Ignition wire resistance?? - Team Camaro Tech
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post #1 of 8 (permalink) Old Nov 15th, 10, 10:07 AM Thread Starter
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Steve
 
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Ignition wire resistance??

While troubleshooting my engine shut down problem, I discovered the resistance of my coil to distr wire is around 8500 ohms. I measured one of the plug wires and it was 18000 ohms. These 7mm AC Delco Premium wires look fairly new. Are these values normal?

69 SS, 350/300 h.p., M-20, 12 bolt, matching numbers.


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post #2 of 8 (permalink) Old Nov 17th, 10, 12:09 AM
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Re: Ignition wire resistance??

I would guess so.
The resistance of high tension leads is specified by the foot, so longer wires have more resistance.

You should be able to find a spec somewhere online.
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post #3 of 8 (permalink) Old Nov 17th, 10, 12:33 AM
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Re: Ignition wire resistance??

Typical resistance for a conventional carbon wire is somewhere around 10,000 ohms per foot.

'69 Camaro
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
500hp/538lbft

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'02 Z/28 vert-stock-sold and totaled
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post #4 of 8 (permalink) Old Nov 17th, 10, 03:42 AM
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Re: Ignition wire resistance??

or 10K ohms for short


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post #5 of 8 (permalink) Old Nov 17th, 10, 04:48 AM
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Re: Ignition wire resistance??

Quote:
Originally Posted by dawg View Post
or 10K ohms for short

No, 0 ohms for short.

'69 Camaro
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
500hp/538lbft

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'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
'02 Z/28 vert-stock-sold and totaled
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post #6 of 8 (permalink) Old Nov 17th, 10, 05:37 AM Thread Starter
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Re: Ignition wire resistance??

I did find some info online saying that some wires are 10,000 ohms per foot, which puts mine in the ball park. I just couldn't find anything on my specific wires. I'm replacing them with wires that have a resistance of 500 ohms per foot.

69 SS, 350/300 h.p., M-20, 12 bolt, matching numbers.


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post #7 of 8 (permalink) Old Nov 21st, 10, 09:06 AM
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Re: Ignition wire resistance??

Steve - Plug wires have resistance in order to prevent radio interference. 10K ohms per foot is normal and won't affect performance.

69 RS, Hugger orange/black, Deluxe interior, Sony AM/FM/XM/CD, PS & PB. 355, forged pistons, Eagle rods, balanced, Iron Eagles, 9.4:1 CR, .038 quench, XR270HR Cam, Z28 intake, FAST-EZ EFI 2.0, Thorley Tri-Ys, TCI 700R4, 2400 stall, 3.42 posi
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post #8 of 8 (permalink) Old Nov 22nd, 10, 08:45 AM
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Re: Ignition wire resistance??

Quote:
Originally Posted by Steiner View Post
No, 0 ohms for short.
Now, that's funny.
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