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TALKING TORQUE Feel free to discuss your Driving Experience in all other models as well!

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  #1  
Old 18th November 2019, 08:48 PM
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c107 c107 is offline
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Default The SU Carby

Good video on the SU, how it works, adjustments etc.

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Old 19th November 2019, 03:07 AM
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Default Re: The SU Carby

Great video on what is a pretty mis understood and to most a mysterious carby.
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Old 19th November 2019, 06:05 AM
sean sherry sean sherry is offline
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Smile Re: The SU Carby

The next best thing to Fuel Injection....... many many needles available to get it right. The only way it can be upset is an air leak somewhere.
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Old Yesterday, 06:13 PM
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Default Re: The SU Carby

I love SUs. So easy to work on, to adjust etc. etc. Mind you, you need to know a little about how they work. With multiple set-ups, a "floating" vacuum gauge is a "must have" tool in order to make sure that each carby pulls its equal weight. Adjusting the mixture is reasonably straight forward, and is usually achieved by lifting the "checking" pin. However, it can take a bit of time to get that right - the most accurate assessment is to run the engine, or drive the car, for at least ten minutes on a steady throttle, stop the car and remove four plugs (on a V8) and compare the colours of the plugs. A nice grey colour is what you need to look for. Regards Styria
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Old Yesterday, 06:24 PM
sean sherry sean sherry is offline
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Talking Re: The SU Carby

I always found that a "Colour Tune" device was the most accurate way to confirm a Carburetor. The whole range could be checked ( read ) Idle.. acceleration.. cruise and full throttle. With the twin Carbs on my MG . Jaguar and a Riley, two Colour Tunes were necessary, in no 1 and no. 4 cylinders.

Even a very slight air leak down stream of the Carb made accurate adjustments
impossible..... Ask me how I know !!
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