I think Jerry was hitting one of those elixirs in his signature when he posted that.
If the gasket for #1 and #2 port was leaking #1 and #2 would be feed the same mixture.
Not guilty, Dave! I definitely enjoy some Gentleman Jack on occasion, or some custom-distilled stuff from a buddy with a 15 gallon copper still and a recipie handed down from the 1920's in the NE Georgia mountains, but the pain meds I'm on right now won't let me indulge for a while longer.
I've seen some very oddball stuff caused by vacuum leaks, including a half-dollar sized hole in a piston crown on a MOPAR 440 that developed in less than 10 seconds. Of course, the engine was developing 700+ HP at 6500 RPM at the time, on the dyno. The leak was at the opposite end of an open-plenum intake from the cylinder that went lean. The only indication of a problem was a quick spike in exhaust port temperature for that cylinder, and it destroyed the piston before I could chop the throttle and back off on the dyno load. The swirl patterns and firing order pulses in a siamesed-port situation can definitely cause one cylinder to get a noticeably different mixture than the other one that shares the same port.
Jerry
