Calling 340 with Holley 650 dp

340inabbody said
This is currently where I am at. See below. It’s hard for me to read. I see a very small amount of glazing telling me it’s hot. It looks hot. I may have too much advance in at idle. But at heavier throttle I think I am going a bit lean?

What do you guys think? Too rich or too lean?

I just got my bungs welded in so I can hook up an AFR and this will help me.

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I guess I should have started my last post with, put new plugs in it. Those plugs have way too much “drive around” or “idle” time on them to get any real good information from, other than its pig fat at idle.

340inabbody said
18-21 Hg? No way. Highest ever seen was 15Hg at cruise. Idle more like 10-11Hg max! @850rpm vacuum is a premium.

I see what your saying though. If. I am only in the idle circuit then the power valve isn’t active yet right? How do I know she’s in the transition to mains at higher idle set points? Or is idle idle and no mains ever reached until tip in?

She is lopey enough that @ 850RPM in gear makes her unhappy. She likes 1000-1100 rpm…I know too high. This is the quandry.

BTW she is the 4777-7 which has only front mix screws 2 corner?

Don’t confuse timing with idle vacuum. @MOPAROFFICIAL is talking about timing and you are referencing idle vacuum.