jotto

I took the plugs out of the '81 to help with installing the side pipes and hear a lot of people say the best way to see how an engine is running is to read the plugs. I know you are supposed to do a run and shut off the engine then pull the plugs but in reality, mine is strictly a street cruiser and as the plugs were out I thought Id post them up to get some feed back. Pictures aren't the best and I can get better if required but whats the general consensus?

Also, when installing new plugs, whats the preferred gap for a standard HEI set up?
Thanks.













By the way, the plug in the bottom left is number 1 cylinder and was a new plug a few hundred miles ago.

BKbroiler

Those plugs look good to me, about same as mine. I use the factory recommended gap of .045".

bluedawg

They look good to me as well.

jotto

Thanks for the feedback and the info.

Thanks Blue, hope you and the family are well!

REELAV8R

Yep those look good.. 045 is a good gap.

Corvette400hp

The spark plugs look text book spot on. Can't ask better then that.