I am rebuilding my carb and plan to drill the jet pre-emptively to avoid Lean conditions. I am building an RV-6A.
I have an O-320B1A (160 HP)with a 10-3678-12 carb. The stock jet is a #40 drill size. I have researched all of the posts on this subject and see drilling to #37-39. I have taken it to #39 and am thinking of going to #38. I was hoping those that have done this on this particular carb/engine size might share their experience/recommendation. It would be nice to not have to pull the carb apart later, but I don't want to wind up over-rich either.
I appreciate your input
I have an O-320B1A (160 HP)with a 10-3678-12 carb. The stock jet is a #40 drill size. I have researched all of the posts on this subject and see drilling to #37-39. I have taken it to #39 and am thinking of going to #38. I was hoping those that have done this on this particular carb/engine size might share their experience/recommendation. It would be nice to not have to pull the carb apart later, but I don't want to wind up over-rich either.
I appreciate your input