What do you think of this plug?

Mopar Sam said
What is the timing at cruise? What vacuum? Any vac advance involved?
On my wife's car with fuel injection it took a lot of messing with timing as well as fuel to get rid of idle and in town low rpm surging. What it ended up wanting was the exact opposite as what I would have guessed.

Oh, what do the rest of the plugs look like?
Click to expand...


All the plugs are very close. No vacuum advance. I don’t have the distributor curve sheet right in front of me but IIRC the timing is all in by 2200. It has 18 initial on it (at about 750 RPM) and at a 900 RPM in gear idle it has 22 degrees. It has 41 degrees total timing.