Heat resistant plug wires

[ALANSD]

I recently bought a set of Accel spiral core- heat resistant plug wires. Although my current set was in use only a little over 18 months, they were lower priced NAPA wires, and I worried that the heat would kill them.
Sure enough when I pulled them off, two were charcoal at the ends. Not yet burnt to the point of no spark...but soon....probably on my next Fla run.

My question is on the distributor cover that the top ends of the wires "snap" into...they don't seem to want to snap into it . It's on but not as secure as it was with the old set. Isn't this just aesthetic anyway? If so its probably ok.
Also one spark plug wire passed through a small metal squared off ring, with a little wire wrapped around it..what is this thing? Something to do with the tach/rpm? Just guessing here.
Anyway what a great day in Atlanta for laying on the ground under the AS...75 and breezy
Wish the rally was this weekend!

[biggerbadbrad]

Alan,

The purpose of the retainer is to keep the distributor end of the plug wires in their firing order sequence. This is convenient for distributor and/or cap removal, but it doesn't affect mechanical or electrical engine performance. One drawback to this system is that sometimes an inexperienced mechanic will not properly seat the retainer properly and this can cause arcing and thus engine misfire. Most other vehicle manufacturers don't use this system.

bbb

[ALANSD]

Thanks, kinda what I thought... The new wires don't seat right in the holes, but its tight enough to stay on.
I use a number of those little plastic wire loom thingies to keep distance between the wires, and a couple of the plastic wires covers for those that seem too close together.
After a test drive, I actually noticed better performance. Surprising to me, as the old wires weren't that old.

[davidz71]

I ran into the same thing when I went to Moroso wires on my '77 Chevy K5 Blazer. I just left the ring off and never had a problem.