Im running a T1 1776cc with o4o heads, engle 110 cam, 009 dizzy, flamethrower coil and twin 40mm weber carbs.
Right now I can't remember all the details on the carbs.
I had kind of the same problem but in worse situation.
the engine was running perfectly at idle and revving, but when it came for realy smooth in traffic driving i had a huge flat spot from almost 2000 rpm to about 3100 to 3300 rpm.
then i was running 115 jets main on 32 venturies (it was only for a day and just to pass for emmulsion card) and the problem was solved with 120 jets main. At the very first time I was running 122 jets main but fuel consumpion was way over normal and expected.Now with 120s I have a range of about 350 kms from full tank to completely empty. Im running my engine strictly on Shell V-Power racing gasoline which has a 99+ octane rating which is considered to be the best gasoline in Greece.
I hope I enlighten you in some way
Chris (beetle1303)
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