Please analyze these spark plug pictures

[69MyWay]

Can I get an experienced tuner to look at these pics and tell me what you see?

All plugs looked excactly the same. This is out of my 69 Vette with 468 Pro-Flo EFI, edelbrock RPM heads, RPM cam, 1.8 roller rockers, 9.6:1, hooker headers through spiral baffles.

The car has about 9,000 miles right now. I have not changed or cleaned the plugs since I built the motor. I dialed in a lean mixture on my programming. I think I achieved that goal based on this.

I am going to replace these plugs, but was wondering if anybody thinks plugs in this condition would hinder any performance????

[ohcbird]

The elctrode appears to have that paper-bag-brown that it should, but it appears your electrode base is still oil stained. It could be because the pics are too far away / dark, etc. try setting your camera for a close-in shot & get the electrode tip.

Is there any pitting, or spotting of rust color?

What plugs are you running & have you thought about different heat ranges?

[69MyWay]

The pictures are not all that great since I resized them for posting.

The elctrode is actually pure frosty white.

It is an NGK plug in the recommended heat range from the Edelbrock RPM power package.