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MSD Street Fire Spark Plug Wires

Joined
Mar 9, 2009
Messages
1,026
Location
Yemen
I have always bought ordinary Belden or AC Delco spark plug wires because of their low cost and good quality. But this time I bought the more expensive MSD Street Fire wires and discovered they are actually solid core wires with a very low 500 ohms resistance per foot. I had to cut 5 of them 6-8" shorter and when I was cutting them I discovered they have a 1/32" nylon (???) core with a real fine wire about .005" diameter and spiral wound around the core; making them true "solid core" wires. The spiral wire was pretty hard and stiff so I assume it's a copper alloy. As the set came with a short coil-to-distributor wire I'll cut it apart tomorrow morning to find out more about the spiral wire.
 

Antz81

Well-known member
Joined
Dec 21, 2013
Messages
936
Location
Auckland, New Zealand
Corvette
1981 4 speed
[h=2]Diagram[/h]
SPW_Callout.jpg

  • Snap-Lock Plug Grip
  • Separate Crimp Tabs for the Conductor
  • Large Crimp Tabs grip the sleeve
  • 8.5mm jacket protects against high heat and resists tears
  • Extra heavy glass braid
  • High dielectric insulator
  • Ferro-magnetic impregnated center core
  • Helically wound copper alloy conductor

Should save you some time.
 
Joined
Mar 9, 2009
Messages
1,026
Location
Yemen
Should save you some time.


Thank you VERY much for the picture. The real fine wire I was referring to is that illustration #8 as it's wound real tight around the center (nylon?) core. I would rate these MSD's as the best wires I have ever bought. As they are so heavy duty in their construction I can see them lasting a very long time..............until they get mechanical damage to them anyway and that'll likely never happen.

It's sure nice to have it hitting on all 8 again after my major screw up. I was so focused on getting my Ram Air installed I failed to notice how close the #2 wire was to the air cleaner base.

When I removed the spark plug "snap" end from the wire I found the spiral-wound wire was simply bent backwards about 1/2" alongside the outer sheath and then the snap end was crimped over it. As I keep the snap ends in stock and I have the special Belden pliers it was real easy to shorten them so they fit better.
 
Last edited:

Hib Halverson

Technical Writer for Internet & Print Media
Joined
Jan 10, 2001
Messages
13,457
Location
CenCoast CA
Corvette
71 04 12 19
The picture posted is MSD SuperConductor wire not "Street Fire".

I have long experience with SuperConductor. I think it's the best plug wire on the market, in spite of it being a bit expensive. I have one set on my 71 which has been in service since the mid-90s. It's really durable stuff, that's for sure. I have it on all my vehicles which have spark plug wires.
 

Antz81

Well-known member
Joined
Dec 21, 2013
Messages
936
Location
Auckland, New Zealand
Corvette
1981 4 speed
You are quite right about it being the super conductor, however I do believe that they are likely to contain the same helically wound copper alloy conductor, with the street fire using a Kevlar based center core while the super conductor uses the ferro-magnetic center core
 

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