[wrogers55]

What is the best NGK plug for a 418, 550HP SBF.

Situation is this:
AFR 205s
Very Nasty Cam
Mass Flow Injected
Pump Gas
10 to 1
Never runs hot, 80C hottest ever
Will not be raced
Cool Northern Calif Weather
2,200 or a bit less at 75-80 on the Freeway
Lots of in town stop and go driving (red lights)
Runs great and logs 17-18 on the highway cruising
Run up in to redline in 2nd and part of 3rd on rare occasion
Longest run probably an hour or half that.

Chasing another problem, I took out the builders BKR7E plugs at 3,500 miles and they are fluffy black and look way to cold.

Drove it to running temp and then about 20 minutes on the freeway, got it home and shut it down with very, very little idling before I pulled the plugs...very black, fluff on center electrodes

Will certainly consider other brands as well. Just trying to get a starting point.

As always, thanks.