Manifold Vacuum Advance what am I not getting?

What do you recommend? Hope this doesn’t high jack this thread lol thats all I need is to turn a Ported VA vs MVA thread into what the best spark plug to use thread LMAO


I’m only guessing because we don’t know your actual compression ratio or
what your cam timing looks like.

But I’d say a 9 Champion is as hot as I’d start with.

Can you post a picture of a couple of your plugs?

Let’s see what they look like.