Plug Wire Impedance

  • SWest
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  • Patton
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Re: Plug Wire Impedance

15 Jan 2017 10:28 - 15 Jan 2017 10:33
#752245
Patton wrote: . . .
One and only one resistance component may be used in the secondary loop (i.e., cap OR wire OR plug).
More than one resistor component is too much resistance, which weakens spark.

Actually don't need any resistance component in the secondary loop, which many owners achieve by fitting non-resistor caps to the stock wires and keeping the same stock non-R plugs.

Running without a resistance component in the secondary loop is expected to cause radio interference (if that matters). . . .



When checking plug spark, will have to look really fast to see which way the spark is jumping between the center electrode and the ground electrode. :lol: :lol: :lol:

Good Fortune! :)
1973 Z1
KZ900 LTD
Last edit: 15 Jan 2017 10:33 by Patton.

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  • WABBMW
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Re: Plug Wire Impedance

19 Jan 2017 08:22
#752488
I have had good success using Packard 440 wire. It is solid copper cored and the correct diameter to be used with existing caps, etc.

Inside the plug cap is a small resistor thingy, about 5/8" long. I removed it and replaced with a solid steel piece, made from a large nail. Worked well. OR replace the caps with more modern ones, and solder the wire core to the little metal piece that surrounds the spark plug top.
Bill Baker
Houston, Texas
1982 KZ650 CSR
2008 Yamaha FZ1
2006 Yamaha FZ1
1977 Honda Supersport 750 four (sold)
1984 Honda Nighthawk 650 (sold)

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  • BIGKEVIN
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Re: Plug Wire Impedance

22 Jan 2017 15:21
#752695
I ordered the Dynatek DW-300 spark plug wires. The only problem I seem to have with them is getting the plug wire to stay attached to the Accel coil. Is there a special took need to get the wire to stay connected to the coil ?
1976 KZ900
2006 ZX6R

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Re: Plug Wire Impedance

22 Jan 2017 17:38
#752706
The boot/cap normally does that plus the crimped connector snaps in.
Steve

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Re: Plug Wire Impedance

26 Jan 2017 16:08
#752963
I got them crimped onto the coils and seeing a good blue spark. Thanks for the assistance.
1976 KZ900
2006 ZX6R

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