Thanks for sharing the post about CV carb tuning which parallels my tuning experience so far. I have a 120 main jet, if I set the AF mixture screw 4-5 turns out, I have good throttle response from idle to 1/4 throttle. However using the "idle drop" method to set the AF mixture screw comes out around 2-3 turns out but engine will "bog" or stall off-idle to 1/4 throttle.
Would you recap your present status on the carb for me? I've lost track.
I know you have a short open bottle. What about intake?
I think you're needing way too many turns out on that A/F mixture screw. Should run around 1 1/2 turns out plus or minus a quarter or an eighth (sound like a drug deal
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Zero to 1/4 throttle is all on the Pilot. Maybe you should try putting the Main back to 110, the Pilot back to 15, the needle to the middle notch.
I think I remember I ended up (with open bottle and a K&N filter) leaving the Main at 110, a 17.5 Pilot, stock needle in the middle notch with one shim to make it a hair higher, mixture screw a hair more than 1 1/2 turns out. I didn't bother changing the Main as I never planned on getting anywhere near open throttle. It had nowhere near any break-in miles on it.
Whatever your particular recipe ends up being for your particular engine, it's a sure thing that your engine is getting way too much gas at that zero to 1/4 throttle opening. That's why it's bogging down. Remember to mark your throttle in increments.
Oh Oh and you really must rule out vacuum leaks (but you know that)
PS: This tweaking of my BS-29 was way before the ACE headwork and switching to the TM 32. And the hot tube was yet to Dremeled out and disposd of unceremoniously with extreme prejudice.