Originally Posted by HyperB5

Still sounds like it's too rich!

You say you leaned it out to about flush after your initial break in! Personally, I always start an engine up the first time with the needles flush. I think by the time I got to the track I was already 1 turn in, roughly.

I would only be speculating of course, but it sounds like you may have had a cold break-in! I only run it super rich for a few minutes to flush it out! having your engine spitting out loads of unburnt fuel for anything longer, isn't really necessary. It just stresses the con-rod trying to compress an overabundance of fuel! I use a break in bench so I can keep a heat gun on it to keep it up to temp while it's that rich.

Lean it out on the HSN a little more and see how it acts at mid to top then work on your idle!