Question re: Ign leads, Tri-Spark, etc

Fast Eddie · Mar 31, 2015

Gents,

Can I pick the brains of any electrickery boffins out there?

I have a Tri-Spark and Crane coil with Taylor HT (ala CNW) on my Commando, and I've been wondering...

1. What is he advantage / purpose of silicone HT leads when compared to plain old fashioned copper core? I thought that copper was about as good a conductor as you can get, so what's the deal?

2. Am I correct in thinking that there should only be one 'resistor' in the HT circuit, either the plug, plug cap, or HT lead... But NOT all 3?

Please keep any answers in practical / laymans terms... I am but a simple fellow...

Thanks in advance,

Nigel.

Nortiboy · Mar 31, 2015

Fast Eddie said:
Gents,

1. What is he advantage / purpose of silicone HT leads when compared to plain old fashioned copper core? I thought that copper was about as good a conductor as you can get, so what's the deal?

2. Am I correct in thinking that there should only be one 'resistor' in the HT circuit, either the plug, plug cap, or HT lead... But NOT all 3?

Nigel.

Hello Nigel,

I use Trispark, old and new type. New type (in points case) supplied with coil from CNW.

1. I use copper core with 5k ohm Cap.
2 Yes, 1 resistor only, equal to 5 K ohm

3 Bikes run perfect and no failures since first Trisparks installed (8 years is oldest).

Cheers

jaydee75 · Mar 31, 2015

Similar here, But a little different. I run Trispark, Accel coil, old school Packard 440 copper wires, and NGK resistor plugs. I firmly believe in only one resistor.
Jaydee

Deets55 · Mar 31, 2015

It is my understanding that only one resistor is required whether it is wire , cap or plug. I would go with the Packard wires and non-resistor cap. I think the copper wires are also less likely to be damaged by vibration.

Pete

Anonymous · Mar 31, 2015

Concur. One resistor type only. I chose plugcaps.

comnoz · Mar 31, 2015

Fast Eddie said:
Gents,

Can I pick the brains of any electrickery boffins out there?

I have a Tri-Spark and Crane coil with Taylor HT (ala CNW) on my Commando, and I've been wondering...

1. What is he advantage / purpose of silicone HT leads when compared to plain old fashioned copper core? I thought that copper was about as good a conductor as you can get, so what's the deal?

2. Am I correct in thinking that there should only be one 'resistor' in the HT circuit, either the plug, plug cap, or HT lead... But NOT all 3?

Please keep any answers in practical / laymans terms... I am but a simple fellow...

Thanks in advance,

Nigel.

The Taylor wires are low resistance helical wound wires. They are not a carbon resistor wire.

They are very durable on a shaking engine and along with the resistor plug cap give excellent performance. Stay with them. Jim

Fast Eddie · Mar 31, 2015

Thanks for the input guys.

Jim, I'll take your advice re the Taylor leads, trouble is, I've relocated the coil (to make space for an oil cooler that I intend to plumb into the cylinder head oil feed).

So I guess I'll just get some longer Taylor leads.

comnoz · Mar 31, 2015

Fast Eddie said:
Thanks for the input guys.

Jim, I'll take your advice re the Taylor leads, trouble is, I've relocated the coil (to make space for an oil cooler that I intend to plumb into the cylinder head oil feed).

So I guess I'll just get some longer Taylor leads.

There are other sources of spiral core low resistance plug wires other than Taylor. I am sure they may do as well.

http://www.magnecor.com/magnecor1/truth.htm

Deets55 · Mar 31, 2015

The Taylor wires are low resistance helical wound wires. They are not a carbon resistor wire.

They are very durable on a shaking engine and along with the resistor plug cap give excellent performance. Stay with them. Jim[/quote]

Jim,

Wow surprising bit of information. I always thought fine strand copper was the way to go for conductivity and vibration. I also figured resistor plugs were generally easier to find than non-resistor, especially if you are experimenting heat ranges and plug types. Plus, plugs get changed more often than caps so you won't have to worry about the resistor caps breaking down. Thanks for more good info.

Pete

chasbmw · Mar 31, 2015

comnoz said:
Fast Eddie said:

Thanks for the input guys.

Jim, I'll take your advice re the Taylor leads, trouble is, I've relocated the coil (to make space for an oil cooler that I intend to plumb into the cylinder head oil feed).

So I guess I'll just get some longer Taylor leads.

Click to expand...

There are other sources of spiral core low resistance plug wires other than Taylor. I am sure they may do as well.

http://www.magnecor.com/magnecor1/truth.htm

Looking at the Magnecor information, they sound to me as if they provide resistance (" low EMI") so if you combine Magnecor cables and resistor plug caps you are doubling up?

comnoz · Mar 31, 2015

chasbmw said:
comnoz said:

Fast Eddie said:

Thanks for the input guys.

Jim, I'll take your advice re the Taylor leads, trouble is, I've relocated the coil (to make space for an oil cooler that I intend to plumb into the cylinder head oil feed).

So I guess I'll just get some longer Taylor leads.

Click to expand...

There are other sources of spiral core low resistance plug wires other than Taylor. I am sure they may do as well.

http://www.magnecor.com/magnecor1/truth.htm

Click to expand...

Looking at the Magnecor information, they sound to me as if they provide resistance (" low EMI") so if you combine Magnecor cables and resistor plug caps you are doubling up?

The resistor caps are 5000 ohms. The spiral core wire is less than 100 ohms for a Norton-ish length.
The added resistance of the wire is of no concern but the reduced electrical noise from the spiral core is good with a digital ignition. Jim

Question re: Ign leads, Tri-Spark, etc

Fast Eddie

Nortiboy

jaydee75

Deets55

Anonymous

Guest

comnoz

Fast Eddie

comnoz

Deets55

chasbmw

comnoz

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