holley 670 street avenger jetting questions

Hey SirDan, hope life is treating you good :thumbrig:.

I don't have personal experience with the Avenger series, the're after my time. But I have recommended them in the past.....maybe by mistake, especially the 670. I've seen others have what seems to be a lean problem also, but I just attributed it to the mild jetting they come with, or the secondary opening spring needed to be lighter. After further review, these carbs have the same size throttle bores/venturi size as a regulation 600 carb.

I gave Holley the benefit of the doubt as far as stock metering was concerned, but maybe the 670 just acts too small for the rating they gave it.

I love the 4bbl Cleveland! I'm betting it just want's more carb?

Keep us informed on what you find...

Take care, Rick