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MG MGA - Carb Sycronization

I'm fussing around with the carbs and have a few questions.

1) Standing facing the carbs on the left side of the car and twisting the mixture nut counter clockwise, am I enriching or deriching the mixture?

2) I've read about using plastic pipes to the throat of the air intake and mixing to the same pitch. I've tried this and really can't seem to get the hang of it. Can any one explain it better, or is ther another way of doing this for the musically uniclined?

Thanks
T McCarthy

nutdown ...richer, nut up leaner. The proper tool to balance the carbs is a UNi-Sync. Costs about $25.00
Gordon Harrison

Definately invest in a Uni-syn.
It makes the job of balancing carbs dead easy.

Rich
Rich McKIe

Mac? I have no problems balancing the carbs and will tell you my technique.
Remove the filers from the rear of each carb. A length of tube in your ear and the other end held between thumb and forefinger. Now place tube into the rear of each carb with the forefinger edge acting as a stop against the mouth of each carb and it should be easy to hear when each carb is sucking the same. The art been ensuring the tube is in exactly the same place on each carb.
Bob (robert) I am turning? yes I once owned an MGWasp!!

Bob

I take my hat off to you guys with very sharp ear sight. I went high tone many years ago from jet engines! I have also gone professionally deaf, having been married 36 years!

For me the sytem mentioned by the guys above turns an audio situation into a visual one, so I guess it's horses for courses.

Steve
Steve Gyles

We are talking about two different procedures. Mixture and balance. Mixture is the gland nut underneath that raises and lowers the seat for the needles. Turning the gland nut clockwise As Viewed From Beneath raises the jet and leans the mixture.
Balance is done at idle and again at 2500 or so. Balance is where you adjust the air flow through so each carb matches. It is done at idle before you adjust mixture. To balance the carbs I use a Uni-Syn, though Bobs aural method works well. Listening to the sound change is much easier than people think. I have played with both methods and both work well.
Once the carbs are Balanced for flow then you adjust for mixture. Mixture cannot be checked with a tube to the ear. Mixture is something that is harder to describe than to show. Find someone who can teach it hands on. Or get a service manual and stumble through.
R J Brown

This thread was discussed on 19/10/2006

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