Re: Camping World
Reply #28 –
Just to expand on Chevrolet 454 spark plug wires. Sitting in a Cadillac racing down the highway the GM 454 is loafing along just above idle. When installed in the P-30 chassis as used in trucks and motorhomes the cast iron exhaust manifolds become very hot. There's another whole story about GM exhaust manifold but the subject here is spark plug wire, or more accurately heat shielding and spark plug boots. Now $40 is short money but a bit pricey for ignition wires, but in order to make the 454 reliable as a truck engine, GM had to use metal heat shields with a mylar dielectric liner, and molded high temperature silicone rubber boots. Now you know.