sparkplug wires

[metalmechanic]

i just upgraded to granetelli wires, should i have put that oem heat shield on the boots, LS 1, KOOKS HDRS W 1700 degree coating

[FTA1995]

depends.
do you have aftermarket headers?
Do you have lessened clearance to spark boots?
What is the temperature range for the wire silicone?
Its probably not 100% necessary but it won't hurt.

[Injuneer]

He has "KOOKS HDRS W 1700 degree coating".

I wouldn't bother using the metal heat shields. Most premium wires have high temperature boots that will stand up to header heat. The fact you have your headers cera-metallic coated reduces that heat level a bit. I don't know what the Granatelli wires look like... they aren't very popular. I run a set of MSD 8.5mm SuperConductor wires, and do not use the metal boots. Wires have been intact for 8 years now. My wire routing is completely under the headers, not over the top.

If you have a close fit, consider using the Taylor woven fiberglass "Fire Sleeves". I used them when I squeezed 10.4mm Taylor 409's under a set of shorty headers on my LT1.

[99Firebird3800]

He has "KOOKS HDRS W 1700 degree coating".

I wouldn't bother using the metal heat shields. Most premium wires have high temperature boots that will stand up to header heat. The fact you have your headers cera-metallic coated reduces that heat level a bit. I don't know what the Granatelli wires look like... they aren't very popular. I run a set of MSD 8.5mm SuperConductor wires, and do not use the metal boots. Wires have been intact for 8 years now. My wire routing is completely under the headers, not over the top.

If you have a close fit, consider using the Taylor woven fiberglass "Fire Sleeves". I used them when I squeezed 10.4mm Taylor 409's under a set of shorty headers on my LT1.

A friend of mine tried that once when he ran the wires over the top on his old LT1. It didn't work out so well though, because he burnt the wires off 3 cylinders and was misfiring hard on the other 5 - those 'fire sleeves' didn't do anything for him. It was probably just the fact that he ran 'em over the top and tried to wire-tie them in place that caused the issue.

[Injuneer]

A friend of mine tried that once when he ran the wires over the top on his old LT1. It didn't work out so well though, because he burnt the wires off 3 cylinders and was misfiring hard on the other 5 - those 'fire sleeves' didn't do anything for him. It was probably just the fact that he ran 'em over the top and tried to wire-tie them in place that caused the issue.

Exactly the way I ran the 409's, and the fire sleeves worked perfectly.

[FTA1995]

A friend of mine tried that once when he ran the wires over the top on his old LT1. It didn't work out so well though, because he burnt the wires off 3 cylinders and was misfiring hard on the other 5 - those 'fire sleeves' didn't do anything for him. It was probably just the fact that he ran 'em over the top and tried to wire-tie them in place that caused the issue.

I did that with mine for about two years, just recently switched back to the under plug and port set up again.

Over the top and through the headers, never had a single problem without any protection whatsoever. The guy before me did, but he was a tool.

A good Mylar and fiberglass composite sleeve can save a whole lot of damage from a plug wire.

[metalmechanic]

im ok without the shields,these headers are great,the only part of the boot near some of the pipie is the top of the boot which wouldnt be covered by the shield anyway,the wires are ok, i had to repair one, i ripped the end out of it, i just replaced the plugs and put the reccomend gap .040, my car seems to run better this way, i was at .055 and it didnt like it