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I have an 02 C5 Z06 and am still learning about the Gen III LS6 engine it has.
My question is, when it comes to spark plug wires is looking for a set with 0 Ohms per foot the goal? I’m seeing all the usual high end brands but seeing the Ohm-per-foot rating all over the place.
Can anyone explain if 0 Ohms is ideal or 40? Or whatever?
I have an 02 C5 Z06 and am still learning about the Gen III LS6 engine it has.
My question is, when it comes to spark plug wires is looking for a set with 0 Ohms per foot the goal? I’m seeing all the usual high end brands but seeing the Ohm-per-foot rating all over the place.
Can anyone explain if 0 Ohms is ideal or 40? Or whatever?
I appreciate any advice 🤟🏻🏁
Erik(LI/NY)
All i can tell u is stock wires are 25mhs per BLUEBLOWNZ06 AKA Bret. Thats what he said yres ago anyway might have changed.
The LS spark plug wires are very short, so resistance per foot is not a big issue. There is very little energy loss due to resistance. There is NO performance gain from going with an ultra low resistance spark plug wire on a LS engine.
What is a big issue is EMI/RFI, so you need high quality spark plug wires with the correct ferrite core that minimizes any potential static noise interference. There is a whole lot of electrical engineering and physics that I am not going to explain here, which involves particle attenuation, insertion loss in terms of dB and frequency ranges effected.
Let's just cut to the chase. Buy a set of the GM Performance 8mm Red spark plug wires. The old p/n 12495619 had the straight spark boot for the LS1/6. The newer p/n 19351568 (IIRC) has the LS2 spark plug boots with the angled ends that direct the wire upwards.
The LS spark plug wires are very short, so resistance per foot is not a big issue. There is very little energy loss due to resistance. There is NO performance gain from going with an ultra low resistance spark plug wire on a LS engine.
What is a big issue is EMI/RFI, so you need high quality spark plug wires with the correct ferrite core that minimizes any potential static noise interference. There is a whole lot of electrical engineering and physics that I am not going to explain here, which involves particle attenuation, insertion loss in terms of dB and frequency ranges effected.
Let's just cut to the chase. Buy a set of the GM Performance 8mm Red spark plug wires. The old p/n 12495619 had the straight spark boot for the LS1/6. The newer p/n 19351568 (IIRC) has the LS2 spark plug boots with the angled ends that direct the wire upwards.
Thanks for the tip. I actually have those wires on now, but plan to buy Holley’s Tall Valve Covers with the neater coil mounting and pre-assumed that I will need a longer set of wires.
Be aware that the stock LS1/LS6 coils will not fit on those valve covers. These valve covers are design for the LS2/LS3/LS7 coils which have a different mounting bolt pattern than the LS1/6 coils. Plus if you switch to the LS2/3/7 coils, you will need a new pair of harnesses for those coils as the primary connectors are different between the LS1/6 and the LS2/3/7 coils. Also once you are done with that you will also have to have your ignition dwell control MAP reflashed to work correctly with those LS2/3/7 coils, since it is different than the dwell control MAP for the LS1/6 coils.
Last edited by JHrinsin; Jan 19, 2023 at 01:03 PM.
Be aware that the stock LS1/LS6 coils will not fit on those valve covers. These valve covers are design for the LS2/LS3/LS7 coils which have a different mounting bolt pattern than the LS1/6 coils. Plus if you switch to the LS2/3/7 coils, you will need a new pair of harnesses for those coils as the primary connectors are different between the LS1/6 and the LS2/3/7 coils. Also once you are done with that you will also have to have your ignition dwell control MAP reflashed to work correctly with those LS2/3/7 coils, since it is different than the dwell control MAP for the LS1/6 coils.
Wow Thanks for that info! Those were the ones I was going to buy too. Do you happen to know of a tall valve cover in that price range that isn’t junk?
This is the proform setup. I had the valve covers powdercoated, which made the grooves for the gaskets a little too full and slick to hold the gasket, but after wire brushing those clean they are a great valve cover.
The LS spark plug wires are very short, so resistance per foot is not a big issue.
Let's just cut to the chase. Buy a set of the GM Performance 8mm Red spark plug wires. The old p/n 12495619 had the straight spark boot for the LS1/6. The newer p/n 19351568 (IIRC) has the LS2 spark plug boots with the angled ends that direct the wire upwards.
Also if you relocate the coils higher or more inward toward the fuel rails, a set of spark plug wires for a LS truck engine are about 2" longer than those for the car applications.
To answer the question: 50 - 300 ohms/foot is considered good.
And I agree with the length of LS wires it's not important. I've found no reason beyond aesthetics to run anything but AC Delco wires
This is the proform setup. I had the valve covers powdercoated, which made the grooves for the gaskets a little too full and slick to hold the gasket, but after wire brushing those clean they are a great valve cover.
The red wires I just pulled from my 02 Vette Ohm at between 375 ohm and 380 ohm. The wires and plugs have 40k miles on them.. The AC Delco 41-110 plugs still looked good and all gapped at .040.
The LS spark plug wires are very short, so resistance per foot is not a big issue. There is very little energy loss due to resistance. There is NO performance gain from going with an ultra low resistance spark plug wire on a LS engine.
What is a big issue is EMI/RFI, so you need high quality spark plug wires with the correct ferrite core that minimizes any potential static noise interference. There is a whole lot of electrical engineering and physics that I am not going to explain here, which involves particle attenuation, insertion loss in terms of dB and frequency ranges effected.
Let's just cut to the chase. Buy a set of the GM Performance 8mm Red spark plug wires. The old p/n 12495619 had the straight spark boot for the LS1/6. The newer p/n 19351568 (IIRC) has the LS2 spark plug boots with the angled ends that direct the wire upwards.
100% DIT DOT CORRECT! Best bang for the buck wires going!! The fit correctly, Stay connected, are high quality and NOT over priced!
If memory serves me correctly, the service manual says 250 -750 OHMS end to end. Most of the C5 wires thatI have measures are pretty close to 330. ohms.
UPDATE!!!! Wow! Just install new GMPP plug wires. They OHM out at 25 ohm! The Vette now runs like a dream. Big difference from 375 ohm to 25 0hm! Also installed 41-962 iridium plugs. This is a one owner car and believe me, I can really see the difference in performance and throttle response.
Spark Plug Wire (Ohm) Question
Best bang for the buck wires going!! The fit correctly, Stay connected, are high quality and NOT over priced! 
