I might use Iridium on a big compression, forced induction, etc motor. They are neat since they conduct pretty well, but also last decently long (kinda like the best of plat and annealed-copper plugs). They also have a thin ground strap and electrode which is cool for shrouding concerns.
Warren, if you dont have some decent mods that can take advantage of these benefits, I dont think you would necessarily notice a difference.
ya i kinda wondered, all i am running is few basic mods on the car. Msd 6AL ignition, 8.5 Msd super wires/cap rotor and distributer, BBK shorties, no cats x pipe 2.5" flowmasters 40 series, smog pump delete, cold air intake, and a center force dual friction clutch, on a new Valcun stove.
But I think I'm gunna give em a shot anyways just to see what happens because i can buy them for cheap. Thanx for the info