OK, here's some instructions I wrote a little while ago on what I do with SU's. it should get you a well running car, but it will probably need further adjustment after this to get it running totally spot on:
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Here us what I do, and it seems to work for me. To set my carbs I do lots of measuring! Please check the books for how many turns in/out everything should be for the base settings, I can't remember them!
I balanced the carbs by removing the dash pot, spring and piston. Mine were rebuilt not too long ago (mileage wise) by me so I know that the gaps on the butterflies when fully closed is correct, which is a key starting point.
Then disconnect the linkages between carbs and wind the stops for both out fully until they are in their full resting position. Now wind each stop screw in carefully so that this is now just touching when closed.
Then add the book figure for base number of turns to each stop screw- I can't remember what it was...
Now you have two carbs that are balanced at idle, but not connected.
Now adjust the connecting rod until it looks like its the right length to not push/ pull anything. Connect it and see if the slave throttle position is moved at all. If it does open the slave throttle, then adjust and try again.
Keep doing this until at rest both are closed. Then operate the master carb and watch the butterflies on both. You will probably find that there is a delay before the slave opens, due to slack in the ball joints on the linkage. Very carefully shorten the linkage by a tiny amount and operate the throttle again. Repeat until both open identically.
Now you have carbs that are balanced through their operating range.
Next is the fuelling. I wound each mixture screw fully in to lower the jet, then raised them by the book figure, which is something like "adjust so flush with the bridge and then turn two and a half turns in ". Use a set of vernier calipers to check each jet is same distance down from the bridge
Now reassemble and start the car. When its at normal operating temp adjust mixture evenly on each carb to obtain highest rpm, and use the lift pin method to check where you are. Once done you can remove the tops of the carbs and check jets with verniers again if you like.
Then setup the choke - I haven't done this properly yet!