Just got back from a car show in Plano Texas, "Cars and Coffee" But the 68 making the drive home of 65 miles and my new headers were cooking the plug wires and the engine was missing out before we got home. The plug wire were extremely hot.
The plug are going over the valve covers rather than below the headers. .
Don't know which way is best.
My question is what plug wire is the best to have to resist the 500 plus temp that is in the engine compartment and is it better to go under or over the headers for the wires. The engine is a 350.
Vette(s): 1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!
Go under the headers. Heat Rises!!!! Use silicone plug wires.
Vette(s): Coupe 74 - 454
Drive it like you stole it!
Same here. Went through 3 sets of wires already. 74 big block with headers.
In my case, because of the length of the wires; my problem is the boots. I couldn't always route the best way or bend them enough so they don't touch the headers.
Here's what I'm doing next : -get new set of boot protectors -get the Summit Racing MOR-72550 wires (the price is right; I tried 125$ sets and burned them too). -route the wires under the headers (the best I can) and use metal routing clips to help out; hold them in place. Some of them are bolted with the head covers. Some others are inside the spark plug hole; so it adds a later between the wire boot and the header.
And if it's still too hot; since my engine doesn't shine one bit and I don't display it; I'll wrap the headers.
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