I had plugs in my engine with a heat range of 44 initially and the edelbrock metered as it came in the box. The plugs looked lean as hell so I went to cooler plugs and went 3 stages richer in power mode and 2 stages richer in cruise mode.
I looked at 2 plugs last night after a 60 mile drive this weekend and I wouldn't even know the plugs have been used.
Shouldn't these things be slightly brown?
what gives.