Proform 850 dialing it in closer
Maybe you already did this. But I'd start with reducing all 4 main circuits to 2 e-holes of .028" diameter or less. [ Or three much smaller. Mark Whitner (Jmarkaudio) has mentioned some ball park starting points for three e-holes. We could dig up one of those posts with a search if you want to try three.]
I'd also make a pass without the secondaries, or at minimum, next time jets are reduced, reduce only the secondaries or only the primaries.
Not everyone likes making a run without the secondaries, but for a guy like me without much experience its a useful technique. I wouldn't make the final tune based on it because a restricted carb is going to distribute fuel differently (prob better), but it I think it saves time by logging a couple passes on primaries only.
After determining the primaries delivered pretty flat AFR, then I started experimenting with the secondaries. The fact the primaries looked rich wasn't important. That I can test at the track. Getting the curve flat I prefer to do on the dyno if I can. In your situation the track is prob just as convenient.
I've used an LM2 a few times. Enough I may be able to help with downloading and saving logs from the SD card. I use LW 3.01 and Programmer 3.25 for reasons I don't recall at the moment.
My gut is its "over emulsified" like most of the current stuff on the market.
Maybe you already did this. But I'd start with reducing all 4 main circuits to 2 e-holes of .028" diameter or less. [ Or three much smaller. Mark Whitner (Jmarkaudio) has mentioned some ball park starting points for three e-holes. We could dig up one of those posts with a search if you want to try three.]
I'd also make a pass without the secondaries, or at minimum, next time jets are reduced, reduce only the secondaries or only the primaries.
Not everyone likes making a run without the secondaries, but for a guy like me without much experience its a useful technique. I wouldn't make the final tune based on it because a restricted carb is going to distribute fuel differently (prob better), but it I think it saves time by logging a couple passes on primaries only.
After determining the primaries delivered pretty flat AFR, then I started experimenting with the secondaries. The fact the primaries looked rich wasn't important. That I can test at the track. Getting the curve flat I prefer to do on the dyno if I can. In your situation the track is prob just as convenient.
I've used an LM2 a few times. Enough I may be able to help with downloading and saving logs from the SD card. I use LW 3.01 and Programmer 3.25 for reasons I don't recall at the moment.