How do these plugs look???

[yellow rose]

Yup. Way fat at WOT.

That HUGE black ring only needs to be .100 wide.

I wish I could put a magnifying glass on the porcelain.

But you are definitely fat at WOT.

See...you CAN read plugs on alcohol based fuels.

 

[Budgetmoparman]

Yup. Way fat at WOT.

That HUGE black ring only needs to be .100 wide.

I wish I could put a magnifying glass on the porcelain.

But you are definitely fat at WOT.

See...you CAN read plugs on alcohol based fuels.

So if I understand you correctly, everything is good except it is rich at wot? I don't need to change the heat range of the plugs? I just need to do a little carb tuning?

 

[yellow rose]

So if I understand you correctly, everything is good except it is rich at wot? I don't need to change the heat range of the plugs? I just need to do a little carb tuning?

Yep. Idle and cruise look fine. I'm not 100% sure on the heat range. I don't hardly ever use Autolite plugs so I'm not real familiar with the temperature the cad plating comes off. If looks to be close to the plating NGK uses and if that's the case you are close on heat range.

Whoever it was that said it was fat by the black on the shell may be able to tell you more about heat range with that brand of plug.