360 LA installing Promaxx Aluminum heads

74Scooter said

^^^ I picked up a set of the next step cooler plugs... NGK BKR7E. I'll give them a try tomorrow and probably try taking a couple of degrees of timing out of it as the color on that ground strap is a bit close to the base.

Aside from that are we on concurrence that the AFR (for everything other than WOT) is likely good where it is at?

Click to expand...

Ok, just saw this after I made my last post.

Your heat range is fine. That’s an NGK plug. If it was a Champion or Autolite I’d say it’s too hot. NGK has their plugs run hotter than other brands.

Don’t take any timing out. This is pump gas. Not race fuel. You want the burn line almost to the shell. You have it right where it should be.

Pump gas doesn’t read like race gas and neither of those read like methanol.

You are real close. You don’t need a timing change. That’s what it SHOULD look like. Even the carbon on the shell above the threads. That’s pump gas. It’s what you get.