Audi Junkie

Copper anti-sieze is prefered over the more common Nickel-based for Aluminum heads.

bla4ck

did you wear a hazmat suit while doing that? that looks like a 4hr job.

Murphy'sSidekic

Good to know - I didn't know there was a copper-base anti-seize.

Murphy'sSidekic

Haha, hazmat suit? It's a quick job - 25 minutes; just trying to be thorough for others.

jack_2.0_b7

why would you use copper plugs?????????????

Murphy'sSidekic

Platinum and iridium are used on the center electrode to reduce electrode wear. This provides a longer SP life, which means less maintenance. However, with the long life of these plugs, the gap increases and results in a change in the spark voltage and power. I use the copper plugs because:
1) I don't mind changing them, and the short life of the coppers forces me to change them frequently and learn how my engine is performing.
2) With the short interval required by the coppers, the gap remains fairly consistent and unchanged, resultinig in uniform spark voltage and power.
3) Coppers are cheap.

Mrkrad

The copper will wear out faster and is cheaper.

The solid platinum are designed for 60K+ miles and don't really wear out so fast but cost helluvalot more.

You can't run nitrous with platinums

that being there is no advantage of copper other than cost, and that the electrode will wear out faster requiring more frequent replacement.

unless your EGT's are too high (melt piston/valves high) or you are detonating the proper temp solid platinum should not wear out prematurely.

MikTip

Most excellent write-up! :O)

Murphy'sSidekic

Thank you sir.

psuaudi

i found that no dielectric grease or maybe just a little on the ceramic is ok