tell the difference between 500 ohms/ft and 50 ohms/ft wires. The difference in voltage drop across the wire compared to the spark gasp is very small. If you run the old carbon core wires at 10,000 ohms you can feel the difference.

For the most part its alot of hype, not more than a couple horsepower between any wire.

I agree. Comparing like quality will reveal little difference. We use Moroso but the Firecores are also very good.

i like the MSD's but may try the Firecores when the MSD's get old, if the price is about the same.

I don´t want to hear a Radio on my Dart... just the sound of the engine...

I´m just worried about the interference on my EFI circuit.

if I could run solid wires I would. but Mallory says not to with their hyfire box so I wont. I would run them with a chrome box though without hesitation.

As for resistance, just remember this, before the plug fires, there is an OPEN circuit. Infinite resistance. Once the arc has sparked, and the wire starts conducting, the resistance goes down.

theres a lot of complicated math and engineering behind a spark plug firing but to make it stupidly simple, lets assume its as simple as ohms law.

if you do, you can see the difference in spark voltage between a 50 ohm wire and a 500 ohm wire is negligable at a given current. E=ir so figure a 1 amp current (not sure what it is in the real world but 1 amp is close enough for this calculation). lets use a firing voltage of 20,000v (just picked it out of my butt)

with a 40ohm wire, that would give you the voltage at the plug as 1amp=(20,000-x)/40 so x=19,960v

using a 400ohm wire, you get 19,600v firing at the plug. not much of a difference in the real world.

With that said, im sure I made a mistake somewhere and someone more experienced than me will correct me.

I will say that am running the firecores and like them alot

dart_73,

PM jake68, he has great knowledge on this issue!

Firecores, Sunroofgtx great to deal with! Bought a set last year.

I'm running Moroso Ultra40's. So far, the best wire I've ran on my Fury. I tried Accel's, MSD's, & Taylor.

I did have a set of the Firecores when I first built the engine. But, to be fair, I shouldn't have used them for the break in. The heat from the headers killed them & caused the terminals to seperate from the wires when I tried to the change the plugs. I do want to try them again now that it's broken in, but I need to wait for the Ultra40's to go south first.

on my junk, ive ran solid core jacobs, ive also ran msd's, taylors, mallory sidwiinders, and moroso wires and there wasn't a lick of et difference between any of them.

if i wanted a good blacvk wire id most likly go with the firecores to support them, but i like red wires so i typically run moroso's

Firecore here great wires and price

has anybody done any runs or dyno tests with different wires?

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So, no talk about "suppressing" and so on.

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there's a reason the electronics manufacturers warn against using solid core wires and it's not to sell you supression wires. anyone that's been in the automotive field long enough has seen problems due to either bad wires and/or solid core wires when using electronics. for a magneto or old breaker type ignition they're fine but for anything else with electronics you need a quality supression wire. imho there's darn little if any difference between any of the quality wires out there and installation is more important than the wire at that point. how many factories can possibly be making the bulk wire anyhow? there's a lot of "branding" and marketing going on.

as you mentioned the boots and terminals are oh-so important as well as routing which is often overlooked. while most of the wires today can withstand the ignitions output insulation puncture from high voltage is always a concern. can you comment on who is making the wire without divulging any proprietary info and/or who Moroso gets their wire from?

I believe Moroso makes their own - in house factory.

Yes, in Dayton...