Bacon

iTrader: (12)

Ignition setup
Haltech E6K
Leading- Crane Hi-6, 2 LX92 Coils
Stock trailing coil
MSD Custom wires

22psi boost, C16 Fuel

I run all EGV's for plugs

I was running all 11's, without issue, but on one run I seemed to foul the leadings, ( had bad ignition breakup off the line) so at the track I replaced them with 10's then clicked off 2 10.90's back to back.

flash forward 2 years, im getting ready to head to the track friday night/ sunday (weather)
figured i might aswell put in fresh plugs, and put fresh 10's in the leadings, then when i pulled the trailings i started wondering if running all 10's would be more aplicable of a heat range w/c16.
When Kahn Tuned it i was runnign all 11's for heat range, but a 50/50 c16/ultra 94 mix
so now that i run strait c16 11's seem to be 2 cold of a plug.

Now I cant really read the plugs as the starting and letting it run till NOT to make sure seals didnt stick over the last 2 years has made a true reading impossible, but for the little it has run it have some carbon buildup on the trailings.

so......

sk8world

iTrader: (5)

10's should be fine for what you have. You could probably get away with 9's also. 11's seem to much.

ErnieT

iTrader: (2)

Once you hit over 30psi, then I'd go with the 11.5's....till then the hotter plug is pretty safe