Well, I'm sure glad that I sent my carbs back to Lockwood. They really stepped up to the challenge. They first installed my carbs on their test engine and it ran like KRAP. Hurray, they have seen the problem!! Then they sent the carbs back through their shop and ran them on their test engine again with the same results. Additional carb teardowns, re-assemblies, and installing them back on the test engine finally proved successful. They even installed them on a flying aircraft to verify that they are indeed fixed. In their words "Smooth as glass" Best guess is that their was probably a tiny machining particle in one of the carb body port somewhere that was finally extracted through the multiple cleanings. Probably during the manufacturing process. I have since learned that this is not the first Bing carb to experience this, some of which have simply been replaced.
Yeah, I know. I have not installed and ran them on my engine yet, but I really do have confidence after getting the report. I will know for sure next week, so stay tuned.
I will not go through this again. Should I have carb issues in the future, I will make one attempt in my shop to fix it. If I still have a problem, in the trash they go, and a new set goes on; be-dammed the cost.....Tom