Jerry:
Your mention of a 3 carb system and the firing order got me thinking, which I don't do to well.
Given the 360 degree camshaft cycle of our engines:
The carb feeding cylinders 1 and 2 would get demand at 0 degrees and 240 degrees (240 degrees from #1 cylinder to #2 cylinder, but 120 degrees from cylinder 2 to cylinder 1).
The carb feeding cylinders 3 and 4 would get demand at 120 degrees and 300 degrees (180 degrees from #3 cylinder to #4 cylinder and 180 degrees from cylinder 4 to cylinder 3). This would be the only carb with an "even" demand time between its 2 cylinders.
The carb feeding cylinders 5 and 6 would get demand at 60 degrees and 180 degrees. (120 degrees from #5 cylinder to #6 cylinder, but 240 degrees from cylinder 6 to cylinder 5).
Would this "imbalance" of demand of cylinder pairs 1/2 and 5/6 cause any "weirdness"?
This is all theory to me. I'm sticking with my single Carter YF.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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