[priobe]

markha,

Yes, it sounds like the bypasses are "00".

As for tuning. the main do come into play with the butterflies are open but only passed the transition circuit.

Actually this brings up a good point.

Look at all of your 48 IDA. Look down the barrel and you should see 2 or 3 holes. Verify that all carbs being used have the same amount of holes. How many holes do you have ?

Back to mains.

The reason why I say not to worry about the main is because you want to get the transition and drivablility down pack. When you pull off from an idle, especially with the "00" bypass you will get introduced fuel from the pump jets which can make hard to distiguish your idle circuit.

Basically , pull off slowly and and let the rpm gradually increase to about 2000 - 2500 and shift and do the same for the next gear. Once you see that this is able to respond clean, then increase the effort of movement to the gas pedal. This will help with you traveling at say "55" mph and you wanting to increase you speed slightly. You will be running off of you idle circuit at this time and your mains will probably wont be engaged at this time. The key word here would be slightly increase. If your pump jets are too large this will create a bog from too much fuel at such a low engine speed.


If you choose to use a 155 main you will probably run rich which is better than lean. You can then figure out with the LM1 if your Etube and mains are working with the right value.