spark plugs for turbo engine

[sdsu_celica01]

I know that the plugs are supposed to be colder than stock, but do they need robbery iridium? Is that the best bet?

[danno]

No they don't have to be iridium. Most FI guys use copper because their cheaper and we know they will need replacing sooner than usual.

[Blue Bomber]

Iridiums will last roughly half as long as usual on a turbo engine, so you'll get around 50K or so on them, vs 3K or less on copper.

[Smaay]

i use NGK BKR7ES copper plugs gapped at about .026