1981 Corvette - Plug and wires
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2nd Gear
Joined: Dec 2025
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1981 Corvette - Plug and wires
So, I found a plug wire resting against my long tube headers and its melted and charred. The engine in my C3 is a ZZ4 crate engine from the early 2000s. It has aluminum heads, RPM performer intake, holly 670 street avenger. I am looking at the MSD 8.5mm super conductor wire set and going to go ahead and get new spark plugs. As far as I can figure out, this car hasn't had a tune up for over 20 years. Any suggestions on what plugs I should be using with this setup and am I looking at an appropriate wire set? I will also be getting wire separators and routing them to prevent them from touching the headers again. Thanks everyone!
Drifting
Joined: Jun 2025
Posts: 1,687
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So, I found a plug wire resting against my long tube headers and its melted and charred. The engine in my C3 is a ZZ4 crate engine from the early 2000s. It has aluminum heads, RPM performer intake, holly 670 street avenger. I am looking at the MSD 8.5mm super conductor wire set and going to go ahead and get new spark plugs. As far as I can figure out, this car hasn't had a tune up for over 20 years. Any suggestions on what plugs I should be using with this setup and am I looking at an appropriate wire set? I will also be getting wire separators and routing them to prevent them from touching the headers again. Thanks everyone!
Spark Plugs: .......................................A C Delco part # MR43LTS
Spark Plug Gap..................................... ......................040”
Spark Timing:................................. ............................32° maximum @ 4000 RPM
install guide for ZZ4 Long Block
https://www.chevrolet.com/content/da...e-24502609.pdf
Install guide for ZZ4 turn key motor
https://www.chevrolet.com/content/da...12499712-1.pdf
*** widely used race-proven oval track plug wire routing experience (where everything gets & stays Very hot):
drape the wires from dist, down & across R&L rear ledges of block, the come up from beneath headers to plugs.
Last edited by Rebelyell; Apr 8, 2026 at 02:13 PM.
