Cobalt top entry wires question

[steveg]

Both ads imply the II is for negative ground only (assumed, I guess, if for positive ground they indicate it). Anyone know if there's a II for pos. gnd.?

Steve, these show only two leads, did you add a ground lead? If so, why?

Bob - the calverst.com article linked above makes the case that Pertronix problems are due to a sub-optimum ground. The author encountered this in 2 race cars and it was confirmed by the UK distributor of Pertronix. I ran a separate ground wire through the rubber leading out to the chassis at the coil mounting bolt. (My coil is bolted to the chassis). In this way, I'm circumventing all the joints between the distributor movable plate and the chassis, via the engine and ground strap. After I shot the pic in the previous post, I restored the ground line between the movable plate and fixed plate (belt and suspenders).

I believe the Pertronix II is neg ground only.

 

[Bob_Spidell]

Thanks for the info, Steve. I suspect conductive tape or paste under the Pertronix might help with the grounding issue.

 

[DerekJ]

Regarding the HT leads, after silver, copper is the best conductor of electricity that exists. IMHO the Magnecor wires are overkill, the most expensive ones are for high performance modern engines and are all about EMI suppression which isn’t an issue in a Healey even with Pertronix installed.

 

[Bob_Spidell]

Noticed when I was searching for Ignitor II for 25D6:

"You cannot use solid core (typically copper) spark plug wires with this product. Solid core wires do not suppress electro magnetic interference (EMI) which will interfere with electronics in this product. A suppression style or spiral wound spark plug wires must be used."

Emphasis theirs. My Pertronix (I) works fine with copper wires (I think by 'solid core' they are referring to stranded, as solid copper wires would not only be stiff but would probably work-harden, and stranded conducts more electricity for a given wire diameter).

 

[DerekJ]

My Powerspark is equivalent to Pertronix I. I guess the warning for II is because there is more electronic wizardry involved.

 

[Keoke]

EMI suppression which isn’t an issue in a Healey even with Pertronix installed.​

I agree:
Unless the owner upgrades to a modern sophisticated electronic item in his car, then it may be possible for interference to occur due to the noisy ignition pulses.

My Pertronix (I) works fine with copper wires (I think by 'solid core' they are referring to stranded, as solid copper wires would not only be stiff but would probably work-harden, and stranded conducts more electricity for a given wire diam

Yeah N mine do TOO--LOL​

 

[steveg]

"Solid core wires" is evidently a widely-used jargon term for stranded metal wires. My Pertronix I always worked fine with them. My Garmin and cell phone also worked OK.

Pertronix states on their site that Pertronix II functioning is affected by EMI from "solid core" wires.

 

[John Turney]

Bumblebees work fine with my Crane.