Which spark plug wire size?

[blackgn231]

I have gotten a lot of info on which ones are the best for the money but not sure about the size? 8MM OR 10MM? I don't race my car but do drive it when I can and would like to know which I should get? And which fit the stock wire looms? Any help would be great thanks guys.

 

[Bruce Urie]

I have gotten a lot of info on which ones are the best for the money but not sure about the size? 8MM OR 10MM? I don't race my car but do drive it when I can and would like to know which I should get? And which fit the stock wire looms? Any help would be great thanks guys.

From past experience, the larger 10mm makes wires no better, just thicker insulation. I use 8mm Kirban wires which fit perfect in the wire looms. They are the right color and length. Give Dennis a call, I think he still sells them. If you want low resistance wires, try the MSD 8.5 mm, they work great on my Vette. I custom cut them to my own specs and they have worked great for years now. Of course, this is my own opinion/experience, you'll find that others on the board here have a different perspective than mine. You have to make you decision based on all of the opinions together. I just stated what works very well with my cars.

Bruce '87 Grand National

 

[berserker6]

call me shallow. but if we're comparing similar performing wires. go with the 10s they look great. imo

 

[theCATman]

What you're looking for in a quality plug wire is OHM resistance per foot. The lower, the better. I don't care if they are 20mm thick, if they have 100 OHMs per foot VS a 7mm wire with 50 OHMs per foot, the 7mm wire is better.

I have MSD 8.5's, 30 OHM/ft on my car & no complaints here.

They are red, but I think they look good. If your going for a stock look, then get gray.

 

[Race Jace]

the cat man is correct. with plug wires you want to have the lowest resistance.

The resistor style spark plugs that most of us run have about 5 K OHMs (yes that is 5000) so if you add an extra 5k which is what most of the 10mm wires i have tested are that is quite a bit.

We have been using low OHMs wires and nonresistor plugs here for a few years and we rarely have to change plugs or wires anymore.

hope this helps