Many people say that you should replace your SU carbs with a weber because they never go out of tune. However, they don't mention that getting a Weber tuned is a very long and difficult job. The following list should be used as a guide only and you should try possible settings on the road over say, a standing 1/4 mile, then check spark plug colour, returning back up the 1/4 mile at constant revs in 3rd gear to check that the engine runs evenly. This may need to be done several times.

The following are settings used in 45 DCOE Webers by Club members. Not all are considered perfect by their owners, but they are the best approximation they have to date and may be a useful starting point for members with cars in a similar state of tune. For further possible settings, I suggest that you refer to the Warneford book on Tuning Webers (approx $1.50 [remember 1977 - MG]). It's also good practice to fit a paper air filter to your carb (Weber or SU) as a lot of dust particles do find their way through foam filters. If anyone wishes to try different jets in their car, I have an almost full range from which they may borrow jets to try.