Large rpm drop
I doubt it's pulling off the mains at idle.
It was just a thought, I have many of those as I'm sure you do too
Stop STOP using the O2 to get the tune correct. You are trying to live up to a number.
Something wrong with science? Lol I'm not using it to tune my idle, just stating that's where it was landing, adding to info that may help. Not gonna completely disregard the second law of thermodynamics, but I'm not too concerned how rich it needs to be to idle decent. If I can lean it out some and good, if not oh well kinda deal.
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Learn to read plugs first, and then use the O2 to tune with.
Plugs look good, I can pull and take a picture of I need to
I'm doubting you are at 11:1 and if you are, that isn't the cam I'd have picked.
Some calculators put it at 10.8:1 if it makes you feel any better. I'm not sure what to say, I can send to my build sheet. Put it together myself, I'll swear on all I've got the measurements are correct.
It's an amazing cam, zero complaints at all- very streetable and plenty of power.originally I thought it was around 9:1, so we speced the cam for that. Had detonation problems running timing anything I've 32* on 93 octane. Butted rings and broke a ringland, pulled and rebuilt. Made sure to measure everything like I did putting it back together.
What cam would you have gone with?
Autolite 3923